Quadracers

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Now offering FSA/MMAD stainless steel OOF drag exhaust for 04/05 TRX. When it comes to drag racing, power is everything, and nothing makes more power than this system! 695.00 shipped - 250.00 deposit to reserve your pipe. paypal as gift or add 3.15% to: Tom@fourstrokeassociation.com http://www.offtopic.forum/uploads/imported/2012/06/IMG_3332-1.jpg http://www.offtopic.forum/uploads/imported/2012/06/IMG_3334-1.jpg http://www.offtopic.forum/uploads/imported/2012/06/IMG_2765-1.jpg

NEW 74.8mm (+10) Falicon Supercrank, Micro Blued with Falicon knife rod for 04/05 TRX $1,295.00 shipped http://www.offtopic.forum/uploads/imported/2012/05/quadphotos002-1.jpg

We have a 91 octane pump fuel entry level Duner class and E85 is a "pump fuel" that provides a performance advantage due to it's alcohol content.

No we will not. M1 Methanol is already an approved fuel if someone chooses to run alcohol.

understandable.......lol

That's correct.

FSA 2012 schedule Dumont California - November 12th, 2011 Glamis California - Jan. 21st, 2012 Dumont California - March 17th, 2012 SM Nevada - September 22nd, 2012 Dumont California - November 10th, 2012

AWARDS SYSTEM The Four Stroke Association awards system will be comprised of 2 different award levels. At the individual race level, achievement will be recognized for the first and second place finishers in each race, along with a small bore and big bore gas champion being recognized and competing for the King of the event. The King of the Event award will be a final race of the top fuel finishers from the small bore and big bore gas champion racing categories and the first place winners from the small/big bore Open classes. The second level of recognition will be for the series winners. Series winners will be recognized in all designated classes. Championship points are based on a 5 race series and will be awarded on a graduated basis and accumulated. The lowest score will be dropped and largest combined score will designate the series winners. FSA will be awarding a "BUILDER OF THE YEAR" award to the top shop/builder that sponsors the winning series championship bike in the Under 650 Builders and Over 650 Builder classes. POSITION POINTS Final 1st 30 Final 2nd 25 Semifinal 15 Quarterfinal 10 Preliminary 5 FSA APPROVED FUEL LIST VP Fuel ONLY VP-110 Purple C-12 Green C-14 Yellow C-16 Blue MR-9 Clear MR-12 Purple MRX01 Pink Q16 - Yellow U4.4 - Lite green M1 methanol 87 - 91 pump gas (E85 is illegal) Disclaimer: It is strictly prohibited by law to copy or re-publish FSA rules or classes on any other website without first obtaining written consent from Four Stroke Association Inc.. It is also prohibited by law to manipulate FSA rules/classes in any way. If you wish to distribute a copy of the FSA rules/classes, simply link directly to the website or contact us through email for a printed copy.

