SDBA Logo

SDBA Rules

General Rules

APPROVED BIKES: SDBA only permits 2-wheel motorcycles with an Internal combustion engine to enter an event. Three or Four wheel vehicles are prohibited from entering a class at SDBA. 

BIKE NUMBERS: See the SDBA "Points System" document to read more about bike numbers. 

BURNDOWNS: If two racers are in the middle of a burndown, the starter will only let them continue for a reasonable amount of time. If any unreasonable amount of time is used the starter will point the racers to go in and stage. If the racers do not go in within 20 seconds of the starter pointing them in, then both racers are subject to disqualification. 

CHANGING BIKES: See policies below for changing bikes in different classes:

E.T.: A racer can change his or her bike in time runs or in 1st round (You still need to notify the tower to change). Whichever bike and rider runs first round it is locked and the bike nor the rider can be changed for the rest of eliminations for any reason. 

Pro: A racer can change his or her bike in qualifying if there is still another qualifying session for the class, however all previous qualifying data will be erased and the racer must re-qualify the new bike (You still need to notify the tower to change). A racer cannot enter a new bike into 1st round or any other round that was not qualified. Rider cannot be changed either. 

CLEAN-UPS & WARNINGS: If you have a problem with your bike such as: not running right, smoking, or excessive tire spin due to leaking fluids. Please pull over and stop as soon as you can safely. This will aid in clean-up time, allowing officials to get the track back up and going as soon as possible. If you are given an official warning, you are subject to disqualification if the starter must check the track behind you a second time. 

DIAL-IN: Always be sure to verify your dial-in is correct on the dial-in board before you start your burnout. Notify a track official if your dial-in needs to be corrected. It is the rider’s responsibility to be sure his/her dial-in is correct. There are no re-runs if you stage to an incorrect dial-in. Once you stage, it is a race. Dial-ins cannot be changed once it has been called to the tower, unless the race is held up and track officials have shut you off. Track officials do the best they can to be sure its correct, but they are only human. No re-runs, credits, or refunds if you stage to the wrong dial-in for any reason. 

GRUDGE RACING: Only the rider whose name is on the tech card may pick up the time slip from the ticket booth. In the event that there is a time slip printer failure and you need to pick up your time slip in the tower, only the rider whose name is on the tech card may pick up the time slip and they must bring their ID to the tower with them. This is done to protect the privacy of your time slip.

LADDERS: Lane choice is determined by the following method when a class is put on a ladder. 

In Heads-Up classes, lane choice is given to the rider with the better qualifying position. 

In Index classes, lane choice is given to the rider with the better qualifying position. 

LANE BOUNDARY: Any bike touching the center line, touching the wall, or hits a foam block during the measured race will be disqualified. In situations where a rider has a true bye or a broke bye in eliminations he/she is considered the automatic winner once he/she stages under power regardless if the bike touches the center line, touches the wall, or hits a foam block during the measured race. However, the rider will lose lane choice the next round. 

MALICIOUS CHEATING: Any racer caught maliciously cheating can be barred from all SDBA events for up to 1 year, forfeit all season points, and have to pay a $1,000 fine before returning to SDBA. Read the rulebooks and make sure your bike is legal. 

MAXIMUM E.T.: All motorcycles at SDBA running Street E.T. Must have a dial in faster than 12.99. All motorcycles at SDBA running Pro E.T must have a dial in faster than 7.99.

MEMBERSHIPS: SDBA does not require an SDBA Membership or license, however all racers are required to display SDBA decals on both sides of their bike. SDBA decals can be purchased at registration for $5.00 per two decals.  Keep them on your bike so you do not need to purchase them again for that bike. 

MULTIPLE ENTRIES IN SAME CLASS: See policies below for entering multiple times in a class: 

MULTIPLE ENTRIES: A single rider can only enter one bike per class per event. A single rider may use a different bike in the same class at a different event. 

PIT BIKES: Anyone who operates a pit bike, bicycle, golf cart, or anything else with wheels must be at least 16 years old with a valid state driver’s license. Anyone operating a pit bike under age or in an unsafe manner is subject to disqualification without a refund. 

QUALIFYING SHEETS & LADDERS: Always be sure to review the qualifying sheets and ladders, and make sure your bike number, name, hometown, and bike information is correct on the day of the race. 

RAINOUT: SDBA will do everything possible to complete the event in a timely manner. In the event of adverse weather conditions beyond our control, SDBA reserves the right to adjust the event schedule, canceling qualifying sessions, and/or rescheduling the event. Once a bike has made a time pass or a qualifying pass, your entry will not be refunded.

RIDER AGE: All participants must be at least 15 years old with a valid state driver’s license or permit. If you do not have a valid state driver’s license then you must be at least 16 years old with state issued ID card. 

SPONSOR DECALS: A class designation decal featuring the class sponsor will be provided for each class. You will need to display this decal on the front of your bike. If you are running the same bike in multiple classes please put all decals together.

STAGING: A rider must move forward into the stage beam, and cannot back into the stage beam. Any rider backing into the stage beam to set the tree will be disqualified. In order to win a round you must stage your bike under power, even if your opponent is broke and unable to stage. If for some reason you are held up by a track official such as: cleaning or getting debris from the track, waiting for slow bikes to clear the track, your engine is too hot to race, tires too cold, etc., let an official know immediately. Once you stage, it is a race. Courtesy staging is enforced in all classes. Deep staging is permitted in all classes, but the starter will not hold the tree. 

