Pro Street Motorcycle

Pro Street Motorcycle is the newest class to the Outlaw Street Car Reunion line of events, debuting in 2017 with a great field of some of the quickest street tire, no bar bikes on the planet. With various power adders allowed at different weights, Pro Street brings in some of the highest speeds of the event with multiple bikes clicking off 220 miles per hour blasts in the quarter mile! Rodney Williford stole the show in 2017 coming out in the VP Racing Fuels Professional Test Session and knocked off a 6.68 elapsed time, which was the quickest recorded elapsed time in the history of the category, then carried on to go #1 qualifier and bring home the big payday and the inaugural OSCR title back to North Carolina. PST automatically became a fan favorite with everybody involved in the event, from other racers, crew members to our own staff. The fast motorcycle category added a flavor with a hint of fear and sheer speed through the quarter mile traps.

The debut of the Pro Street Motorcycle category in 2017 was wildly popular between all of the doorslammer racers and the fans alike. Speed Promotions is proud to offer the Pro Street class once again in 2018 with $5,000 to Win!

Event Payout
Presented by: Great Lakes Racecraft, McIntosh Grayson Motorsports, Franklin Performance Concepts, Kinda Krazy Kustoms and NLR Motorsport Electronics

$5,000 to Win
$2,000 to Runner-Up
$600 to Semi-Finalists
$300 to Quarter-Finalists
$150 to Eighth-Finalists

$150 Entry Fee (Bike & Rider)
Fully Guaranteed Purse


CLASS RULES & REGULATIONS
2018 Rules Set, As of January 1, 2018

CLASS DESCRIPTION:
This class contests the ultimate in street-legal motorcycles. Created to legitimize illicit street racing, Pro Street is reserved for stock-appearing motorcycles with unlimited engine modifications. All bikes must be street legal and be powered by self-starting motorcycle engines.

DESIGNATION:
The class designation is PST. 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 category run on a .400 pro tree. The class will qualify a 32-bike field and be placed on a professional pairing ladder. Alternates will be used in the category if a rider is broken. Alternates will be inserted at the bottom of the ladder while the remaining drivers move up to fill the empty slot in the qualifying sheet and 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 if the one that must be used for the remainder of eliminations.

BIG-BORE BIKES:
Production big-bore bikes are permitted a single power adder.

LITER-CLASS BIKES:
Production liter-class bikes are permitted two power adders. Only the latest lightweight, high-tech import offerings, with a maximum production size of 1000cc, will be permitted to race under this designation, and each model must be approved for use by all parties. Currently, the following 2001 or newer models are approved for use under the liter-class designation of:

– BMW: S1000RR
– Honda: CBR929RR, CBR854RR, and CBR1000RR
– Kawasaki: ZX-9 and ZX-10
– Suzuki: GSXR1000
– Yamaha: YZF-R1

ENGINE:
Only production-based motorcycle engines are permitted and must utilize factory cases and cylinder heads, unless otherwise noted. Entrants running nitrous oxide are permitted to run aftermarket cylinder heads. Entrants running GS/KZ engine platform are permitted to run aftermarket cases. Aftermarket cylinder blocks are permitted. Any internal modifications are permitted. Nitrous oxide may not be used in conjunction with turbocharged or supercharged big-bore entrants. Nitrous oxide is permitted to be used in conjunction with turbocharged or supercharged liter-class entrants. Air or electric shifters are permitted.

INTERNAL ENGINE CASES:
Big-bore bikes with 1-piece top case/cylinder block designs.

CombinationMaximum Displacement
Turbocharged - Big BoreUp to 1370cc with no weight penalty. See chart at bottom of rulebook on weight penalty for 1371cc-1450cc max engine.
Supercharged - Big BoreUp to 1450cc with no weight penalty. See chart at bottom of rulebook on weight penalty for 1451cc-1660cc engine.
Nitrous Injected - Big Bore1660cc Maximum
Turbocharged - Original LiterUnlimited
Supercharged - Original LiterUnlimited
Nitrous Injected - Original LiterUnlimited

NITROUS OXIDE:
Entrants running under the nitrous injected category may use any style nitrous system with any number of solenoids or nozzles. Turbocharged entrants using nitrous oxide are limited to a single point of injection and should be designed with the possibility that future ruling may limit nitrous flow capabilities via a single regulated jet in the system. All turbo nitrous systems should be designed with this potential requirement taken into consideration.

SUPERCHARGERS:
Entrants are limited to a single centrifugal-style supercharger with a maximum inlet opening of 72.0mm. Wheel design limitations and measurement methods are identical to turbocharger rules. Any team desiring to compete with a supercharger of a design other than centrifugal (roots, screw, vane, etc.) must consult with the technical department to determine appropriate ruling and limitations at least 30 days prior to entering the event.

TURBOCHARGERS:
Entrants are limited to one turbo with a maximum turbo inlet opening of 62.5mm. Our technical department defines maximum turbo size as the maximum allowable diameter of the inlet housing at the point where the leading edge of the compressor wheel meets the inlet housing. All air entering the turbo must pass through this opening. No stepped inducer wheels permitted, the contour from the inducer to the exducer must be continuous without steps. The leading edge of inducer wheel may not exceed 62.5mm, and must fit inside the 62.5mm area of the inlet housing. The use of restrictor plates or stepped inlet housings in an effort to limit compressors with inducers larger than 62.5mm is not acceptable.