CLASSES • PRO DIVISION & SPORTSMAN DIVISION – two groups for each class listed below. Under 650cc: 400 – 650 cc (Small Bore) - Over 650cc: 650 cc + (Big Bore) PRO DIVISION - Under 650cc and Over 650cc * Stock Bore/Stroke Class – OEM chassis, OEM modified motors with OEM bore/stroke running gas only- see approved FSA gas list. No weight limit, front nose/plastic required. Under 650 cc stock bore/stroke requirements • YFZ450 - 95 x 62 • YFZ450 - 95 x 63.4 • TRX400EX - 85 x 70 • TRX450R - 94 x 64.8 • TRX450R - 96 x 62 • LTZ400 - 90 x 62.6 • LT-R450 - 95.5 x 62.8 • KFX450R - 96 x 62.1 • DS450 - 97 x 60 • KTM 450XC - 89 x 72 • KTM 525XC - 95 x 72 (not eligible for stock bore/stroke class) • Predator 500 - 99.2 x 64.6 • Outlaw 450MXR - 89 x 72 • Outlaw 500 - 99 x 64.8 • Outlaw 525 - 95 x 72 (not eligible for stock bore/stroke class) Over 650 cc stock bore/stroke requirements • DS650 - 100 x 83 • Raptor - 660 100 x 84 • Raptor - 700 102 x 84 • KFX700 - 82 x 66 (X2) • TRX 700XX - 102 x 84 * Under 650 Builders Class – OEM chassis, OEM modified motors running only VP C14 race fuel provided by FSA. Bikes must report to the tech trailer empty. No weight limit, front nose/plastic required. * Over 650 Builders Class – OEM chassis, OEM modified motors running only VP C14 race fuel provided by FSA. Bikes must report to the tech trailer empty. No weight limit, front nose/plastic required. * Under 650 Modified Class – OEM chassis, OEM modified motors running VP gas or M1 methanol - see approved FSA fuel list below. No weight limit, front nose/plastic required. * Over 650 Modified Class – OEM chassis, OEM modified motors running VP gas or M1 methanol - see approved FSA fuel list below. No weight limit, front nose/plastic required. * Under 650 Open Class – OEM chassis, OEM modified motors running nitro methane, nitrous, super charger or turbo. No weight limit, front nose/plastic required. * Over 650 Open Class – OEM chassis, OEM modified motors running nitro methane, nitrous, super charger or turbo. No weight limit, front nose/plastic required. SPORTSMAN DIVISION * 0 - 505 Class – 0 - 505cc, OEM chassis, OEM modified motors running approved gas (see approved fuel list below), in frame exhaust with baffle in silencer, coil over shocks, OEM a arms or steel after market + arms, 54.5" wheelbase limit, OEM axle or steel after market axle, front and rear brakes, all plastic with cut fenders allowed, (no light weight wheels or spindle mounts allowed) minimum combined weight of 505 lbs. No light weight drag parts allowed. Owner/Rider only class, no jockeys allowed. * 650 - 735 Class – 650 - 735cc, OEM chassis, OEM modified motors running approved gas (see approved fuel list below), in frame exhaust with baffle in silencer, coil over shocks, OEM a arms or steel after market + arms, 54.5" wheelbase limit, OEM axle or steel after market axle, front and rear brakes, all plastic with cut fenders allowed, (no light weight wheels or spindle mounts allowed) minimum combined weight of 550 lbs. No light weight drag parts allowed. Owner/Rider only class, no jockeys allowed. * Under 650 Duners Class – OEM chassis, OEM modified motors running approved FSA 91 octane or below pump gas, in frame exhaust with baffle in silencer, coil over shocks, OEM a arms or steel after market + arms, 54.5" wheelbase limit, OEM axle or steel after market axle, front and rear brakes, all plastic with cut fenders allowed, (no light weight wheels or spindle mounts allowed), minimum combined weight of 505 lbs. No light weight drag parts allowed. Owner/Rider only class, no jockeys allowed. * Over 650 Duners Class – OEM chassis, OEM modified motors running approved FSA 91 octane or below pump gas, in frame exhaust with baffle in silencer, coil over shocks, OEM a arms or steel after market + arms, 54.5" wheelbase limit, OEM axle or steel after market axle, front and rear brakes, all plastic with cut fenders allowed, (no light weight wheels or spindle mounts allowed), minimum combined weight of 550 lbs. No light weight drag parts allowed. Owner/Rider only class, no jockeys allowed. * Under 650 Shooters Class – OEM chassis, OEM modified motors running on approved FSA gas (see approved fuel list below), working front/rear brakes, in frame exhaust system with baffled silencer, 56.5" wheelbase, 505 lb. minimum combined weight, light weight parts allowed, no overridden transmissions, front nose/plastic required. Owner/Rider only class, no jockeys allowed. * Over 650 