STAGING BURNDOWN: If two riders are pre-staged and have been warned by the starter to go in and stage the starter or the race director is permitted to step into the stage beam and light the third light to start the timeout clock, which will force the two riders to get into the stage beam and race. If one rider still does not stage and receives a red-light then he is the loser. If neither rider stages they will both receive a red-light, at this point both riders are disqualified. 

STAGING LANES: During eliminations, ET classes will be chipped in the staging lanes and the bye run will be based on the quickest reaction time from the previous round or time trial. All pro classes will be laddered for eliminations. Once bikes are paired on a ladder, all broke bye runs must wait until all pairs have been run first before you will be allowed to make a broke bye run. This effort gives the bike racers, that are not in the lanes yet a chance to make it to the lanes before the last pair of bikes makes it down the track. If this rule is taken advantage of by a particular team on a common occurrence, then the race director will decide what action will be taken. 

STARTING LINE AND STARTING BREAKAGE: If for some reason you are held up by a track official, such as to change a wrong dial-in, cleaning or getting debris from the track, waiting for slow bikes to turn off of the shutdown area, etc., and your engine is too hot to race, or tires to cold, let an official know immediately. Once you stage, it is a race. All bikes have 45 seconds after their burn out to pre-stage. If a bike is unable to pre-stage after 45 seconds, the starter will invite the other lane to pre-stage and the round will be forfeited by the broken bike. Once you declare you are broken to the starter, you have officially forfeited your run and will not be allowed to continue even if you are able to fix the bike. Once the starter tells you that the other lane is broke, you can choose to make a pass as a broke bye or break the beams. 

SUPERSEDE: All SDBA rules will supersede any rule in the NHRA or IHRA rulebook. If SDBA does not have a specific rule in place, then we will consult the NHRA and IHRA rulebook for a decision. SDBA race director will make the final decision on any conflicts between the NHRA and IHRA rulebook. 

TECH INSPECTION: Pro classes will be tech inspected at the scales. Sportsman and ET classes will be tech inspected at the racetracks normal tech location. Tech inspection reserves the right to inspect a motorcycle before, during or after the event is concluded for any reason at any location at the track. If a bike is tech inspected at the water box or in staging and does not pass, the rider is given 2 minutes to make adjustments. The adjustment period will only be given to a bike once during an event; second infraction is a no run. 

UNSPORTSMANLIKE CONDUCT: Any racer that causes physical harm to another person, or acting in an unsportsmanlike manner is subject to be barred from all SDBA events for up to 1 year, forfeit all season points, and have to pay a $1,000 fine before returning to SDBA. Please handle yourself like a sportsman.

PROTESTS:. If any competitor believes that another competitor has intentionally broken the rules in order to gain an advantage they are allowed to open an official protest with SDBA tech. Protests are to be made immediately following any event that raises concern in regards to cheating. If the event is during a round of competition the protest must be made for the next round of competition for that class begins. If a competitor is found guilty in the protest they will be asked to leave the property for the remainder of that event. If a competitor loses to an illegal bike during competition that rider will be placed back into the active field in place of the rider who broke SDBA rules. In order to protest a Mechanical engine issue requiring any engine cover be removed from the engine the protestor will be forced to put up a $400 inspection fee. In the event the bike in question is found to be in compliance, the fee will go to the rider under question. If the bike is found to be illegal the fee is then returned to the protester. All Protests are at the discretion of SDBA tech and will only be substantiated with reasonable suspicion.


Street E.T.

Class Description: Street E.T. is open to street legal bikes only. The class is run in a E.T. bracket racing format and is a great entry level class.

Designation: The class designation is S/ET. All entrants must display this designation on both sides of their motorcycle by their bike number.

Format: This is an 1/8 mile AND 1/4 mile E.T. bracket class run on a .500 full tree. This is an all run field. All bikes must be 12.99 & quicker in the 1/8 mile and 15.99 & quicker in the 1/4 mile.

Points: This class will be a points earning class at all SDBA events (see points system for more details)

GENERAL: A rider may only run one bike in this class, and that bike may only be entered one time in this class.

CHANGING BIKES: A racer can change his or her bike in time runs, qualifying, or before 1st round (You must notify the tower of changes). The bike and rider that runs first round is the one that must be used for eliminations, even if the class is completed on another weekend due to weather. 

BRAKES: Front brakes are mandatory and must be in safe operating condition.

ELECTRICAL: 2-steps (factory ECU manipulation included), delay boxes and electronic throttle stops are prohibited. Delay boxes and electronic throttle stops are not permitted on the motorcycle; they must be disconnected and removed. 

LIGHTS: All motorcycles must have a functional OEM headlight or aftermarket headlight. All motorcycles must have a functional OEM tail light or aftermarket tail light.

CLUTCH: Slider clutches prohibited. Clutch engagement and disengagement must be controlled by conventional cable or hydraulic-actuated clutch lever. With the engine off and the bike in gear, the clutch must have sufficient engagement force to prevent the bike from being rolled without either sliding the rear tire or rotating the engine. With the brakes locked or the bike otherwise blocked from rolling, the clutch system must have sufficient engagement force at idle to kill the engine if the clutch lever is released. Idle may be set between 1500-2000rpm for this test. The use of ECU mapping or electrical system functions to simulate the positive results of this test is not allowed, engine kill must be as a direct result of clutch engagement drag. Automatic transmissions of any kind, OEM or aftermarket, are not permitted in Street ET.

TIRES: DOT street tires only are permitted. All tires must have visible tread. DOT slicks are not permitted.

WHEELIE BARS: Wheelie bars are prohibited.