INLET COOLING:
Any type of intercooling permissible. Nitrous oxide may not be used as a cryogenic cooling source. Intercooling is not allowed on any entrant using methanol.

INTERCOOLER MOUNTING:
Any part of the turbo, supercharger or induction system may be mounted within the original bodywork/frame envelope in any available location. Components mounted outside of the bodywork are limited to an area no higher than 24 inches above the ground, 18 inches to either side of the bike centerline and no more than 3 inches forward of the front axle. Only air-to-air intercooler components may be mounted outside of the bodywork. No tanks, pumps or heat exchangers part of a liquid-to-air intercooler may be mounted outside of the bodywork envelope. No tanks or heat exchangers part of a cryogenic system may be mounted outside of the bodywork envelope, with the exception of spray bars, hoses and solenoids as part of an unsealed cryogenic spray bar mounted to an air-to-air intercooler. No ballast may be mounted to any part of the turbo, supercharger or induction system outside of the bodywork envelope. The use of ‘heavy’ parts in the design of induction, supercharger or turbocharger system components mounted outside of the bodywork is prohibited. OSCR technical official has final determination on the legality of the design of any externally-mounted components which could potentially be deemed ‘heavy’ parts and pre-approval of the design is highly recommended. Any design must allow the required access to both sides of the front axle for wheelbase measurements.

WATER INJECTION:
Entrants utilizing water injection must have the tank mounted in a manner to allow tech to easily inspect its contents. BIG BORE TURBOCHARGED BIKES, any entrant running under gasoline rules, absolutely no substance other than water is permitted to be in the tank. SUPERCHARGED bikes, any entrant running under gasoline rules, absolutely no substance other than water is permitted to be in the tank. LITER TURBOCHARGED bikes are permitted to run water or methanol in the tank. NITROUS OXIDE bikes are permitted to run water or methanol in the tank.

CLUTCH:
All clutch systems must be approved by the OSCR technical team for use in this class. Each interested manufacturer or team must submit sample parts for approval a minimum of 60-days prior to the event to desire approval eligibility. No pneumatic, electric or hydraulic clutch engagement, release or activation systems are permitted. The use of any electric or hydraulic system to assist or adjust clutch slippage or lock up is not allowed.
TURBOCHARGED: Slider clutches are prohibited. Pneumatic lockup assist clutches are permitted. Clutch engagement and disengagement must be controlled by conventional cable or hydraulic-activated 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 level is released. Idle may be set between 1500-2000rpm for this test. Air-assisted clutches must perform this test with the air feed disconnected from the clutch system. A convenient disconnect point should be designed into the system to facilitate this test. The use of ECU mapping or electrical system functions to simulate the positive results of this test are not allowed, engine kill must be as a direct result of clutch engagement drag.
NITROUS INJECTED: Any approved clutch system is permitted. Slider clutches are permitted. Pneumatic lockup assist clutches are permitted.
SUPERCHARGED: Any approved clutch system is permitted. Slider clutches are permitted.

TRANSMISSION: 
All entrants must utilize an OEM-style shift drum and transmission. Transmission must be installed in the original location engine cases. An AUTOMATIC TRANSMISSION is defined as any transmission designed in a manner that could allow override-style shifting. A transmission is considering to be an automatic transmission if it utilizes any components designed to allow the transmission to be simultaneously engaged in more than one gear. This includes, but not exclusive to, windowed shift drums, split forks, split gears, split fork slider rings, gear or fork detent springs, etc.
1-2 AUTO: Bikes utilizing a 1-2 auto may utilize automatic transmission components that allow override shifting from 1st to 2nd gear only. All power adder and platform combinations are allowed the use of a 1-2 auto. Check weight tables at bottom for appropriate weight considerations for the use of a 1-2 auto.
1-2-3 AUTO: Bikes utilizing a 1-2-3 auto may utilize automatic transmission components that allow override shifting from 1st gear to 2nd gear and from 2nd gear to 3rd gear. Turbocharged liter bikes are allowed the use of a 1-2-3 auto. Check weight tables at bottom for appropriate weight considerations for the use of a 1-2-3 auto.
FULL AUTO: Bikes utilizing a full auto may utilize automatic transmission components that allow override shifting in any or all gear change positions. All nitrous injected and supercharged entrants are allowed the use of a full auto. Check weight tables at bottom for appropriate weight considerations for the use of a full auto.

TRIPLE CLAMPS:
The steering stem offset on top and bottom triple clamps must be equal. Front axle offset may not be less than 1/2 inch. The use of triple clamps, steering stems, stem bearings, offset bearing races or any other components designed to increase or decrease the rake is prohibited. Axle must be in the center of the forks. Triple clamps can be made of a material other than aluminum only after approval of concept. Bottom of lower triple tree cannot be higher (must be flush or lower) than webbing of lower steering neck.