Shooters Class – OEM chassis, OEM modified motors running on approved FSA gas (see approved fuel list below), working front/rear brakes, in frame exhaust system with baffled silencer, 58.5" wheelbase, 550 lb. minimum combined weight, light weight parts allowed, no overridden transmissions, front nose/plastic required. Owner/Rider only class, no jockeys allowed. * Under 650 Pro Class – OEM chassis, OEM modified motors running VP gas or M1 methanol fuel - see approved FSA fuel list below, front nose/plastic required. (Under 650 min. combined weight 420 lbs.) Owner/Rider only class, no jockeys allowed. * Over 650 Pro Class – OEM chassis, OEM modified motors running VP gas or M1 methanol fuel - see approved FSA fuel list below, front nose/plastic required. (Over 650 min. combined weight 480 lbs.) Owner/Rider only class, no jockeys allowed. * Under 650 Sumo Class – riders over 225 lbs. + - OEM chassis, OEM modified motors running gas only – see approved FSA gas list below (M1 Methanol is illegal). Front plastic required. Owner/Rider only class, no jockeys allowed. * Over 650 Sumo Class – riders over 225 lbs. + - OEM chassis, OEM modified motors running gas only – see approved FSA gas list below (M1 Methanol is illegal). Front plastic required. Owner/Rider only class, no jockeys allowed. * Unlimited/Chassis Class - modified OEM frame or after market frame 4 stroke single or multi-cylinder engine, any fuel or power adder. * Fastest MPH Class - modified single or multi-cylinder 4 stroke motor with OEM or after market chassis. Any approved fuel, N2O, nitro, turbo, or super charger allowed. * Notes – all classes must use OEM frames, OEM motor except for the Chassis/Unlimited class. * Hybrid ATV’s – are defined as an OEM frame with same make engine being used from a dirt bike. Approved Hybrids are: CRF engines in OEM TRX chassis. YZ engines in OEM YFZ chassis. *Inbrid ATVs - are defined as an OEM frame and OEM motor with different year parts on it, but the same make and model. No motorcycle cylinder heads on quad bottom ends. Approved Inbrids are: Raptor 660 bottom ends with 700 cylinder heads mounted in OEM chassis. 04/05 TRX bottom end with 06 or newer TRX cylinder head mounted in OEM chassis. 04/05 YFZ bottom end with 06 or newer YFZ/YFZR cylinder head mounted in OEM chassis. Champion Classes – by qualification only * Small Bore Gas Champion - winners from 650 and under featured GAS classes face off - best two out of three races. Open class winner automatically advances to KOTH race. * Big Bore Gas Champion - winners from 650 and above featured GAS classes face off - best two out of three races. Open class winner automatically advances to KOTH race. * King Of The Hill – Small bore gas champion and big bore gas champion face off with small bore/big bore Open class winners for overall title (4 bikes) – best two out of three races. * = Series Championship Classes FUEL CHECK * All bikes competing in classes, which require a fuel check, must have a method to provide a fuel sample from the fuel line system. Sample must be able to be taken from line between carburetor and fuel pump or petcock. On fuel injected systems, the sample may be taken from the low-pressure (return) side of the system, between the injectors and the fuel tank return inlet. Use of a “Pingel” Fuel Sampler (item number PFS1) for Lectrons application or (item number PFS2) for Mikuni/Keihin 5/16-inch application, or equivalent to enable sample collection is strongly recommended. * PROPYLENE OXIDE The use of propylene oxide is prohibited in all categories. * RACING GASOLINE Only racing gasoline that appears on the approved FSA list is permitted. No mixing of fuels or additives. All gasoline will be checked against a FSA sample for legality. Racing gasoline is defined for purposes of the Rulebook as a mixture of hydrocarbons only. Racing gasoline is tested and certified at FSA events through the application of various chemical analysis as considered appropriate by fuel check personnel. Gasoline is a good electrical insulator, or dielectric, and its relative effectiveness as an insulator is represented by its Dielectric Constant. The average D.C. for the hydrocarbons which comprise gasoline is 2.025. This is defined as a reading of 0 with the certified FSA fuel meter. FSA maintains a reference book of dielectric readings for approved fuels. Fuel samples must measure within + or – 0.40 of reference book specifications on the certified FSA fuel meter.