GROUND CLEARANCE: The motorcycle must have a minimum of 2” ground clearance with rider sitting on the bike. Bikes equipped with a billet flat oil pan (not cast) are exempt from the 2" ground clearance check.

GENERAL SAFETY: All riders must have a SNELL 05 or higher full face helmet, shoes above the ankle, leather gloves, and a protective jacket. Any rider running faster than 6.0 must also have leather pants. Pants and jacket are not required to be zipped together. No ballast may be mounted to any portion of the front suspension, brake system, fender system, or rotating assembly.

Pro E.T.

CLASS DESCRIPTION: Pro E.T. is open to all drag bikes and street bikes. The class is run in an E.T. bracket racing format.

DESIGNATION: The class designation is P/ET

FORMAT: This is an 1/8mile and 1/4mile E.T. bracket class run on a .500 full tree. This is an all run field. All bikes must be 7.99 & quicker in the 1/8 and 12.99 or quicker in the 1/4. 

Crosstalk: Crosstalk will be on for all Pro ET entrants and cannot be turned off.

POINTS: This class will be a points class at all SDBA events (see points system for more details)

GENERAL: A rider may only run one bike in this class and that bike may only be entered one time in this class.

CHANGING BIKES: A racer can change his or her bike in time runs, qualifying, or before 1st round (You must notify the tower of changes). The bike and rider that runs first round is the one that must be used for eliminations, even if the class is completed on another weekend due to weather. 

BRAKES: Front and rear brakes are mandatory and must be in safe operating condition.

CHAIN GUARDS: Chain guards are required on all entries.

ELECTRICAL: 2-steps, delay boxes, and electronic throttle stops permitted.

LIGHTS: A functional tail light mounted on tail section, swingarm, or wheelie bars is required

CLUTCH: Any style clutch permitted

TIRES: DOT tires or any size slick is permitted.

WHEELIE BARS: Wheelie bars are permitted

GROUND CLEARANCE: The motorcycle must have a minimum of 2” ground clearance with rider sitting on the bike. Bikes equipped with a billet flat oil pan (not cast) or a wheelie bar are exempt from the 2" ground clearance check.

GENERAL SAFETY: All riders must have a SNELL 05 or higher full face helmet, shoes above the ankle, leather gloves, a kill tether, and a protective jacket. Any rider running faster than 6.0 must have a leather jacket and leather pants. Pants and jacket are not required to be zipped together. Nylon or textile jackets and pants are not permitted, even if they have pads. All jackets and pants must be made of 100% leather. No ballast may be mounted to any portion of the front suspension, brake system, fender system, or rotating assembly.



Ultra Sportsman

Ultra Sportsman is open to all drag bikes and street bikes. This class is designed for the drag bikes and street bikes that want to run on a 6.00/9.30 index. 

DESIGNATION: The class designation is U/S. All entrants must display a bike number on both sides of their motorcycle. 

FORMAT: This is a 6.00(⅛ mile) 9.30 (¼ mile) Index class run on a .400 pro tree. This class is an all-run field. The #1 Qualifier will get the bye run in 1st round if there are an odd number of bikes. Pairings for all racers will be done by the SDBA computer system and placed on a Sportsman ladder. See ladders section of rules for a complete list of ladders. 

POINTS: This class will be a points class at all SDBA events. 

GENERAL: A rider may only run one bike in this class. The same bike cannot be entered twice in this class by the same rider or another rider. 

CHANGING BIKES: A racer can change his or her bike in time runs, qualifying, or before 1st round (You must notify the tower of changes). The bike and rider that runs first round is the one that must be used for eliminations, even if the class is completed on another weekend due to weather. 

BRAKES: Front brakes are required. 

CHAIN GUARDS: Chain guards are required on all entries. 

ELECTRICAL: 2-steps, delay boxes and electronic throttle stops are permitted. 

TIRES: DOT tires or any size slick is permitted. 

WHEELIE BARS: Wheelie bars are permitted. 

GENERAL SAFETY: All riders must have a SNELL 05 or higher full face helmet, shoes above the ankle, leather gloves, and a protective jacket. Any rider running faster than 6.0 must also have leather pants. Pants and jacket are not required to be zipped together. No ballast may be mounted to any portion of the front suspension, brake system, fender system or rotating assembly.

Super Comp

Super Comp is open to all drag bikes and street bikes. This class is designed for drag bikes and street bikes that want to run on a 5.60/8.90 index. 

DESIGNATION: The class designation is SC. All entrants must display a bike number on both sides of their motorcycle. 

FORMAT: This is a 5.60 (⅛ mile) 8.90 (¼ mile) Index class run on a .400 pro tree. This class is an all-run field. The #1 Qualifier will get the bye run in 1st round if there are an odd number of bikes. Pairings for all racers will be done by the SDBA computer system and placed on a Sportsman ladder. See ladders section of rules for a complete list of ladders. 

POINTS: This class will be a points class at all SDBA events. 

GENERAL: A rider may only run one bike in this class. The same bike cannot be entered twice in this class by the same rider or another rider. 

CHANGING BIKES: A racer can change his or her bike in time runs, qualifying, or before 1st round (You must notify the tower of changes). The bike and rider that runs first round is the one that must be used for eliminations, even if the class is completed on another weekend due to weather. 

BRAKES: Front brakes are required. 

CHAIN GUARDS: Chain guards are required on all entries. 

ELECTRICAL: 2-steps, delay boxes and electronic throttle stops are permitted. 

TIRES: DOT tires or any size slick is permitted. 