FRAME:
Stock OEM frames are required. No modifications to any portion of frame permitted, unless specifically noted. Allowable modifications are following. ALL BIKES may have frames polished, chromed, painted, powder coated or otherwise cosmetically altered, as long as such modifications do not remove substantial material or weaken the frame. No braces, gussets or crossbars may be removed unless specifically listed. Additional braces, gussets or crossbars may be added as long as they do not weaken the frame in any manner. Small accessory brackets, tabs, mounts, etc., using fasteners no larger than 5/16″ (8mm) may be removed, relocated or modified. New accessory mounts may be installed and new mounting holes may be drilled into the frame, as long as the hole size does not exceed 5/16″ (8mm). An excessive number of mounting holes will be considered lightening of the frame and is not permitted. Exhaust mounting brackets, center-stand and side-stand brackets, regardless of fastener size, may be removed as long as doing so does not weaken the frame. On turbocharged and supercharged entrants, steering heads must remain stock with the exception of the lower steering stem bearing race area. The bottom of the steering head may be re-machined or removed and replaced in order to increase the clearance between the front tire and the bottom triple clamp, a technique commonly referred to as ‘short necking.’ If short-necking has been performed, the new bearing race cup must use the factory bearing race and may not be located more than 1 inch above the original bottom webbing of the steering neck. The replaced or modified bearing race cup must be located along the same axis as the original location, i.e., the rake of the steering stem may not be altered during this modification. No other material beyond that reasonably necessary to perform the short-neck modification may be removed from the steering neck casting, with the exception of removal or modification of the steering stops and/or the headlight/fairing mount. For non-turbocharged entrants, frame may be altered in order to increase the rake. No de-raking of frames will be permitted. Location of bottom triple clamp must be in the same general location as the legal modifications permitted for turbocharged entrants. Seat rails/sub frames may be modified or relocated. Mounting tabs or brackets for these items may be modified or relocated as well. Rear suspension mounts including shock mount and rising rate linkage mounts may be relocated. However, due to the extreme loads and potential safety issues, modifications to these components will be heavily scrutinized. On turbocharged entrants, swingarm pivot mounts may not be modified. Swingarm pivot centerline cannot be moved in any manner, including offset bushings, plates, etc. Proper design, welding and bracing are crucial in these areas. Non-turbocharged entrants are permitted to relocate the swingarm pivot axle up to 2″ from its factory location. Engine mounting tabs and brackets may be modified. Bolt-on engine mounts may be replaced, but must maintain the same mounting dimensions as the factory mounts. Engine relocation in any manner is not permitted.
HONDA BLACKBIRD: The round tubular cross-brace, located directly behind the steering stem, may be removed. Upper rear sub-frame mount may be removed. It may cut off flush with the top of the factory frame spar but no farther.
KAWASAKI ZX-12, ZX-14: Airbox inlets may be welded shut or modified for better sealing with turbo dump pipe, as long as these openings are not enlarged. Access panels for throttle body/airbox connectors may be modified, as well as the mounting area for the connectors. These modifications may not weaken the frame. Opening for turbo pop-off valve may be cut in the airbox area of the frame as needed, as well as mounts for bungs for air sensors.
SUZUKI GSXR (EARLY MODELS): 1986-1987 750 and 1986-1988 1100 models may remove the square tubular cross-brace located generally above the carburetors. Late-model liquid-cooled models, factory equipped with engine mounts connecting between the cylinder head and the upper frame spar are not required to use these mounts. The mounting tabs for these mounts may be removed from the frame.
SUZUKI HAYABUSA: The round tubular cross-brace, located directly behind the steering stem, may be removed. Upper rear sub-frame mount may be removed. It may be cut off flush with the top of the factory frame spar but no farther.
SUZUKI GS & KAWASAKI KZ/Z1: Frames may be modified for a backbone fuel cell.

WHEELIE BAR:
Wheelie bars are prohibited.

SEAT:
Minimum seat height, with rider in position, seat compressed and 8 psi in rear tire, is measured from lowest point of seating position to the ground.
– Bikes that are required to have 3″ Ground Clearance: Minimum seat height of 22″.
– Bikes that are required to have 2″ Ground Clearance: Minimum seat height of 20″.

TIRES:
DOT-Approved motorcycle street tires only. Slicks are prohibited.

FUEL:
Any approved gasoline is allowed. Approved methanol is allowed with certain restrictions and penalties. Blending of fuels or use of additives is prohibited. Nitromethane, propylene oxide and ethanol are not allows in any entrants. TURBOCHARGED AND SUPERCHARGED LITER BIKES are allowed any approved methanol. Methanol may not be used in conjunction with any form of intercooling. Liter-class turbo and supercharged bikes are allowed the simultaneous use of both methanol and gasoline as fuels. Dual-fueled entrants must maintain the fuels in separate tanks to allow for fuel inspections. The mixing of methanol and gasoline in a single fuel tank is not allowed. See fuel tank for specifics on tank design. TURBOCHARGED AND SUPERCHARGED BIG BORE BIKES are prohibited the use of multiple fuel types. M1 methanol is allowed. Methanol may not be used in conjunction with any form of intercooling. See chart at the end of rule book for any relevant weight penalties associated with the use of methanol. NITROUS-INJECTED BIKES are allowed the simultaneous use of both methanol and gasoline as fuels. M1 methanol is allowed. Dual-fueled entrants must maintain the fuels in separate tanks to allow for fuel inspections. The mixing of methanol and gasoline in a single fuel tank is not allowed. See fuel tank for specifics on tank design.