FOUR STROKE ASSOCIATION – 2012 Rules GENERAL RULES Driver Rules & Regulations 1) FOR DRIVERS 16 YEARS AND OLDER – to be verified by drivers license or birth certificate. 2) One (1) Driver per Bike - per Class. One (1) Driver entry per class, no switching drivers, no double entries in a class. A substitute rider may enter if the original rider becomes ill or injured at officials discretion. Riders under no circumstances can be switched to gain a competitive advantage. 3) Full Face Helmet with shield or shatter proof goggles. – Standard Sunglasses/Prescription Glasses are not recommended as the only source of protection. 4) Shoes above the ankle such as Boots, High Tops or Hiking shoes. 5) Long Pants required, no sweats. 6) Long Sleeve shirts REQUIRED - Race Jackets / Leathers preferred. 7) Leatt neck protection or comparable is mandatory for these four classes: Under 650 Open/Over 650 Open/Unlimited Chassis/Fastest MPH class participants. 8) NO ALCOHOLIC BEVERAGES allowed in the pits or staging area. NO DRUGS or other ILLEGAL SUBSTANCES shall be permitted on premises. Drivers shall not use any of the substances above before or during the race. Any driver that is impaired will be disqualified and fees will not be returned. 9) Anyone caught cheating and entering their bike in a lower CC class will be disqualified and their fees will not be refunded. Driver and Owner may also be banned from future FSA events. 10) Only 1 number per bike. NO switching number plates on vehicles, doing so will result in disqualification; fees will not be refunded. Participants must compete with the same bike and number for the entire race season for championship points to be awarded. 11) Competitors in each respective cc groupings, under 650cc and over 650cc, have the option of moving up within those class groups. For example: the over 650cc builder racer can sign up for the over 650cc modified or power adder class. Same logic applies for the under 650cc competitor. 12) Point earnings will be applied to the ATV/owner being entered into the series. Frame numbers will be established for all ATV’s. 13) Tech Inspection – will be held immediately following the finals on the top 2 finishers. Do not return to your pit. Proceed to tech inspection upon completing your final race. Not doing so will result in disqualification. All participants must be prepared with replacement parts to assemble motors after random tech inspections. This includes head gaskets at owners expense. Tech can include: Bore and Stroke Fuel Frame density Weight Wheelbase 14) FALSE START (For races without electronic controls or red lights): When the front wheel of an ATV leaves the starting line before the starter has started the race. This will be called by the line judge on either side of the track. A single false start will eliminate the participant from that race. Two false starts will eliminate the participant from that days event. Example: Preliminary race #1 racer false starts, Preliminary race #2 racer false starts – racer done for day. Each racer is allowed 1 false start during the day. Second false start eliminates racer for that day. 15) Race Start: Each race start will be managed by a starting light system. Details to be reviewed in each drivers meeting. Competitor participants that fail to start or stop running in the staging area will be allowed 120 seconds to fire their engine for a given race. Failure for racers to fire their engines in the designated time frame will result in disqualification. Subsequent race delays will be managed on a case by case basis by the race director. 16) Racer support – each racer will be allowed no more than 2 handlers in the pre-staging and staging areas. Once a racer/bike enters the staging areas fuel cannot be added to the tank unless performed by an race official until tech is completed. Adding air to tires is not allowed. Chain adjustment or other safety maintenance issues can only be performed if approved prior by a race official. Violations of any of the above stated rules will result in disqualification. 17) Race Finish (For races without electronic controls or electronic win lights) : Will be determined by the finish line judges at a designated place on the track. Details to be reviewed in each drivers meeting. Top two (2) finishers must report to the tech trailer immediately following the class final. Exiting the track prior to reporting to tech will result in disqualification. 