WHEELIE BARS: Wheelie bars are permitted. 

GENERAL SAFETY: All riders must have a SNELL 05 or higher full face helmet, shoes above the ankle, leather gloves, and a leather jacket. Any rider running faster than 6.0 must also have leather pants. Pants and jacket are not required to be zipped together. Nylon or textile jackets and pants are not permitted, even if they have pads. All jackets and pants must be made of 100% leather. No ballast may be mounted to any portion of the front suspension, brake system, fender system or rotating assembly.

Top Gas

Top Gas is the second quickest index class contested at SDBA events. Top Gas is open to all drag bikes and street bikes. This class is designed for the drag bikes and street bikes that want to run on a 5.10/8.20 index. 

DESIGNATION: The class designation is TG. All entrants must display a bike number on both sides of their motorcycle. 

FORMAT: This is a 5.10(⅛ mile) 8.20(¼ mile) Index class run on a .400 pro tree. This class is an all-run field. The #1 Qualifier will get the bye run in 1st round if there are an odd number of bikes. Pairings for all racers will be done in the tower by the computer system and placed on a Sportsman ladder. See ladders section of rules for a complete list of ladders. 

POINTS: This class will be a points class at all SDBA events. 

GENERAL: A rider may only run one bike in this class. The same bike cannot be entered twice in this class by the same rider or another rider. 

CHANGING BIKES: A racer can change his or her bike in time runs, qualifying, or before 1st round (You must notify the tower of changes). The bike and rider that runs first round is the one that must be used for eliminations, even if the class if completed on another weekend due to weather. BRAKES: Front brakes are required. 

CHAIN GUARDS: Chain guards are required on all entries. 

ELECTRICAL: 2-steps, delay boxes and electronic throttle stops are permitted. 

TIRES: DOT tires or any size slick is permitted. WHEELIE BARS: Wheelie bars are permitted. 

GENERAL SAFETY: All riders must have a SNELL 05 or higher full face helmet, shoes above the ankle, leather gloves, and a leather jacket. Any rider running faster than 6.0 must also have leather pants. Pants and jacket are not required to be zipped together. Nylon or textile jackets and pants are not permitted, even if they have pads. All jackets and pants must be made of 100% leather. No ballast may be mounted to any portion of the front suspension, brake system, fender system or rotating assembly.

Super Stock


CLASS DESCRIPTION: Super Stock motorcycles are 4‐strokenaturally aspirated production machines sold for street use.

DESIGNATION: The class designation is SS. All entrants must display this designation on both sides of their motorcycle by their bike number.

FORMAT: This is a 1/4 mile heads‐up class run on a .400 pro tree. The class will qualify a 32‐bike field and place them on a pro ladder.  

CHANGING BIKES: A racer can change his or her bike in qualifying if there is still another qualifying session for the class, however all previous qualifying data will be erased, and the racer must re‐qualify the new bike (You still need to notify the tower to change). The bike and rider that runs first round is the one that must be used for the remainder of eliminations, even if the class is completed on another weekend due to weather.

POINTS: This class will be a points class at all SDBA events.

1: ENGINE

Must remain completely stock. No polishing, no coatings. All internal and external engine parts must remain stock OEM with no modifications ,metal removal, or blueprinting.

2: FUEL INJECTION

Aftermarket fuel injection management systems that allow fuel or ignition timing adjustments must plug in‐line with the OEM, unmodified wiring harness and work in conjunction with the Factory ECU e.g. Bazzaz, Power Commander, Rapid bike. Factory ECU can be reflashed for tuning and derestricting. No stand‐alone, plug‐n‐play, or kit ECU’s are allowed. All units must be available for immediate shipment from U.S. warehouses to any of the manufacturers’ U.S. retail outlets for sale to the public. Availability must be maintained throughout the current racing season. Quick shifters that cut ignition and/or fuel are permitted.

3: INTAKE

The OEM airbox must be utilized. Air filter use is mandatory. Only commercially manufactured air filters permitted. External airbox supply ducts must be stock and may not be removed. Exhaust emission control valves and hoses may be removed and all airbox drains must be plugged. No routing of exhaust emission system to crank cases allowed. Velocity stacks can be rearranged utilizing stock OEM stacks of same model.

The OEM airbox must be utilized. Air filter use is mandatory. Only commercially manufactured air filters permitted. External airbox supply ducts must be stock and may not be removed. Exhaust emission control valves and hoses may be removed and all airbox drains must be plugged. No routing of exhaust emission system to crank cases allowed. After market velocity stacks that are readily available for sale are permitted.

4: CLUTCH

Clutch plates and springs may be replaced with aftermarket parts. Clutches may be backdated or modified to eliminate factory slipper clutch. Clutch cushion kits allowed.

5: BRAKES

Brake pads and brake lines may be replaced with DOT‐approved components. Brake disc may not be drilled. Rotors and Calipers must remain factory.

6: FRONT SUSPENSION

The use of a tie‐down strap will be permissible, but once in place the excess strap must be secured to prevent any adjustment as to be determined by the Tech Director. Standard production internal parts of forks may be modified to alter dampening. Aftermarket damper kits or valves may be installed. Fork springs may be replaced with optional or aftermarket springs. Fork caps may be modified or replaced to allow external adjustment of fork springs only. Steering Damper is recommended but not required. The stock steering damper maybe replaced with an aftermarket damper.

Minimum required suspension travel is 1‐inch. Maximum fork tube exposure above the upper triple clamp or clip‐on’s is 2 1/2‐inch. Front fender may be lowered for additional clearance.