APPROVED GASOLINE:
– VP Racing Fuels: C16, C23, C45, Q16, MR12, MRX01, MRX02 and Import
– Powermist: Dynol 832
APPROVED METHANOL:
– VP Racing Fuels: M1, M3 and M5

BODY:
All main body parts including upper fairing, side fairings, fuel tank, and tail section must have stock appearance and shape (i.e., no one piece bodies or tank shell, unless originally equipped). Front fenders are required and must be manufactured of plastic, fiberglass or carbon composite. All bodywork must match the type of frame being used (i.e., you cannot put GSXR bodywork on a GS frame, or ZX-14 bodywork on a ZX-10). Bodywork may be updated or backdated to later or earlier model bodywork if it is on the same model bike. Tail section or rear fender must extend past the rear axle. Replacement parts are permitted, but must retain the shape of the stock parts they replace. Altering of stock body shapes must be approved by OSCR. To allow access to nitrous bottles, all nitrous bikes must have thumb (butterfly) body fasteners on any aftermarket body pieces that cover bottle to allow removal of panel or section by hand without the use of tools.

FRONT FAIRING:
No portion of the front fairing or headlight may be mounted farther forward than 3 inches past the forward most part of the front tire. Access to the front axle for wheelbase measurements must be maintained (see wheelbase measurements). AFTERMARKET FAIRINGS: Due to potential rider safety hazards created by high terminal speeds, bikes originally produced with no front fairing or windscreen are allowed the use of aftermarket fairings, screens, and/or wind deflectors. Components should be of a professional design and implementation and they should be of a size and style appropriate for the particular motorcycle. All designs must be pre-approved by OSCR. The OSCR technical staff has final decision on what is deemed a safe and appropriate design.

FUEL TANKS:
Alterations of factory gas tanks are limited to sloping at rear of tank. Entrants using an aftermarket tank are required to run either a functioning fuel tank from the approved list, or a tank shell version of a tank from the approved list. Aftermarket fuel tanks and tank shells are limited to OSCR approved manufacturers and part numbers only. In order for a tank to be legal, it must be commercially available, at a fair market price, to anyone desiring to purchase one. Manufacturer or distributor must be able to maintain availability at all times, and must be able to make delivery within 30 days of order. Manufacturer or distributor has the right to demand full pre-payment, including any shipping charges, before considering an order to be completed. Companies desiring to produce production tanks for this application may submit tank designs for approval. NON-FUNCTIONING TANK SHELLS: Fuel cells may be mounted anywhere on the motorcycle within the bodywork. DUAL FUEL TANKS: Any bikes using both methanol and gasoline as fuels must maintain fuels in separate containment systems in order to allow fuel inspections.

Current Approved Aftermarket Tanks:

ManufacturerModel BikePart Number
Catalyst Racing CompositesHayabusaBUSOTK99, BUPSTK99, BUPS2TK99, BUPS3TK08, BUPS4TK08, VELOCITYTANK06, VELOCITYTANK08, BUPS4-SC, BULTK01
Montgomery MotorsportsHayabusaBUSA-GEN2-PROSTREETCOMPLETE
Del's Performance CyclesHayabusaDPCBUSTSHELL
TM MotorsportsHayabusaTM13PSTK
Catalyst Racing CompositesGSXR 1000GSXR1LTK05, GSXR1SOTK05, GSXR1LTK07, GSXR1GTT07, GSXR1SOTT05
Catalyst Racing CompositesGSXR 1100GSXR11LTK89
Montgomery MotorsportsGSXR 1100GSXR 1000 05-06 PROSTREETCOMPLETE
Catalyst Racing CompositesZX-14ZX14PSTK06, ZX14SOTK06
Catalyst Racing CompositesZX-12ZX12PSTK02
Catalyst Racing CompositesZX-10ZX10LTK04, ZX10GTK04
Air-Tech StreamliningCBR 1100XXCBRXX10S2
Air-Tech StreamliningCBR 1000 RR2CBR17M
Catalyst Racing CompositesBMW S1000RR#S1RRLTK10
Montgomery MotorsportsGS 1100GS1100 PROSTREETCOMPLETE

TAIL SECTIONS:
Seat location will be determined by a minimum distance of 29.5 inches measured from the centerline of the steering stem to the back of the seat, including padding, at the bottom most point measured at a 90 degree angle to the ground. Approval of all parts will be limited to 30 days prior to an event. Photos of parts installed on the exact bike must be submitted for approval. 

STARTING SYSTEMS:
All engines must be self-starting and utilize OEM-style starting systems. No push or roller starts. All systems must be on-board, no external devices may be used to assist the batteries or starter systems.

LAUNCH CONTROL:
The use of 2-steps and other launch control devices are legal for all entrants, as long as such devices do not violate any other equipment rules.

ENGINE MANAGEMENT SYSTEMS:
Engine management systems (EMS), also known as Engine Control Units (ECU) may be either factory or aftermarket units. Factory ECUs may be swapped from other makes or models of bikes. TECH INSPECTION at any time, on any motorcycle in competition, examine the maps, setting, data downloads or any function of any factory or aftermarket EMS, piggyback or inline fuel injection controller, ignition system, data acquisition system, or any other electronic device on the motorcycle. Tech officials may conduct this examination in any manner, including performing the examination with a team representative as an observer only. It is the responsibility of the competitor to have ready, at all times, the required components to submit to this examination. This can include a laptop or PC, software, passwords, download cables, etc. It is also necessary that the competitor or someone within the competitor’s team, is knowledgeable in the system being used, and is capable of assisting tech officials in navigating through any and all portions of the software. OSCR tech may also impound any component of an ECU or data recording system for further examination either on-site or off-site. Refusal to submit to any examination or failure to supply the required components for examination is grounds for disqualification and/or suspension. ECUs may not detect and may not be activated by radio transmitters, infrared, laser or sonic devices, or any track position devices or beacons. Also, they may not wirelessly (i.e., radio, infrared, sonic, etc.) transmit or receive information during the run to or from any source.