18) Protests: Protests can only be made by registered contestants in a given race. Protests must be filed with the Event Director within 30 minutes of the event results. Protests will be accepted based on completing the protest form in writing and tendering a protest fee of $200. Official’s protests may be entered at any time during the event at no charge by the proper officials. Each protest must specify the violation of FSA rules, procedures, or race result, which is alleged and must be accompanied with a protest fee of $200. If an inspection or review proves a protested ATV to be out of its proper class, protest fees will be refunded, less expenses, and the non-complaint entry will be subject to such action as the Event Director or Technical Committee may impose, including but not limited to possible disqualifications, fines, suspension and/or revocation of competition privileges for up to 1 year. However, in the case of a protested party found in compliance with the requirements of its class of competition will be entitled to the protest fee. The race Director will not accept verbal protests or protests which are not accompanied by the required fee. FSA reserves the right to inspect, review, or protest participants it determines, in its sole and absolute discretion, is frivolous or intentional abuse of current competition rules, to otherwise gain some unfair competitive advantage. VEHICLES ALLOWED: All Race Vehicles consisting of 4 wheels and 4 Stroke Engines and must have a Motorcycle or ATV Engine. 1) OEM frames and OEM motors required on all Pro Classes – see definitions below. 2) Vehicles must be well constructed and in good condition. FSA officials may at anytime at their discretion deem a vehicle unsafe. 3) MODIFIED OEM MOTOR - Any internal modification to OEM motor designed to increase overall performance: porting, valves, valve springs, cams, piston, BB cylinders, stroker crank when allowed in specified classes. Cases and cylinder heads must be OEM. Billet cases/billet cylinder heads are illegal. 4) CHASSIS • Definition of OEM Chassis * Original Chassis with all mounts and equipment in the OEM position except for the following modifications only: - Frame straps across the front of TRX450R. - Relocation of radiator (must be approved by FSA prior) - Relocation of oil reservoir tank (must be approved by FSA prior) - Battery relocation within frame. - Removal of cable hangers and other brackets not used. - No geometry changes. - No tube replacement. - Smoothing of welds for cosmetic purposes only. - No wheely bars. Definition of OEM Engine * OEM cases only. * OEM cases must appear unmodified externally. * OEM cylinder head SAFETY EQUIPMENT REQUIRED ON ALL VEHICLES. ALL VEHICLES MUST MEET TECH INSPECTION. 1) Vehicles must have working KILL SWITCHES with lanyard attached to driver. 2) Race numbers will be required on all racing ATV’s and will be assigned on a first come first serve basis. Race numbers are to be placed on the front and both sides of the ATV. The minimum number size will be 6” high. All numbers need to be displayed legibly on the appropriate back ground as follows: PRO Division - Plastic white number plate with black 6" numbers Sportsman Division - Plastic black number plate with white 6" numbers 3) NO exterior starting devices allowed. Exterior battery assist or jump OK. 4) NO electronic shifting devices allowed. 5) Any electronic device that is capable of automatically shifting the vehicle is illegal. Manual Air/Electric Shifters are allowed when not used with an automated trigger device. 6) Fully functional rear brakes mandatory. 7) Single titanium A-arms sold through KBR/EKO are allowed in the PRO DIVISION classes only. Single front chromolly A-arms manufactured by Stellar Machine with FSA specifications are approved for all 8 PRO DIVISION classes and the Sportsman Pro class. 8) BALLAST - Ballast is defined as any component attached to any part of the chassis, whose purpose is to add weight to the ATV. 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 ATV, or decreasing structural integrity of the ATV, it is considered ballast). FSA does, however, reserve the right to deem any non-ballast component to be illegal, if its design or weight creates a safety hazard. VIOLATIONS OF ANY OF THE ABOVE STATED RULES WILL RESULT IN DISQUALIFICATION!

