2010 RULE BOOK

SECTION 10 - TECHNICAL RULES BY DIVISION

10.1 KART CHASSIS SPECIFICATIONS:

10.1.A All kart chassis must comply with WKA Speedway Dirt Series chassis specs as listed in section 400 (Subsections 411 & 413 do not apply) of the WKA 2010 Tech Manual unless listed otherwise in the 2010 WVMP rule book. In the event of any conflict between WVMP & WKA rules, WVMP rules will take precedence. 2010 WKA Tech Manuals are available from WKA, JC Specialty, JRS Kart Parts, or other similar suppliers.

10.1.B TIRES: Must be Burris Dirt Slicks. Any series or compound is acceptable. NO grooving or siping. Grooves from rubbing nerf bars, etc., or tires that were previously siped but have been worn to the point the sipes are barely evident will be allowed at the tech inspectors discretion. IT IS HIGHLY RECOMMENDED IF YOU HAVE SUCH A TIRE THAT YOU GET APPROVAL BEFORE RUNNING IT!

10.1.C BODY: Body may be either a junior or senior body, provided the driver has sufficient visibility when seated in the racing position.

10.1.D Quick release steering hubs may be used in all divisions. Hub may be of bolt on design or welded, and must securely fasten steering wheel to shaft. Any hub not fastened in a manner acceptable to the tech inspector will require replacement.

10.2 CAGED /CHAMP KART CHASSIS SPECIFICATIONS:

10.2.A All caged kart chassis must comply with WKA Speedway Dirt Series chassis specs at listed in section 400 (Subsections 411 & 413 do not apply) of the WKA 2010 Tech Manual unless listed otherwise in the 2010 WVMP rule book. In the event of any conflict between WVMP & WKA rules, WVMP rules will take precedence. 2010 WKA Tech Manuals are available from WKA, JC Specialty, JRS Kart Parts, or other similar suppliers.

10.2.A.1 Caged karts must have a four point cage. Cage should be at least 3” above the top of the driver’s helmet when strapped in car. Main cage must be constructed of tubing with a minimum outside diameter of 1”. Cage may be clamped to frame for easy removal, and should fasten to frame just ahead of rear bumper and from a point falling from just behind front spindle centerline to the front of the frame. Cage MUST be clamped in front. May be clamped or use tubing slid over frame on rear. NO HEIMS may be used for mounting. NO flattened the front downtubes and bolting to the front bumper tab unless a second tab is welded to the frame to form a support on BOTH sides of the cage. Any other mounting method must meet the approval of the tech inspector. Hoops must be connected front and rear. A single support bar should be run along left side of cage. This bar should be a minimum of ¾” in diameter, and may have a ‘slip joint’, at least 3” long, on one end to allow chassis flex. This bar may have a single “bed rail” type hoop on top of it for added protection. This side support must bend outward and follow near the body line to allow sufficient room to prevent the drivers head from striking it in a crash. THIS BAR MAY NOT RUN STRAIGHT FROM THE FRONT HOOP TO THE BACK HOOP AND MUST ALLOW SUFFICIENT HEAD CLEARANCE! Another support bar should be run across rear of cage, approximately shoulder height. This bar should be a minimum of ¾” in diameter, and should be no more than 8” from rear of seat. Shoulder straps should mount here. All tubing must have a minimum wall thickness of .065”. All corners must be bent. No 90 degree cut-and-welded corners. Cage must be constructed of D.O.M. type steel minimum. NO CONDUIT! A headrest within a reasonable distance of the drivers helmet is is highly recommended.

10.2.A.2 A racing approved 4 point harness must be used. Webbing must be a minimum of 1 7/8” wide and must be in good, non frayed condition. Whether the condition or age of belts constitutes replacement is at the discretion of the tech inspector.

10.2.A.3 Arm restraints mandatory in all caged classes!

10.2.B TIRES: Must be Burris Dirt Slicks. Any series or compound is acceptable. NO grooving or siping. Grooves from rubbing nerf bars, etc., or tires that were previously siped but have been worn to the point the sipes are barely evident will be allowed at the tech inspectors discretion. IT IS HIGHLY RECOMMENDED IF YOU HAVE SUCH A TIRE THAT YOU GET APPROVAL BEFORE RUNNING IT!

10.2.C BODY: Body may be either a junior or senior body, provided the driver has sufficient visibility when seated in the racing position.