DATA ACQUISTION:
Any sensors, including infrared or ultrasonic, that measure the track Christmas tree or timing system, the track surface or any structure of the track facilities are prohibited. Any measurement or detection devices, including non-contact sensors (sonic, infrared, radar, laser, etc.) designed to detect or measure distance, position or heading of the motorcycle relative to the track or any other point or location external to the motorcycle is prohibited. The use of GPS, locator or position beacons, and locator or position transmitters is prohibited. Third wheel sensors, which is the use of any wheel or rolling device other than the normal front steering or rear drive wheel/tire to measure speed, distance or track position is prohibited. RIDE HEIGHT SENSORS are defined as any capable of measuring the distance between any fixed point on the motorcycle and the track surface. Ride height sensors are prohibited on any turbocharged or supercharged entrant. Any bike utilizing a ride height sensor during non-competition testing must completely remove the sensor from the motorcycle during any competition rounds. FRONT WHEEL SPEED SENSORS are not allowed on turbocharged and supercharged entrants. Any bike equipped from the OEM or any bike utilizing a front wheel speed sensor during non-competition testing must completely remove the sensor from the motorcycle during any competition rounds. At the discretion of the tech director, trigger wheels do not need to be removed for competition. TURBOCHARGED AND SUPERCHARGED ENTRANTS: Any electrical or mechanical device that may be used to activate, adjust or tune any engine functions including timing, fuel delivery or boost level based upon ride height, track position, front wheel speed or front suspension conditions is prohibited. Any sensors measuring front wheel/tire speed, position, temperature or pressure prohibited. Any sensor measuring any function of the front suspension including travel, distance, position or external or internal fork conditions are prohibited. Any mechanical, electrical, infrared, gyroscopic, ultrasonic or other type sensor that measures any function of ride height, orientation, inclination, pitch angle relative to horizontal (wheelie angle) or any other plane, roll angle or yaw angle is prohibited.

ELECTRICAL:
Functional charging system, head and taillight with brake light and kill switch required. Headlight and taillight must be retained in stock locations. Turn indicators optional. Headlight is required to be on during all qualifying and eliminations runs. In the event of failure of either the charging system or the lighting system, the tech department will allow repairs to be made prior to the next round of competition. This courtesy repair opportunity is only allowed once per event, per system. Failure by the rider or crew member to activate either the charging or lighting system is considered to be a system failure. Any failure of either system for the second time in the same event will result in an automatic disqualification.

HEADLIGHTS:
Factory headlight systems matching the bike model must be used. All of the original factory glass or plastic lenses must be used, may not be painted or wrapped (reasonable transparent tinting permitted) and must be mounted in the original location in the front fairing (or headlight bucket on non-fairing bikes). Non-fairing bikes must have the headlight bucket mounted in the factory location. All components which are part of the original beam generating and reflecting system and are visible from the outside of the bodywork, must be retained and may not be modified in any manner visible from the outside. These components include reflectors, secondary lenses, diffusers, bulb sockets and bulbs. All such components of both the low-beam and high-beam systems must be retained, even if that system is not in use. Required components may be mounted in any suitable manner. Any modification of the mounts, housing, or non-visible areas of the lenses, reflectors and other required components is permitted. However, lighting system must be enclosed to prevent the escape of light from behind the fairing or bucket. At least one bulb from either the low-beam or high-beam system must be on during competition. Unused bulbs do not need to be electrically functional and a high/low switching system is not required.

TAILLIGHTS:
All entrants must have a functioning taillight system, with operational tail and brake lights. Factory taillights are highly recommended. Non-factory tail lights and brake lights must emit any color light and must be sufficiently bright to be visible.

BALLAST:
Ballast is defined as any component attached to any part of the motorcycle, whose purpose is add weight to the motorcycle. Any component, regardless of weight, which serves a structural, mechanical and/or performance enhancing function is not considered to be ballast (i.e., as a general reference, if the component in question can be removed without affecting any functions of the motorcycle or decreasing structural integrity of the motorcycle, it is considered ballast). OSCR does reserve the right to deem any non-ballast component to be illegal, if its excessive weight or design creates a safety hazard or if its construction or implementation is of an unprofessional appearance. Ballast may not be mounted to any bodywork or other plastic or composite components, nor may it be mounted to any part of the rider’s body or equipment. Liquid or loose ballast (i.e., water, sand, rock, shot bags, etc.) is prohibited.
BALLAST MOUNTING: Ballast may be mounted to any portion of the frame, swingarm, seat mounts, rear sub-frame, fairing brackets or any suitable structural component with sufficient strength to safely support the weight of the ballast during the run. Ballast mounting must be sufficiently strong to support the weight of the ballast, as determined by the tech director. All ballast must be mounted within the outer dimensions of the frame, rear sub-frame, swingarm or bodywork. Ballast may not be mounted to any spring-mounted exhaust system components. If any exhaust or turbo system components are utilized to mount ballast, these components must have additional braces or struts to reduce the load on the exhaust or turbo system components. These supports must connect the ballast and/or exhaust/turbo components to rigid point(s) on an engine or chassis component and the supports, mounts and rigid mounting points must be of sufficient strength to support the ballast/exhaust/turbo assembly weight in race conditions.
CAPTURED BALLAST: Captured ballast is any material or component captured or contained within or around another component without the use of mounting fasteners. This form of attachment is still considered to be ‘mounted.’ This would include pourable ballast, such as epoxy or melted lead, inside of a tube or cavity. It would also include but not be limited to, other ballast material contained within welded, clamped or mechanically fastened components such as inside welded frame or swingarm components, inside a fork assembly or press-fit into a fork slider tube.
FRONT SUSPENSION BALLAST: No ballast may be mounted to any portion of the front suspension, brake system, fender system or rotating assembly. Unless specified otherwise, no parts of the front suspension, brake system, or fender system may be remanufactured from exotic heavy materials, including tungsten steel, HD-17, or Mallory metal [see exotic heavy materials]. Front suspension components other than the fork leg assemblies, front axle assemblies and front wheel assembly (this includes triple clamps, clip-ons, fender mounts, brake calipers and hangers, etc.) may be remanufactured from any legal materials, but must be constructed to dimensions reasonable for the application, with hardware reasonably-sized for the application. Whenever possible, OEM components will be used as a reference when determining what are appropriate sizes and dimensions. Lightening holes, gun-drilling and other weight-saving techniques utilized on the OEM components may be deleted. Pre-approval of custom or aftermarket components is highly recommended. The tech staff has final decision on all front suspension component matters and will be closely monitoring the use of these components.
EXOTIC HEAVY MATERIALS: OSCR defines an exotic heavy material as any material with a density higher than 8.1 grams per cubic centimeter. With the exception of components considered to be part of the fork, axle or front wheel assemblies, no front-end components may be manufactured from an exotic material.