"2012" CLASSES PRO DIVISION - $80.00 per class * Stock Bore/Stroke Class – OEM chassis, OEM modified motors with OEM bore/stroke running gas only- see approved FSA gas list. No weight limit, front nose/plastic required. Under 650 cc stock bore/stroke requirements • YFZ450 - 95 x 62 • YFZ450 - 95 x 63.4 • TRX400EX - 85 x 70 • TRX450R - 94 x 64.8 • TRX450R - 96 x 62 • LTZ400 - 90 x 62.6 • LT-R450 - 95.5 x 62.8 • KFX450R - 96 x 62.1 • DS450 - 97 x 60 • KTM 450XC - 89 x 72 • KTM 525XC - 95 x 72 (not eligible for stock bore/stroke class) • Predator 500 - 99.2 x 64.6 • Outlaw 450MXR - 89 x 72 • Outlaw 500 - 99 x 64.8 • Outlaw 525 - 95 x 72 (not eligible for stock bore/stroke class) Over 650 cc stock bore/stroke requirements • DS650 - 100 x 83 • Raptor - 660 100 x 84 • Raptor - 700 102 x 84 • KFX700 - 82 x 66 (X2) • TRX 700XX - 102 x 84 * Under 650 Builders Class – OEM chassis, OEM modified motors running only VP C14 race fuel provided by FSA. Bikes must report to the tech trailer empty. No weight limit, front nose/plastic required. * Over 650 Builders Class – OEM chassis, OEM modified motors running only VP C14 race fuel provided by FSA. Bikes must report to the tech trailer empty. No weight limit, front nose/plastic required. * Under 650 Modified Class – OEM chassis, OEM modified motors running VP gas or M1 methanol - see approved FSA fuel list below. No weight limit, front nose/plastic required. * Over 650 Modified Class – OEM chassis, OEM modified motors running VP gas or M1 methanol - see approved FSA fuel list below. No weight limit, front nose/plastic required. * Under 650 Open Class – OEM chassis, OEM modified motors running nitro methane, nitrous, super charger or turbo. No weight limit, front nose/plastic required. * Over 650 Open Class – OEM chassis, OEM modified motors running nitro methane, nitrous, super charger or turbo. No weight limit, front nose/plastic required. SPORTSMAN DIVISION * 0 - 505 Class – 0 - 505cc, OEM chassis, OEM modified motors running approved gas (see approved fuel list below), in frame exhaust with baffle in silencer, coil over shocks, OEM a arms or steel after market + arms, 54.5" wheelbase limit, OEM axle or steel after market axle, front and rear brakes, all plastic with cut fenders allowed, (no light weight wheels or spindle mounts allowed) minimum combined weight of 505 lbs. No light weight drag parts allowed. Owner/Rider only class, no jockeys allowed. $30.00 * 650 - 735 Class – 650 - 735cc, OEM chassis, OEM modified motors running approved gas (see approved fuel list below), in frame exhaust with baffle in silencer, coil over shocks, OEM a arms or steel after market + arms, 54.5" wheelbase limit, OEM axle or steel after market axle, front and rear brakes, all plastic with cut fenders allowed, (no light weight wheels or spindle mounts allowed) minimum combined weight of 550 lbs. No light weight drag parts allowed. Owner/Rider only class, no jockeys allowed. $30.00 * Under 650 Duners Class – OEM chassis, OEM modified motors running approved FSA 91 octane or below pump gas, in frame exhaust with baffle in silencer, coil over shocks, OEM a arms or steel after market + arms, 54.5" wheelbase limit, OEM axle or steel after market axle, front and rear brakes, all plastic with cut fenders allowed, (no light weight wheels or spindle mounts allowed), minimum combined weight of 505 lbs. No light weight drag parts allowed. Owner/Rider only class, no jockeys allowed. $50.00 * Over 650 Duners Class – OEM chassis, OEM modified motors running approved FSA 91 octane or below pump gas, in frame exhaust with baffle in silencer, coil over shocks, OEM a arms or steel after market + arms, 54.5" wheelbase limit, OEM axle or steel after market axle, front and rear brakes, all plastic with cut fenders allowed, (no light weight wheels or spindle mounts allowed), minimum combined weight of 550 lbs. No light weight drag parts allowed. Owner/Rider only class, no jockeys allowed. $50.00 * Under 650 Shooters Class – OEM chassis, OEM modified motors running on approved FSA gas (see approved fuel list below), working front/rear brakes, in frame exhaust system with baffled silencer, 56.5" wheelbase, 505 lb. minimum combined weight, light weight parts allowed, no overriden transmissions, front