7: REAR SUSPENSION

Rear suspension must have a minimum of 1‐inch travel. Rear suspension changes allow the use of an aftermarket dog bone with stock knuckle arm.

Factory Shock can be re‐valved only. No aftermarket shocks permitted.

8: FRAME

Stock frames required with no modifications. Stock wheelbase. Frame must display vehicle identification number. Frames may be polished. Steering

head angle may not be altered.

9: GROUND CLEARANCE

All Ground Clearance are to be measured with the amount of air present in the rear tire at the conclusion of the run with rider sitting on the bike, straight up, perpendicular to the ground. No rider or team member is allowed to alter or measure the pressure or make any contact with either tire valve stem until the conclusion of the post‐run tech inspection. The determined clearance will be measured to the most solid stop. No aftermarket oil drainplugs permitted.  

1000CC: All riders must maintain a minimum of 2‐inch ground clearance.

Big Bore: Riders less than 150 lbs. must maintain a minimum of 3‐inches ground clearance. Riders over 150 lbs. must maintain minimum 2‐inchground clearance. All year Suzuki Hayabusas will be allowed 2‐inch ground clearance.

10: SWINGARM

Must retain stock swingarm with no modifications.

11: WHEELS, SPROCKETS, CHAIN

Wheels must remain factory to make and model that were provided by the manufacturer. Polishing is permitted. Wheel bearing and seal modifications are permissible. Chain must remain OEM pitch. Aftermarket sprockets, Non‐O‐ring chains, and O‐ring chains with O‐rings removed are permitted.

12: TIRES

Tires permitted for Super Stock competition must meet the following criteria:

1. 120/60‐17 minimum tire size. Applicable DOT standards for motorcycle street use.

2. Properly marked with molded‐in DOT number and construction/compound identification

3. Available for immediate shipment from U.S. warehouse to any of the manufacturer’s U.S. retail outlets for sale to the public. Availability must be maintained throughout the current racing season.

4. Tire sizes can decrease, but may not be increased from original equipment

13: FUEL

VP MR12 Spec Fuel: This class uses a spec fuel of gasoline only. No nitro, no alcohol. All bikes must have a method to provide a fuel sample from the fuel system.

14: BODY

1. All fairings must be original stock parts with factory paint.

2. All fairing brackets must be original stock parts.

3. Factory seat may be cut and re upholstered.

4. Aftermarket windscreens permissible.

15: ELECTRICAL

The use of the following electrical aftermarket items is prohibited: Air shifters, stutters, two‐steps, datalogger and O2 sensor. Factory‐original, OEM shift lights are permitted. Shift lights may not be aftermarket products or retrofitted.

16: EXHAUST

Exhausts must be conventional, under‐pan, up‐sweep pipes. No sidewinders allowed. All aftermarket street pipes must be in stock and readily available for purchase. No one‐off exhaust pipes are allowed.

17: WEIGHT

All Bike weights will not exceed the factory wet weight.  

Super Stock does not permit the removal of any items not specifically listed within these rules. If it is not noted that it CAN be removed, it CANNOT be removed.

18: MODIFICATIONS

Additional modifications listed in this section are permitted. Absolutely no other changes from showroom stock will be permitted unless specifically addressed within these rules.

The following additional items may be removed:

1. Side marker lights, reflectors and mirrors. Disconnection must be made at stock connectors, not by cutting. Wiring harness must remain otherwise intact. Stock headlight required.

2. License plate bracket

3. Passenger footrest, mounting brackets, and grab rails.

4. Center and/or side stands

5. Aftermarket levers permitted

SUPER STOCK CLASS WILL HAVE A ZERO TOLERANCE POLICY WITHMANDATORY PENALTY.  IN THE EVENT THAT AMOTORCYLE IS FOUND WITH

ENGINE MODS, WEIGHT BALLAST, OR FUEL TAMPERING, THE RIDERWILL BE IMMEDIATELY DISQUALIFIED FROM THAT EVENT AND BANNED FROM

THE CLASS INDEFINITELY

GENERAL SAFETY: All riders must have full leathers (zipped together leathers are recommended and may be mandatory in future). All riders must have a SNELL 05 or higher full‐face helmet with shield, leathers gloves, and shoes above the ankle. All motorcycles and riders must pass IHRA safety inspection. Ballistic blankets are recommended but are not required. Tether kill switches required on all entrants. Kill switch, when activated, must disable ignition, fuel pump(s) and nitrous system solenoids.

4.60 Index

4.60 is the quickest index class contested at SDBA events. Weeks 4.60 is open to all drag bikes and street bikes. This class is designed for the drag bikes and street bikes that want to run on a 4.60 index. 

DESIGNATION: The class designation is 4.60. All entrants must display a bike number on both sides of their motorcycle. 

FORMAT: This is a 4.60Index class run on a .400 pro tree. This class is an all-run field. The #1 Qualifier will get the bye run in 1st round if there are an odd number of bikes. Pairings for all racers will be done in by the SDBA computer system and placed on a pro ladder. See ladders section of rules for a complete list of ladders. 

POINTS: This class will be a points class at all SDBA events. 

GENERAL: A rider may only run one bike in this class. The same bike cannot be entered twice in this class by the same rider or another rider. 

CHANGING BIKES: A racer can change his or her bike in time runs, qualifying, or before 1st round (You must notify the tower of changes). The bike and rider that runs first round is the one that must be used for eliminations, even if the class if completed on another weekend due to weather. BRAKES: Front brakes are required. 