10.2.D ALL YOUTH AND SPORTMAN CAGED KART DIVISIONS MUST HAVE A LOOP STYLE REAR BUMPER THAT IS ROUNDED ON THE ENDS. MAY NOT EXTEND PAST WHEEL EDGE, MUST COVER AT LEAST HALF OF THE REAR TIRE WIDTH.

10.3.E Champ karts will be permitted to run with all caged kart divisions. CHAMP KART CHASSIS MUST COMPLY WITH 2010 WKA CHAMP KART REGULATIONS IN SECTIONS 475 & 486. We HIGHLY RECOMMEND, though not mandatory, retro-fitting a kart type nose and loop style rear bumper onto the chassis.

10.3.A BRIGGS RAPTOR 5HP ENGINE SPECIFICATIONS

10.3.A.1 Raptor 5HP (Flathead) engine rules will be enforced as written in sections 701 (B & S Raptor 5hp Stock) & 760 (General 4 Cycle Notes) of the 2010 WKA Tech Manual. We cannot print the WKA Rules due to copyrights. Racers wishing to view them must purchase a WKA 2010 Rule Book. They are available at JRS Kart Parts (www.jrskartparts.com).

10.3.A.2 Youth divisions must run designated restrictor plate and weight as listed in the divisions section.

10.3.B BRIGGS ANIMAL ENGINE SPECIFICATIONS

10.3.B.1 Animal engine rules will be enforced as written in sections 704 (B & S Stock Animal) & 760 (General 4 Cycle Notes) of the 2010 WKA Tech Manual. We cannot print the WKA Rules due to copyrights. Racers wishing to view them must purchase a WKA 2010 Rule Book. They are available at JRS Kart Parts (www.jrskartparts.com).

10.3.B.2 Youth divisions must run designated restrictor plate and weight as listed in the divisions section.

10.3.C CLONE ENGINE SPECIFICATIONS

10.3.C.1 The intent of the clone classes is to provide a low cost out “out of the box” engine package for the beginner or budget minded kart racer. With that said, it is acknowledged that there are mutliple “clone” engine manufacturers, and that there are certain convenience and/or safety modifications that have to be allowed as well as some dimensional guide lines to verify the engines legality when the need arises to inspect internal components. The following rules are written to serve that purpose. Should the need to amend these rules in the interest of safety or equality in competition, they will be amended and the rule modification made clear on the track website and in the weekly drivers meeting (once the season has begun).

10.3.C.2 Approved engines – OHV engines generally referred to as Clones with a maximum displacement of 200 cc’s. (Current legal engines include the Lifan, Grey Hound, Harbor Freight Blue & Yellow, Jaing Dong, Yamakoyo, Blue Max)

10.3.C.3 Engine Components: Must be original OEM items in their stock state unless otherwise specified. Removal of unnecessary OEM items such as exhaust system, air cleaner, fuel tank, governor, low oil sensor, etc is permitted.

10.3.C.4 Block must remain stock as produced. Stub for governor may be removed and hole plugged. No machining of block allowed. Welding to the block shall be for rod damage repair only, and may not be a functional modification or a performance enhancement.

10.3.C.5 Exhaust System: Any single stage, one piece header made from .750” O.D. Steel tubing with a maximum I.D. Dimension of .635” allowed. Must have a Briggs #89966 tube type muffer or it's aftermarket equivalent installed at the end of header. Muffler may be welded to header or threaded into a welded on coupler. Header must have a minimum length of 10”, maximum length of 14”, INLUDING MUFFLER! To be measured from engine mounting flange to tip of muffler, following along the outside radius of the longest bend. Muffler must remain stock as produced. Tack welds to prevent “shell” from blowing apart are permitted. Header MUST be heat wrapped from flange to start of muffler. Muffler MAY NOT be wrapped. Brackets to reduce vibration/breakage permitted. Any aspect of the exhaust not compliant will result in disqualification with the following exception: The “baffle plug” located halfway inside the muffler exit has been know to blow out during a race. If a muffler is found with this missing PRIOR to a race, that kart will not be allowed to start that event. If found post-race, that car will be penalized to last place in that event.