nose/plastic required. Owner/Rider only class, no jockeys allowed. $80.00 * Over 650 Shooters Class – OEM chassis, OEM modified motors running on approved FSA gas (see approved fuel list below), working front/rear brakes, in frame exhaust system with baffled silencer, 58.5" wheelbase, 550 lb. minimum combined weight, light weight parts allowed, no overriden transmissions, front nose/plastic required. Owner/Rider only class, no jockeys allowed. $80.00 * Under 650 Pro Class – OEM chassis, OEM modified motors running VP gas or M1 methanol fuel - see approved FSA fuel list below, front nose/plastic required. (Under 650 min. combined weight 420 lbs.) Owner/Rider only class, no jockeys allowed. $80.00 * Over 650 Pro Class – OEM chassis, OEM modified motors running VP gas or M1 methanol fuel - see approved FSA fuel list below, front nose/plastic required. (Over 650 min. combined weight 480 lbs.) Owner/Rider only class, no jockeys allowed. $80.00 * Under 650 Sumo Class – riders over 225 lbs. + - OEM chassis, OEM modified motors running gas only – see approved FSA gas list below (M1 Methanol is illegal). Front plastic required. Owner/Rider only class, no jockeys allowed. $50.00 * Over 650 Sumo Class – riders over 225 lbs. + - OEM chassis, OEM modified motors running gas only – see approved FSA gas list below (M1 Methanol is illegal). Front plastic required. Owner/Rider only class, no jockeys allowed. $50.00 * Unlimited/Chassis Class - modified OEM frame or after market frame 4 stroke single or multi cylinder engine, any fuel or power adder. $50.00 * Fastest MPH Class - modified single or multi-cylinder 4 stroke motor with OEM or after market chassis. Any approved fuel, N2O, nitro, turbo, or super charger allowed. $80.00 * Notes – all classes must use OEM frames, OEM motor except for the Chassis/Unlimited class. * Hybrid ATV’s – are defined as an OEM frame with same make engine being used from a dirt bike. Approved Hybrids are: CRF engines in OEM TRX chassis. YZ engines in OEM YFZ chassis. *Inbrid ATVs - are defined as an OEM frame and OEM motor with different year parts on it, but the same make and model. No motorcycle cylinder heads on quad bottom ends. Approved Inbrids are: Raptor 660 bottom ends with 700 cylinder heads mounted in OEM chassis. 04/05 TRX bottom end with 06 or newer TRX cylinder head mounted in OEM chassis. 04/05 YFZ bottom end with 06 or newer YFZ/YFZR cylinder head mounted in OEM chassis. Champion Classes – by qualification only * Small Bore Gas Champion - winners from 650 and under featured GAS classes face off - best two out of three races. Open class winner automatically advances to KOTH race. * Big Bore Gas Champion - winners from 650 and above featured GAS classes face off - best two out of three races. Open class winner automatically advances to KOTH race. * King Of The Hill – Small bore gas champion and big bore gas champion face off with small bore/big bore Open class winners for overall title (4 bikes) – best two out of three races. * = Series Championship Classes SxS Division 1) Limited SxS OEM Class- Any modified OEM motor (big bore/stroker included) on gas or race gas in OEM chassis, no cc cap. Example: Yamaha Rhino OEM chassis with OEM Rhino motor, Polaris 800 razor. 2) Limited SxS XP 900 OEM Class- Any modified XP 900 OEM motor (big bore/stroker included) on gas or race gas in OEM chassis, no cc cap. 3) Limited SxS OEM Power Adder - Any modified OEM motor with N2O, turbo, or super charger. Example: Razor OEM chassis with OEM Razor motor turbo charged. 4) Limited SxS XP 900 OEM Power Adder - Any modified XP 900 OEM motor with N2O, turbo, or super charger. 5) Unlimited SxS Class - Any after market modified motor on gas, alcohol, nitro, N2O, turbo, super charger or any combination of all. Example: Weber NA motor, Weber motor with turbo/N2O. DISCLAIMER: It is strictly prohibited by law to copy or re-publish FSA rules or classes on any other website without first obtaining written consent from Four Stroke Association Inc.. It is also prohibited by law to manipulate FSA rules/classes in any way. Violaters will be prosecuted to the extent of the law. If you wish to distribute a copy of the FSA rules/classes, simply link directly to the website or contact us through email for a printed copy.