CHAIN GUARDS: Chain guards are required on all entries. 

ELECTRICAL: 2-steps, delay boxes and electronic throttle stops are permitted. 

TIRES: DOT tires or any size slick is permitted. WHEELIE BARS: Wheelie bars are permitted. 

GENERAL SAFETY: All riders must have a SNELL 05 or higher full face helmet, shoes above the ankle, leather gloves, and a leather jacket. Any rider running faster than 6.0 must also have leather pants. Pants and jacket are not required to be zipped together. Nylon or textile jackets and pants are not permitted, even if they have pads. All jackets and pants must be made of 100% leather. No ballast may be mounted to any portion of the front suspension, brake system, fender system or rotating assembly.

VTWIN

CLASS DESCRIPTION: VTWIN is open to all drag bikes and street bikes. The class is run in an E.T. bracket racing format.

DESIGNATION: The class designation is VT/ET

FORMAT: This is a 1/8mile and 1/4mile E.T. bracket class run on a .500 full tree. This is an all run field. All bikes must be 9.99 & quicker in the ⅛ and 17.99 & quicker in the ¼ .

POINTS: This class will be a points class at all 2021 SDBA events (see points system for more details)

GENERAL: A rider may only run one bike in this class and that bike may only be entered one time in this class.

CHANGING BIKES: A racer can change his or her bike in time runs, qualifying, or before 1st round (You must notify the tower of changes). The bike and rider that runs first round is the one that must be used for eliminations, even if the class is completed on another weekend due to weather. 

BRAKES: Front brakes are mandatory and must be in safe operating condition.

CHAIN GUARDS: Chain guards are required on all entries.

ELECTRICAL: 2-steps, and electronic throttle stops permitted. Delay boxes are not permitted for use but may be left on the bike and set to zero

LIGHTS: A functional tail light mounted on tail section, swingarm, or wheelie bars is required

CLUTCH: Any style clutch permitted

TIRES: DOT tires or any size slick is permitted.

WHEELIE BARS: Wheelie bars are permitted

GROUND CLEARANCE: The motorcycle must have a minimum of 2” ground clearance with the rider sitting on the bike. Bikes equipped with a billet flat oil pan (not cast) or a wheelie bar are exempt from the 2" ground clearance check.

GENERAL SAFETY: All riders must have a SNELL 05 or higher full face helmet, shoes above the ankle, leather gloves, a kill tether, and a protective jacket. Any rider running faster than 6.0 must have a leather jacket and leather pants. Pants and jackets are not required to be zipped together. No ballast may be mounted to any portion of the front suspension, brake system, fender system, or rotating assembly.

Juniors

Class Description: The Junior Dragster class is a class designed for half scale dragsters with a 5HP based engine. 

Format: This is an 1/8 mile E.T. bracket class run on a .500 full tree. This is an all run field. All cars must be 15.99 & quicker but no faster than 7.69

Points: This class will be a points earning class at all SDBA events (see points system for more details)

GENERAL: A driver may only run one car in this class, and that car may only be entered one time in this class.

CHANGING CARS: A racer can change his or her car in time runs, qualifying, or before 1st round (You must notify the tower of changes). The car and driver that runs first round is the one that must be used for eliminations, even if the class is completed on another weekend due to weather. 

BURNOUTS: Cars cannot be held in place or touched by a parent or crew member during the burnout. Vehicles are not permitted to burnout past the starting line.

DIAL-INS: The driver and crew are responsible for the accuracy of their dial in.

AGE LIMIT: Drivers must be at least 8 years old . Drivers may compete through the calendar year of their 18th birthday, provided they turn 18 before July 1 of the current year

ARM RESTRAINTS:  Mandatory

NECK COLLAR: Mandatory

PROTECTIVE CLOTHING: All Drivers are required to wear a jacket meeting SFI Spec 3.2a-1 as well as full length pants, shoes, socks, and gloves. The use of nylon or flannel pants is prohibited.

HELMET: All riders must have a SNELL 05 or higher full face helmet

DRIVETRAIN CHAIN/BELT GUARD: All cars must be equipped with a guard to cover the width and at least the top run to the centerline of the sprocket of any chains or belts. Guards must be minimum .060" steel, or . 125" aluminum, and must be securely mounted; no tie wraps. Moving engine/drivetrain parts must be protected by frame rails or steel or aluminum guards to avoid unintentional contact.

CLUTCH: All cars must be equipped with a dry centrifugal-type engine clutch. Chain or belt drive only. Axle clutches prohibited. 

FLYWHEEL: Aftermarket billet flywheel mandatory unless OEM type carburetor is used. Cast aluminum flywheel prohibited. Modification to stock units other than keyway modifications is prohibited. 

TRANSMISSION: Gear-type prohibited. Torque converter belt assembly units allowed.

BRAKES & SUSPENSION: Two-wheel hydraulic steel drum or disc brakes, or IHRA accepted mechanical brakes mandatory. Steel brake lines mandatory on 8.89 or quicker. No part of lines may run below the bottom frame rails. Drilling of brake components prohibited. Live axles may have brakes on one wheel only if a 7'' minimum go-kart disc brake is used. 

ELECTRICAL IGNITION SHUTOFF: A positive ignition shutoff switch, within easy reach of the driver, mandatory. A second shutoff switch on the center top portion of the deflector plate within easy reach of the crew or race official mandatory. All entries must have a mechanical shutoff switch to ground the spark plug located within easy reach of the driver. FC additional switches must be on the upper rear drivers side of the vehicle labeled as to function. 