WHEELS:
Cast wheels must have a 180mm or greater width tire. Wheels 7.00 inches wide or wider must have bead-locks. Bead-lock highly recommend on all rear wheels. 16-inch minimum diameter front wheels are permitted.
MAXIMUM FRONT WHEEL WEIGHT: Front wheel and brake rotor components may be manufactured from any material. Total weight of front wheel rotating assembly, including tire, rotor, bearings, etc. cannot exceed 29.0 lbs. Inner bearing spacers and any axle spacers not removable without the use of tools are included in the wheel weight. Any bearing or axle spacers removable by hand will be included in the front axle weight [see front axles]. No aftermarket or remanufactured components of the bearing or axle spacer assembly outside of the wheel may be larger than 1.5″ in diameter. Bearing spacers contained completely within the wheel and retained by the wheel bearings may be of any dimension. Unmodified OEM parts larger than 1.50″ are acceptable.

FRONT AXLES:
Front axle assemblies may be remanufactured or replaced with aftermarket components. Any aftermarket axle must have a dimple or hole in the center of the axle on each side to aid in wheelbase measurements (see wheelbase measurements). No part of the axle or nut may protrude more than 0.75″ beyond the outside of the fork legs. No remanufactured or replacement part of the axle, axle nut, or external bearing spacers may exceed 1.50″ in diameter. Unmodified OEM parts larger than 1.50″ are acceptable. If lead or other materials are used to ballast the front axle assembly, all ballast material must be captured inside a hollow axle tube, and the ballast material must be positively retained by welded or threaded caps or by some other positive mechanical retention system. The total weight of the front axle assembly, including spacers, nuts, washers, etc. may not exceed 4 lbs. total weight. This weight shall include all OEM and non-OEM parts.

FRONT SUSPENSION:
Rigid forks prohibited. Hydraulic-dampened tube type only, with a minimum tube diameter of 34mm. Front suspension must have sufficient hydraulic damping to allow safe operation. Modifications to existing OEM or aftermarket forks which completely remove or otherwise defeat the function of the damping systems is not acceptable. The design of custom forks must include sufficient damping for the safe operation of the motorcycle under race conditions. All entrants must have a minimum of 1″ travel in the front forks, with sufficient clearance around the fender, fairing, headlight, exhaust, etc. to allow the forks, fender and wheel/brake assembly to safely move across the full range of fork travel at any steering angle. Forks must have enough front spring force to keep forks extended at least 0.50″ above compression bump stop with bike sitting level and rider seated in riding position. Travel is measured from the compression bump stop to the rebound bump stop. NOTE: Having 1″ of exposed fork slider DOES NOT guarantee that 1″ of travel exists. No more than 1.5″ of upper tube (2″ on inverted forks) may be exposed above top triple clamp or clip-on, whichever is higher.
MAXIMUM FORK WEIGHT: Fork components may be manufactured of any materials. Fork weight includes all internal and external components of the fork, including the fork oil. Weight does not include axles, axle spacers or hardware, brakes, brake brackets or hardware, fenders, fender mounts or hardware, or any other components mounted external of the fork. Applicable fork weight is determined by the year model of the frame and not the year model of the forks.
MAXIMUM WEIGHT PER SIDE:
– 1999 and Newer Models: 9.0 lbs.
– 1998 and Older Models: 12.50 lbs.

REAR SUSPENSION:
On turbocharged and supercharged bikes, the use of any active suspension components is prohibited. Active suspension components include but are not limited to, electronic, pneumatic or air-operated shocks, forks, springs, dampers or ride height adjustments.