10.3.C.6 Carburetor: Huayi type carb only. Choke assembly must be in place and functional, but may be fastened in the open position. Choke bore .810” dia max, venturi .615” max and throttle bore .751” max. NO MACHINING OF CARB BORE. Main metering jet, idle jet, and emulsion tube are non-tech. (Since the amount of air flow is controlled as well as the fuel teching the jets are unnecessary). Throttle linkage non tech.

10.3.C.7 Aftermarket air filter adapter allowed. Maximum length 1.375”. Air filter design non tech.  May use filter oil.  No exotic chemicals to enhance performance.

10.3.C.8 Fuel Tank: Non Tech. (It is recommended that for safety reasons remote/floor mounted tanks be used.) Any pulse type fuel pump permitted and can be pulsed from the crankcase, side cover or valve cover.

10.3.C.8 Fuel: 93 Octane (max) Pump Gas

10.3.C.9 Connecting Rods: OEM cast rods only. No modifications allowed.

10.3.C.10 Pistons: OEM Std bore, 2.685” max. Three ring design and all rings to be intact and functional.

10.3.C.11 Crankshaft: Standard OEM item with stock stroke length of 54mm or 2.123” (plus or minus .005"). Crankshaft journal diameter is 1.180”, 1.175” minimum. Stock stroke length of 54mm or 2.123” (plus or minus .005"). Machining, polishing, addition of material, or other alterations prohibited. Stock factory timing gear mandatory and must be installed in original location.

10.3.C.12 Flywheel and Ignition Coil: OEM stock/unaltered flywheels and plastic fins only. No machining allowed. Stock flywheel key only, and must be installed. Plastic fins must be intact and have their full depth. Minimum (bare) flywheel weight is 5.0 lbs.

10.3.C.13 Cylinder Head: OEM heads only with no modifications allowed. Valve seats to be a single 45° only with a top angle relief of 30°. No porting, grinding or matching allowed to the ports or combustion chamber. Spark plug to be 14mm X .75 reach only. Minimum combustion chamber volume when mounted on engine @ TDC is 26.5 cc's. This is to be done after the event and when the engine has cooled down to a reasonable temperature. Head gasket to be .010” minimum thickness and can be either steel or aluminum.  Thicker head gaskets, or multiple head gaskets, are allowed.

10.3.C.14 Valve Train: OEM push rods, push rod guide plates, retainers, springs, keepers, rocker arms and adjusters only. OEM valves with 45° seat angle only and no lightening or polishing. Stock 1:1 ratio OEM rocker arms only. OEM valve springs only with a maximum spring diameter of .798” (wire diameter .073” max) and a maximum tension of 10.8 lbs at installed height of .850”.

10.3.C.16 Fasteners: Non-tech, but must retain their original factory size. Heli-coils, studs, etc allowed for repair purposes.

10.3.C.17 Gaskets & Sealer: Gaskets are non-tech and sealer may be applied unless otherwise specified.

10.3.C.18 Bearings: Crankshaft bearings shall be of metallic (magnetic steel) construction (excluding retainers) and be of conventional design and the same dimensions as the OEM bearings. This includes inner and outer races as well as the balls and rollers. No other materials allowed.

10.3.C.19 Coatings: Internal performance coatings of any type not allowed.

10.3.C.20 Crankcase breathers are to be routed internally through the valve cover as originally intended in OEM configuration. No additional breathers allowed.

10.3.C.21 Pull Starter: The pull starter is non tech and optional. It may be removed to allow the use of an auxiliary (hand held) starter or different brands of pull starters can be used from any of the approved engines. If the OEM starter is not used, a guard must be in place on the flywheel housing to prevent fingers or debris from entering the flywheel area.

10.3.C.22 Clone Claimer Rule:  Any clone racer may claim any other racer's engine IN THE SAME DIVISION.  A driver may only claim ONE engine per night.  A racer may NOT claim the same driver's engine more than once per season.  The claimer fee is $175.  The claimed engine WILL be torn down and inspected for legality.  $150 will go to the owner of the claimed engine.  $25 will go to the track for the time in doing so.  Whether the engine is legal or not, the CLAIMER OWNS IT AND IT WILL BE GIVEN TO HIM IN A DISASSEMBLED STATE THE $150 WILL GO TO THE CLAIMEE, legal or not!  If the engine is illegal, the claimee will be disqualified and will lose all points and awards for that date's events.  That driver will also be fined 50 points in the standings.  Refusal to comply with a claim will result in loss of all points accumulated to that date and permanent suspension from any clone division.  Claim only includes the long block.  Items NOT included are header, air filter adapter, chain gaurd, clutch, top plate, throttle linkage, fuel pump, motor mount, starter nut if equipped for electric starter.