TAIL LIGHT: Functional tail light mandatory. It must be visible from the rear of the car. 

ENGINE: All vehicles restricted to a maximum of one, rear-mounted, five horsepower based, four-cycle engine. Porting, polishing and relieving of block is permitted. Welding to the intake port is permitted. Machining of deck surface permitted. Adding material to the deck surface in any matter will be prohibited. All components must be completely isolated from the drivers compartment. This includes the fuel system. Accepted aftermarket engines: Metro Racing flathead, McGee Racing flathead, Tecumseh flathead, Pure Power Racing flathead, LPW Racing Products, JR Race Car flathead, Huddleston Performance flathead and R&S Machine flathead Monster Racing, SR 71 Racing, Soltz racing and M-1 machine block. 

CAMSHAFT: Any camshaft permitted. Any valve spring permitted. No overhead cams permitted. Any size valves permitted. 

CARBURETOR: Any means to pass fuel or air to the engine other than normally aspirated carburetor is prohibited. Auxiliary vacuum fuel pump allowed. Pressurized and/or fuel injection systems prohibited. Electric fuel pumps prohibited. 

CYLINDER HEAD: Aftermarket units permitted. No overhead valve head permitted. 

FUEL: Gasoline or alcohol only. Nitrous oxide and or nitromethane and/or propylene oxide prohibited in all classes. Fuel tank must be behind the driver's compartment, below the shoulder hoop of the roll cage and securely mounted within frame rails. Maximum capacity of one gallon, must have screw-on or positive locking cap. All vents must be routed downward, away from the driver and extend beyond the bottom of the fuel cell. No vented fuel caps permitted, except on Briggs & Stratton or Tecumseh stock tanks. 

IGNITION SYSTEM: Magneto or battery ignition systems permitted. Maximum one spark plug. MSD Ignition # 41510, 41500, and 42231 are the only accepted units. If the system has a low side rpm limiter it must be set to 0. Accepted coils: MSD 4291, 8232, and Master Blaster 2 and 3. Any alterations or additions to the systems are prohibited. 

OIL SYSTEM: Oil additives for the intent of producing power prohibited. 

STARTER: Pull rope or remote electric starters mandatory. Any driver activated/operated starting system prohibited. 

SUPERCHARGER-TURBO CHARGER-NITROUS OXIDE: Prohibited. 

THROTTLE: All vehicles must be equipped with a positive throttle return spring which shall close throttle when released. Throttle control must be operated manually by the driver's foot: electronics, pneumatics, hydraulics, or any other device may in no way affect operation of the throttle. Throttle stops, other than mechanical (i.e. a positive stop under throttle pedal) prohibited. Must be mounted securely (wire ties prohibited). 

FRAME BALLAST: Must be secured to frame with a minimum of one 3/8 bolt per 5 pounds. Hose clamps/ties/wraps/etc. may not be used to attach ballast to the entry. No ballast may be installed on the vehicle higher than the top of the rear tires. 

CATCH CANS: and lines must be securely fastened. 

DEFLECTOR PLATE: A deflector plate of a minimum 1/16" aluminum must be installed between roll cage and engine extending from lower frame rail to the top and width of the driver's helmet. Carbon fiber is prohibited. 

GROUND CLEARANCE: Minimum three (3) inches front of car to 12 inches behind centerline of front axle. (2) inches for the remainder of the car. 

ROLL CAGE: Mandatory five-point roll cage. Upper frame rails-minimum 1 1/8" diameter by .083. Diagonals-minimum 3/4" by .083". Uprights in the driver's compartment must be spaced by 20" or less. Must conform to standard dragster configuration as outlined elsewhere in this guide. 

SHEET METAL: Driver compartment interior must be aluminum, steel or fiberglass. 

STEERING: All components must have a positive through-bolt or welded connection. All rod ends must be of aircraft quality or better, and they must have a bolt through with lock nut or drilled and cotter keyed. Steering must also have washers on bolts to keep rod ends from pulling through. Minimum Spindle diameter is 1/2". 

WHEELBASE: Dragsters Minimum 90". Maximum 150" on the long side. Maximum 2" wheel base variations from left to right. Funny Cars 70" to 95", Roadsters 65" to 95 (2" variation maximum.) 

INTERIOR SEAT: Properly braced and supported seat constructed of aluminum or fiberglass mandatory. 

UPHOLSTERY: Optional. 

RESTARTS: After initial start-up, one chance will be given to restart the car within a reasonable time at the starter's discretion. The crew person should keep the starter close by in case it's needed. Push starting any vehicle is prohibited. 

STAGING: Once an entry reaches the front of the staging lanes for a run, it must be prepared to fire and race. In order to be a legitimate race winner, the competitor must start and self stage the vehicle under applied power. This rule also applies to single runs. All competitors will be given reasonable time to re-fire their entry, provided it is not pre-staged. The amount of reasonable time is determined by the starter. Crew members are prohibited from touching the vehicle after it is pre-staged. Crew members touching the vehicle once it is pre-staged will be disqualified. 

STAGING: "Auto Start" will be used in all classes at all SDBA events. Once both cars are pre-staged and the first car fully stages, the second car has a predetermined amount of time (7 seconds) to stage before the tree is automatically activated. This predetermined amount of time is referred to as "Time Out." If the second car fails to stage before the system "Times Out," it will be given a red light. If either car rolls deep after "Auto Start'' has been activated, the competitor accepts the deep staging and will not be pulled back. "Courtesy Staging" is mandatory at all Junior events. If a competitor unintentionally lights both bulbs before the opponent stages, the starter will pull the vehicle back and allow it to re-stage. This is considered a "pull-back" and will only be permitted one time. The starter has full control. 