BRAKES:
Operational front and rear brakes are mandatory and must be in safe operating condition. Brakes lines must be OEM type or braided steel hose or stainless-steel line. Braided steel hose is highly recommended. Brakes lines are to be routed and mounted properly to insure no contact with moving parts. Carbon fiber brake pads or disks are prohibited. Braking forces must be generated and controlled solely by the rider. The use of any electrical or mechanical device to apply braking force at any point during the run is prohibited. ABS BRAKE SYSTEMS must be removed from motorcycles OEM-equipped with such systems.

WHEELBASE MEASUREMENTS:
In order to aid in performing wheelbase measurements, all entrants must have axles with either dimples or holes located in the center of the axles. These holes or dimples must be at least 1/4″ in diameter and at least 1/4″ deep and must be located on both sides of the front and rear axles. All components must be moved in a fashion to allow an unobstructed access to the axles from both sides of the motorcycle. With the front wheel straight and standing from a perpendicular side view on both sides, there must be a direct line of sight to both axles large enough to allow a wheelbase measurement tool of up to 1.5″ diameter to access the axles. No components of the bodywork, fender, turbo, exhaust or any other components may block this view. Fabrication and design should take into consideration these requirements.

GROUND CLEARANCE:
Belly pans and oil retention blankets may be removed to pass ground clearance test. All ground clearances are to be measured with the amount of air present in the rear tire at the conclusion of the run with rider sitting on bike, straight up perpendicular to the ground. No rider or team member is allowed to alter the pressure, measure the pressure or otherwise make any contact with either tire valve stem until the conclusion of the post-run technical inspection. If an entrant fails the ground clearance inspection and their rear tire has dropped below 8lbs they will be allowed, upon the tech director’s approval, to raise the rear tire to 8lbs and reattempt the ground clearance test.
NITROUS BIKES: Must have a minimum of 2″ ground clearance.
LITER BIKES: Must have a minimum of 2″ ground clearance.
TURBOCHARGED & SUPERCHARGED BIG-BORE BIKES WITH INTERNAL ENGINES CASES (I.E., ZX-14): Must have a minimum of 2″ ground clearance.
TURBOCHARGED & SUPERCHARGED BIG-BORE BIKES WITH SEPARATE BLOCK/ENGINE CASES (I.E., HAYABUSA): Must have a minimum of 3″ ground clearance.

RIDER WEIGHT:
All riders claiming a combination with rider weight requirements must weigh-in at tech inspection. Riders will only be allowed to wear one pair of underwear, one pair of shorts, one short-sleeved shirt and one pair of socks while being weighed in (shoes, jewelry, hats, watches, etc. must be removed and all pockets must be empty). Riders will only be given one chance to weigh-in at tech inspection and will be required to run the wheelbase placed for that weight. Any rider caught attempting to hide ballast on their person will be disqualified from the event immediately.

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 95 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.

TECHNICAL INSPECTIONS:
The OSCR has the right to inspect any competition vehicle or competitor at any time during the event and at any location on the track premises. For the purposes of collecting information in an effort to maintain class parity and verify the effectiveness of the current rules, these inspections may include the measurement, weight and design of components not specifically restricted by the rulebook. All efforts will be made to respect the concerns of competitors over issues of intellectual property and proprietary designs. If a competitor feels that a specific requested inspection will unduly reveal proprietary information, they may appeal to the race director. However, if the race director deems these inspections to be warranted and reasonably justified by the technical director, then the competitor must submit to the inspection or be immediately disqualified from the event.

MINIMUM WEIGHT:
All weights include both the bike and rider, and will be taken at the conclusion of each run.


Turbocharged – Big Bore

0-154 lb. Rider155 lb. Minimum175 lb. Minimum185 lb. Minimum195 lb. Minimum205 lb. Minimum
Base Weight: 650 lbs.Base Weight: 675 lbs.Base Weight: 700 lbs.Base Weight: 700 lbs.Base Weight: 700 lbs.Base Weight: 700 lbs.
68" Wheelbase +0 lbs.69" Wheelbase +0 lbs.70" Wheelbase +0 lbs.71" Wheelbase +0 lbs.72" Wheelbase +0 lbs.73" Wheelbase +0 lbs.
---70" Wheelbase -10 lbs.71" Wheelbase -10 lbs.72" Wheelbase -10 lbs.
---69" Wheelbase -20 lbs.70" Wheelbase -20 lbs.71" Wheelbase -20 lbs.
---68" Wheelbase -30 lbs.69" Wheelbase -30 lbs.70" Wheelbase -30 lbs.
----68" Wheelbase -40 lbs.69" Wheelbase -40 lbs.
-----68" Wheelbase -50 lbs.
1371-1450cc Engine +15 lbs.1371-1450cc Engine +15 lbs.1371-1450cc Engine +15 lbs.1371-1450cc Engine +15 lbs.1371-1450cc Engine +15 lbs.1371-1450cc Engine +15 lbs.
M1 Fuel +40 lbs.M1 Fuel +30 lbs.M1 Fuel +20 lbs.M1 Fuel +10 lbs.M1 Fuel +0 lbs.M1 Fuel +0 lbs.
Cryo-Cooler +20 lbs.Cryo-Cooler +15 lbs.Cryo-Cooler +10 lbs.Cryo-Cooler +5 lbs.Cryo-Cooler +0 lbs.Cryo-Cooler +0 lbs.
Integral Engine Cases -15 lbs.Integral Engine Cases -15 lbs.Integral Engine Cases -15 lbs.Integral Engine Cases -15 lbs.Integral Engine Cases -15 lbs.Integral Engine Cases -15 lbs.
1-2 Auto +50 lbs.1-2 Auto +40 lbs.1-2 Auto +30 lbs.1-2 Auto +20 lbs.1-2 Auto +10 lbs.1-2 Auto +0 lbs.
1-2-3 Auto Not Permitted1-2-3 Auto Not Permitted1-2-3 Auto Not Permitted1-2-3 Auto Not Permitted1-2-3 Auto Not Permitted1-2-3 Auto Not Permitted
Full Auto Not PermittedFull Auto Not PermittedFull Auto Not PermittedFull Auto Not PermittedFull Auto Not PermittedFull Auto Not Permitted