10.3.C.23 Any questionable parts may be compared to a known stock part. When performing a comparison check, a tolerance of +/- .005” will be used.

10.3.C.24 Any part found to be illegal may be confiscated indefinitely by the track at the tracks discretion. Any part deemed questionable may be confiscated by the track in exchange for a NEW part to be provided by the track.

10.3.C.25 Clutch: Stamped steel drum type clutch only. Two shoes maximum. No machined drums. Parts must remain as produced, no machining. Springs may be changed to adjust engagement. NO DISC CLUTCHES.

10.3.C.26 Gear Rule: Sportsman Divisions (SK, SW, SM) must run a 14 tooth clutch, 61 tooth axle gear. This may be adjusted once the season begins after monitoring the RPM's turned. Any change to the gear rule will be announced one week before becoming effective. Uncaged clone division will have no gear rule.

10.4 JR./SR. SLINGSHOTS

All Speedway Entertainment Slingshot rules apply unless exception is listed.

10.4.A Jr. Slingshot must run 1 bbl. Carb.

10.4.B Jr. Slingshot ages are 8 thru 13

10.4.C Older body styles may still be run provided it is a past SE body. NO CUSTOM OR HOME MADE BODIES!

10.4.C.1 Body must be 2005 style or newer for all SE Tour Events.

10.5 270cc Microsprints

10.5.1 All cars should be constructed to look like microsprints. All cars must be equipped with complete body panels (hood, tail, side panels, belly pan, etc.)

10.5.2 Roll cages must be constructed of 4130 chrome moly tubing. Minimum diameter 1 ¼” OD, .065” wall thickness OR 1” OD .083” wall thickness.

10.5.3 Belly pan must extend from the front of the seat to the nose of the car.

10.5.4 All steering and suspension parts that are bolted together must use locking nuts, safety wire, or cotter pins.

10.5.5 All cars must be equipped with nerf bars extending to at least the inside edge of the front tire and middle of the rear tire. May not extend beyond the outside of the tread width of any tire.

10.5.6 No centrifugal clutches or belt drives.

10.5.7 4 point racing harness mandatory, minimum width of 2 ½”. May not be more than 5 years old as of first race of the season.

10.5.8 With driver seated in car, there must be a minimum of 3” of clearance between the driver’s helmet and the upper roll bar.

10.5.9 Brakes must be of sufficient strength as to stop the wheels in the pits or stop the car while in motion on the track.

10.5.10 Car must be equipped with a fuel shutoff valve and kill switch. Both must be functional, within reach of the driver, and clearly marked.

10.5.11 Sharp pointed objects will not be tolerated.

10.5.12 Radiators should be mounted in a manner that makes it highly unlikely that it will be contacted by another car.

10.5.13 Steering mechanism must be constructed of a minimum of 5/8” rod and 3/8” heims.

10.5.14 Cars must have front and rear bumpers. Rear bumper must be suitable for push start. Track not responsible for car damage due to push starting or pushing/removing from track.

10.5.15 Wheelbase - 56” minimum, 72” maximum.

10.5.16 Overall width - Shall not exceed 59” sidewall to sidewall.

10.5.17 All wheels must be race approved, 8 or 10 inch diameter only.

10.5.18 Engine Specs: Any single cylinder 250cc full production engine. Maximum of 271cc permitted. No forced air induction or fuel injection. Any height compression head is legal. Gas or alcohol only! No additives other than top end lube.

10.5.19 Sprint car type window net RECOMMENDED on left side of the cage.

10.5.20 Torque arm must be secured by a minimum ¼” cable or chain, or other reasonable safety device.

10.5.21 Welded Spindles must have skid plates

10.5.22 All cars must have a top wing at all times. Must be securely fastened. If damaged during race, car may continue provided it is still reasonably secure. NO CARS WILL RUN WITHOUT TOP WING!

10.5.23 Top wing may not exceed 12 sq. ft. Side panels must not obstruct the view of the driver and cannot extend past the center section by more than 10 inches, front or back. 24” x 54” side panel maximum.