DEEP STAGING: Is allowed but not guaranteed. The auto start system will be activated when both cars are pre-staged, so if you are staging deep you should do it in a timely fashion. Crew members may assist the entry in the pre-staging of the vehicle. Once the entry is pre-staged, crew members must be behind the vehicle and out of both competitors' view. Pull backs in the case of over staging are permitted one time if time permits. If the auto start system cycles during the pull back, the run will stand. THE FINAL STAGING MOTION, USING APPLIED POWER, MUST BE IN A FORWARD MOTION GOING FROM PRE-STAGE TO STAGE. 

SUPPORT GROUP COMMUNICATIONS: 2-way communication of any kind is prohibited. The use of any handheld portable device such as an MP3 player or iPod is also prohibited on race track or any time the competitor is seated in the vehicle.

COMPUTERS: Prohibited. See General Regulations for specific information. 

DELAY BOXES: Prohibited. 

DATA RECORDERS: Permitted. May be utilized to record engine RPM, cylinder head and exhaust temperature. No sensor of any type may be used on the front wheels or spindles. All data recorders and related components including switches, push buttons and wires must be located outside of the drivers compartment and isolated from the drivers view. Data recorders may only be activated by a crew member and must be done before the entry Pre Stages. The units may not display any information to the driver or remote location. A tachometer that incorporates download capabilities is classified as a data recorder. (See General Regulations: Data Recorders/Electronic Devices for specific information.) 

GAUGES: Engine and Cylinder head temperature gauges are permitted. A tachometer meeting specific guidelines is also permitted. (See General Regulations: Data Recorders/Electronic Devices for specific information.) 

STAGING DEVICES: Mechanical, hydraulic, electric or pneumatic staging systems prohibited. 

TIRES: Rear tires; 18" diameter X 7 1/2" wide minimum, measured at widest or tallest point. All front tires must have a manufacturer's maximum inflation rating. Tires may not be inflated above manufacturer's rating. All tires must be pneumatic. No solid tires. Treatment of tires in the lanes, burnout area or starting line is not permitted and tire covers must be removed prior to leaving the head of the staging area. 

WHEELS: Front wheels, five-inch diameter minimum with a minimum spindle diameter of 1/2". Front spindle must be able to retain a cotter pin, or use a nylon locking-type nut, Rear wheels, eight-inch diameter minimum. No modifications allowed to any wheels. 

TOWING: Tow vehicles in the form of golf cart, three or four-wheel support vehicle is mandatory. Full-size tow vehicles prohibited. Driving of Jr. Drag Racing vehicle through pits is only allowed if the driver is 16 years of age or older. Tow vehicle operated "ONLY" by an adult or street-licensed individual. Any time a Jr. Drag Racing vehicle is being towed, the driver must be seated in the cockpit. No passengers. The tow strap may not be attached to any point of the roll cage. It is recommended that all entries utilize a fluorescent or brightly colored flag attached to the entry any time the vehicle is being towed. Minimum height of flag is five feet. 

WARM-UPS: Any time a car is started, whether in the pits or in the staging lanes, a qualified driver must be seated in the vehicle. 

Protests: A protest in regards to these rules needs to be made immediately after cause is found. Protests are to be handled by SDBA tech and if found to be out outside of the allowed rules the competitor will be removed from the race. In the event of a loss the competitor who lost due to an illegal car will be placed back into the race so long as the protest is completed before  the next round begins.


Shootout

CLASS DESCRIPTION: Friday night shootouts are open to all drag bikes and street bikes. The class is run in an E.T. bracket racing format.

FORMAT: This is an 1/8mile and 1/4mile E.T. bracket class run on a .500 full tree. This is an all run field. All bikes must be 9.99 & quicker in the 1/8 and 12.99 or quicker in the 1/4.

Crosstalk: Crosstalk will be on for all Shootout entrants and cannot be turned off.

POINTS: This class will be a points class at all SDBA events (see points system for more details)

GENERAL: A rider may only run one bike in this class and that bike may only be entered one time in this class.

CHANGING BIKES: A racer can change his or her bike in time runs, qualifying, or before 1st round (You must notify the tower of changes). The bike and rider that runs first round is the one that must be used for eliminations, even if the class is completed on another weekend due to weather. 

BRAKES: Front are mandatory and must be in safe operating condition.

CHAIN GUARDS: Chain guards are required on all entries.

ELECTRICAL: 2-steps, delay boxes, and electronic throttle stops permitted.

LIGHTS: A functional tail light mounted on tail section, swingarm, or wheelie bars is required.

CLUTCH: Any style clutch permitted.

TIRES: DOT tires or any size slick is permitted.

WHEELIE BARS: Wheelie bars are permitted.

GROUND CLEARANCE: The motorcycle must have a minimum of 2” ground clearance with rider sitting on the bike. Bikes equipped with a billet flat oil pan (not cast) or a wheelie bar are exempt from the 2" ground clearance check.

GENERAL SAFETY: All riders must have a SNELL 05 or higher full face helmet, shoes above the ankle, leather gloves, a kill tether, and a protective jacket. Any rider running faster than 6.0 must have a leather jacket and leather pants. Pants and jacket are not required to be zipped together. Nylon or textile jackets and pants are not permitted, even if they have pads. All jackets and pants must be made of 100% leather. No ballast may be mounted to any portion of the front suspension, brake system, fender system, or rotating assembly.