Supercharged – Big Bore

68" Wheelbase69" Wheelbase70" Wheelbase71" Wheelbase72" Wheelbase73" Wheelbase
Base Weight: 600 lbs.Base Weight: 625 lbs.Base Weight: 650 lbs.Base Weight: 675 lbs.Base Weight: 700 lbs.Base Weight: 725 lbs.
Any Size RiderAny Size RiderAny Size RiderAny Size RiderAny Size RiderAny Size Rider
1451-1660cc +25 lbs.1451-1660cc +25 lbs.1451-1660cc +25 lbs.1451-1660cc +25 lbs.1451-1660cc +25 lbs.1451-1660cc +25 lbs.
M1 Fuel +20 lbs.M1 Fuel +20 lbs.M1 Fuel +20 lbs.M1 Fuel +20 lbs.M1 Fuel +20 lbs.M1 Fuel +20 lbs.
Integral Engine Cases -15 lbs.Integral Engine Cases -15 lbs.Integral Engine Cases -15 lbs.Integral Engine Cases -15 lbs.Integral Engine Cases -15 lbs.Integral Engine Cases -15 lbs.
1-2 Auto Trans +0 lbs.1-2 Auto Trans +0 lbs.1-2 Auto Trans +0 lbs.1-2 Auto Trans +0 lbs.1-2 Auto Trans +0 lbs.1-2 Auto Trans +0 lbs.
1-2-3 Auto Trans +10 lbs.1-2-3 Auto Trans +10 lbs.1-2-3 Auto Trans +10 lbs.1-2-3 Auto Trans +10 lbs.1-2-3 Auto Trans +10 lbs.1-2-3 Auto Trans +10 lbs.
Full Auto Trans +25 lbs.Full Auto Trans +25 lbs.Full Auto Trans +25 lbs.Full Auto Trans +25 lbs.Full Auto Trans +25 lbs.Full Auto Trans +25 lbs.

Nitrous Injected – Big Bore

72" Wheelbase73" Wheelbase74" Wheelbase75" Wheelbase76" Wheelbase
Base Weight: 525 lbs.Base Weight: 550 lbs.Base Weight: 575 lbs.Base Weight: 600 lbs.Base Weight: 625 lbs.
Any Size RiderAny Size RiderAny Size RiderAny Size RiderAny Size Rider
Integral Engine Cases -15 lbs.Integral Engine Cases -15 lbs.Integral Engine Cases -15 lbs.Integral Engine Cases -15 lbs.Integral Engine Cases -15 lbs.
Full Auto Trans +0 lbs.Full Auto Trans +0 lbs.Full Auto Trans +0 lbs.Full Auto Trans +0 lbs.Full Auto Trans +0 lbs.
No Auto Trans -25 lbs.No Auto Trans -25 lbs.No Auto Trans -25 lbs.No Auto Trans -25 lbs.No Auto Trans -25 lbs.

Turbocharged – Original Liter

71" Wheelbase72" Wheelbase73" Wheelbase74" Wheelbase75" Wheelbase76" Wheelbase
Base Weight: 530 lbs.Base Weight: 550 lbs.Base Weight: 570 lbs.Base Weight: 590 lbs.Base Weight: 610 lbs.Base Weight: 630 lbs.
Any Size RiderAny Size RiderAny Size RiderAny Size RiderAny Size RiderAny Size Rider
Full Auto Trans +0 lbs.Full Auto Trans +0 lbs.Full Auto Trans +0 lbs.Full Auto Trans +0 lbs.Full Auto Trans +0 lbs.Full Auto Trans +0 lbs.

Supercharged – Original Liter

71" Wheelbase72" Wheelbase73" Wheelbase74" Wheelbase75" Wheelbase76" Wheelbase
Base Weight: 480 lbs.Base Weight: 500 lbs.Base Weight: 520 lbs.Base Weight: 540 lbs.Base Weight: 560 lbs.Base Weight: 580 lbs.
Any Size RiderAny Size RiderAny Size RiderAny Size RiderAny Size RiderAny Size Rider
Full Auto Trans +0 lbs.Full Auto Trans +0 lbs.Full Auto Trans +0 lbs.Full Auto Trans +0 lbs.Full Auto Trans +0 lbs.Full Auto Trans +0 lbs.

Nitrous Injected – Original Liter

74" Wheelbase75" Wheelbase76" Wheelbase77" Wheelbase
Base Weight: 450 lbs.Base Weight: 475 lbs.Base Weight: 500 lbs.Base Weight: 525 lbs.
Any Size RiderAny Size RiderAny Size RiderAny Size Rider
Full Auto Trans +0 lbs.Full Auto Trans +0 lbs.Full Auto Trans +0 lbs.Full Auto Trans +0 lbs.


Photo Credit: James Sisk Photography and SHOT By Taco
Video Credit: TheRacingVids