10.5.24 Nose wings allowed. Maximum size 28” x 18”. Must not mount forward of front bumper.

10.5.25 QUIET PIPES ARE REQUESTED IF YOU HAVE ONE! If noise becomes an issue with the township, they will become MANDATORY!

10.5.26 All added weights must be painted white with car number clearly marked on it. Weights must be securely fastened with locknuts, double nutted, or must be drilled and secured with a cotter key.

10.5.27 A 450cc 4-Stroke engine may compete in the 270cc Microsprint division. All chassis/weight rules will remain the same regardless of engine. May be converted to alcohol. If running gas, MUST have a tank bladder.

10.5.26.A MUST retain stock stroke.

10.5.26.B Boring permitted.

10.5.26.C NO injection. Carb only.

10.5.26.D Clutch may be removed.

10.5.26.E MUST HAVE MUFFLER!

10.5.26.F Racer must have a manual for the engine they are running for informational purposes.

10.5.26.G It is our hope that by allowing the 450's to compete, that we will be better prepared for the future in regards to this division. We reserve the right to make any rule amendments we deem necessary to maintain a level playing field.

10.6 600cc Microsprints

10.6.1 All cars should be constructed to look like microsprints. All cars must be equipped with complete body panels (hood, tail, side panels, belly pan, etc.)

10.6.2 Roll cages must be of a 6 point design. Main cage must be 1.25” tubing (.065” wall if using chrome moly, .120” wall if using mild steel). All bends must be made of a 3” minimum radius (no square or pointed corners allowed).

10.6.3 Kill Switch – MANDATORY, must be within reach of driver. Preferred location is on the right side of dash. Should be visible to safety crews and clearly labeled.

10.6.4 Belly pan must extend from the front of the seat to the nose of the car.

10.6.5 Must be equipped with fuel cell or tail tank. Fuel bladder or sprint type fuel cell HIGHLY RECOMMENDED. Sprint type fuel cell at a MINIMUM will be required in 2011. Must be fully protected and securely mounted. Must be separate from the drivers compartment. No pressurized fuel systems.

10.6.7 All steering and suspension parts that are bolted together must use locking nuts, safety wire, or cotter pins.

10.6.8 All cars must be equipped with nerf bars extending to at least the inside edge of the front tire and middle of the rear tire. May not extend beyond the outside of the tread width of any tire. Minimum diameter ¾” O.D., .065” wall mild steel. No sharp or pointed edges.

10.6.9 Bumpers – Must be present front and rear. Must be securely attached and suitable for towing. Width may not extend past outside of main frame rail

10.6.10 Must be chain drive. No centrifugal clutches or belt drives. No shaft drive.

10.6.11 5 point racing harness mandatory, minimum width of 2 ½”. May not be more than 5 years old as of first race of the season.

10.6.12 With driver seated in car, the driver’s helmet may not be higher than the bottom of the upper roll bar.

10.6.13 Brakes must be of hydraulic type and sufficient strength as to stop the wheels in the pits or stop the car while in motion on the track. Must have brakes on the rear axle. Front wheel brakes optional.

10.6.14 Car must be equipped with a fuel shutoff valve and kill switch. Both must be functional, within reach of the driver, and clearly marked.

10.6.15 Throttle must be foot operated. Return strap highly recommended. 10.6.16 NO electronic traction control devices permitted.

10.6.17 Radiators/oil coolers should be mounted in a manner that makes it highly unlikely that it will be contacted by another car. May NOT be mounted in drivers compartment.

10.6.18 No sail panels allowed on any part of car, including sidebars. “A” panels may not protrude more than 2 inches behind rear down tubes. 10.6.19 Sides of chassis must have panels installed. Must have sprint type tail tank. Must run sprint or modified style hood.

10.6.20 Screen over windshield area highly recommended.

10.6.21 Suspension on all 4 wheels. May be of coil over, torsion bar, or leaf spring design.

10.6.22 Steering mechanism must be constructed of a minimum of 5/8” rod and 3/8” heims. Steering wheel hub must be of quick release or pin style.

10.6.23 All radius tubes should be a minimum of 9/16” diameter with a wall thickness of .120”.

10.6.24 Wheelbase - 50” minimum, 72” maximum.

10.6.25 Overall width - Shall remain between 58”-65” sidewall to sidewall. 10.6.26 All wheels must be race approved, 10 inch diameter only. Steel, aluminum, or carbon fiber wheels are acceptable. Beadlocks recommended.

10.6.27 One piece live rear axle only. No quickchange or differential type rear ends. No accessories (hubs, sprocket, etc.) may be welded to the axle. Nut or snap ring must be present at end of axle to prevent wheels from coming off.

10.6.28 A firewall must separate driver from engine compartment.

10.6.29 All bolts should be grade 5 minimum and should use locknuts, lock washers, or be safety wired or cotter keyed.

10.6.30 Sprint car type window net RECOMMENDED on left side of the cage.

10.6.31 Torque arm must be secured by a minimum ¼” cable or chain, or other reasonable safety device.

10.6.32 All cars must have a top wing at all times. Must be securely fastened. If damaged during race, car may continue provided it is still reasonable secure. NO CARS WILL RUN WITHOUT TOP WING!

Top wing may not exceed 16 sq. ft., 48” long x 48” wide maximum. Side panels must not obstruct the view of the driver. 22” tall, 56” long right side board maximum (may taper down at front). 28” tall x 56” long left side board maximum. Wing sliders permitted.

10.6.33 Nose wings allowed. Maximum size 28” x 18”. Must not mount forward of front bumper.

10.6.34 Wet cell battery mounted in the cockpit must be covered and vented.

10.6.35 All added weights must be painted white with car number clearly marked on it. Weights must be securely fastened with locknuts, or must be drilled and secured with a cotter key.

Engine Rules: WVMP will be running under the 600cc Micro Sprint Universal Engine Rules as follows:

600cc Micro Sprint Universal Engine Rules

1. Terms and conditions

a) Internal Stock parts – must use stock original manufacturer parts for the particular year and

make engine, these parts can not be modified except where noted, if the rules do not state

that you can do it, you can not do it. No mixing of parts from different year and make

engines, even if made by the same manufacturer. Non stock or modified stock external bolt

on parts may be used (example: billet oil pan, starter, water pump cover, oil cooler, pipes,

valve covers, etc.)

2. Overall Engine

a) Must be a Production Motorcycle Engine, 4 cylinders, 4 stroke. No limited production race

motors allowed, only US street legal bike motors are allowed.

b) Current year engines allowed

c) No Titanium anywhere in or on the engine, unless it comes stock form manufacturer of engine

on the production bike

d) Must have engine, clutch, and transmission all in one unit

e) Must be Chain Drive

f) Manual cam chain tensioners are allowed.

3. Bore and stroke

a) 600cc Maximum for engine model that was new in 2006 and up. Other engines are 637cc

maximum. Engine model is defined as a manufacturer redesign of overall engine. See

Specification list.

b) Standard Stroke only (no strokers)

4. Head and cams

a) NO PORTING or Blending the bowls.

b) Valve jobs, valve grinding, valve seating, valve seal modification and valve seat cutting are

allowed.

c) Valve seat inserts may be reworked or replaced with any seat of original dimensions. Any

dimensional thickness of the stock inserts may not be increased. Valve seats can be ground

with multiple angles. Blending of the valve seat into the head is permitted but cannot extend

more than ¼” into the aluminum head measured from where the seat meets the head.

d) Cams do not need to be stock, but the lift must be no greater than stock. (duration is open)

e) Cam timing may be adjustable

f) May use any valves (no titanium), but they may be no larger than stock valves.

g) Head may be resurfaced

h) Any head gasket may be used

5. Pistons

a) Any piston, piston rings, and wrist pin, may be used, must be within cc limit specified under

bore and stroke.

b) After market coatings are allowed on pistons only.

6. Bottom End

a) No machining to remove weight from the crank (no after-market cranks) (no lightweight

cranks)

b) The stock unmodified connecting rods must be used (no after-market rods)

c) Aftermarket rod bolts may be used

d) Modifications to oil pump system, oil pick up and oil passages are allowed

e) No dry sump systems are allowed unless it comes from the motorcycle manufacturer as

original equipment.

7. Clutch/Transmission

a) The clutch does not need to remain stock, but must remain operable

b) Transmission gears must be stock, no close-ratio gears or nonstandard gear-ratios

c) All gears must remain in transmission, no removing any gears. No lightweight or modified

stock gears.

8. Ignition

a) Stock Rev Limiter must remain intact at all times (ex: no switched or gear specific limiters).

No hot ECU boxes, no physically modified ECU boxes. Factory race boxes are ok, but must

have the rev limit set to the street bike stock rev limit. If a computer is hooked up to check

the ECU it must be set to factory stock specifications, no tolerance. See specifications list for

RPM limits.

b) All cars must have the PA standard connector for the track to check engine rpm rev limit.

These are available from the chassis manufactures and engine builders, and at the track. All

cars must leave intact the rpm wire coming from the ECU.

c) Stock appearing ignition must be used (no after-market ignition systems, factory race ignitions

are ok) may use different year ignitions from same manufacturer as long as stock rev limit of

engine (not ignition) is retained.

d) No aftermarket coils

e) Engines that came with stock fuel injection may use an after-market add on components

(example: Power Commander, Dim Sport) to adjust the fuel curve and/or timing (essentially

the same as adjusting jetting and using an ignition advancer).

f) Ignition advancers may be used

g) No gear position sensor may be used. The sensor may be in place on the engine, but can not

have any wires connected to it. Gear position wire from ECU may not be switchable.

h) No traction control device.

i) Only one ECU box present in or on car.

j) A 350 rpm over rev tolerance for the purpose of tech inspection is acceptable. (Note: this

does not mean you can turn up the rpms in any ECU by any amount, this is information for

the tech inspector only)

9. Induction system

a) No mechanically forced induction (turbo charging, supercharging)

b) Any carburetors may be used on any engine, regardless of year of engine.

c) If the engine did not come from the factory with fuel injection, fuel injection may not be used.

d) If the engine came with factory fuel injection, the fuel injection may be used and may be

converted for use with alcohol. The stock fuel injection throttle bodies must remain, but may

be modified for use with alcohol. Any number of injectors may be used regardless of stock

number of injectors.

10. Exhaust

a) Any exhaust may be used, as long as there is a muffler included with the system that will

keep noise levels within individual track limits.

11. Charging system

a) The stock original factory charging system may not be removed, and must remain in complete

working order. No factory racing charging systems.

b) Flywheels can be modified.

12. Self Starting

a) The engine must self-start at the beginning of the event. If it does not self-start, the car may

be pushed off and must start at the rear of the event as the penalty.

13. Fuel

a) Only alcohol, gasoline, and/or top lube may be used. Non flammable top lube only, no exotic

fuel additives, no oxidizers, no fuel enhancer top lube.

b) Fuel tanks must contain a bladder. A fuel tank with a bladder is further defined as a plastic

outer shell with a rubber inner container.

14. Minimum weight

a) Minimum weight at all times is 775 pounds, car and driver. If weight is added it must be firmly

bolted in place.

U6SA Page 2 of 2 Issue Date: 10/10/2009

CLARIFICATIONS

These decisions are made by the U6SA clarification committee, Glen Lewis (head), Kenny Miller, Randy Brookens, and Rick Stief. You can email claification requests to Glen Lewis Lewis.glenn@verizon.net

1. Valve spring spacers are allowed to be used. Generally these are added to increase valve seat pressure.

2. Valve guides cannot be replaced with after market valve guides. Although the stock ones can be modified, you must start with a stock guide.

3. Valve guides may have a 7 angle grind or any grind on them, the stock dimension rule on valve seats applies to the thickness of the seat, not the grind.

4. Mechanical injection is legal on an engine that came with electronic fuel injection. All other rules still apply to that system, ie: "Stock appearing ignition must be used" , and "The stock fuel injection throttle bodies must remain".

Engine Model Year Rev Limit Tach Wire Color
Kawasaki ZX-6R,
ZX-6RR 03-04 14,400 Light/Blue
Kawasaki ZX-6R
ZX-6RR 05-06 14,800 Light/Blue
**Kawasaki ZX-6R 07 15,000 Light/Blue
Yamaha R6 03-05 15,500 Yellow/Black
Yamaha R6S 06-07 15,500 Yellow/Black same engine as 03-05 R6
**Yamaha R6 06-07 16,000 Yellow/Black
Suzuki GSXR 04-05 14,600 Yellow/Blue
**Suzuki GSXR 06-07 15,000 Yellow/Blue
Honda CBR F1-F3 90-98 13,200 Yellow/Green
Honda CBR F4 99-04 13,900 Yellow/Green
Honda CBR RR 05-06 15,000 Yellow/Green
**Honda CBR RR 07 15,500 Yellow/Green

**= Must be 600cc