Rules

The Wild Bill Racing Circuit - WBRC

The WBRC-Wild Bill Racing Circuit is an organization for racing vintage single cylinder (one lunger) snowmobiles.    There are four classes in each regular race:  Relic, HR, HD & Enticer.  There are three classes for the Wild Bill 20:  HR, HD, & MOD (Willow River Stock).

RULES:

General rules of racing…

-Tech inspections are mandatory before every race.  You MUST have a working tether switch/cord and brakes.  Inspections will be at starting line before drivers meeting.

-Top three finishers in each class will be teched after the race.

-All racers and participants must accept and respect the officials’ decisions.

-There will be NO alcohol or drug use by drivers or pit crew before or during the race.

-Helmets are required during racing and warm up.  Use of Tech vests is recommended but not mandatory.

-Tether must be mounted on motor or chassis, NOT to handle bars.  Tether must be hooked to the driver at all times while the machine is running.

-A track stand should be shielded to prevent debris flying or the track should be pointed in a safe direction away from people while revving your engine.

-No excessive speed in the pit area.

-No unaccompanied children in the pit area.

-Rubbing and bumping happens, but aggressive driving WILL NOT be tolerated.

-Lap traffic should allow faster traffic time to pass.  Faster traffic should be courteous to lap traffic.

-All general flagging rules apply.  Talk to flagman on race day with any questions.

-NO cutting corners.  The staking lath are not suggestions they mark the inside of the course turns and edge of course on straights.                                                                                                                                                                                                                                                                                         

-Re-fueling MUST take place in the pit area.  If you run out of gas on the course you MUST be towed in and re-fuel.  NO extra gas can be carried on the sled during the race.                                                                    

-The only repairs allowed on the race course during the race are changing spark plugs and changing drive belts.  Spark plugs and drive belts MUST be carried on sled for this to be allowed.  i.e. New spark plugs and drive belts CANNOT be brought out to the sled from the pits.  If the sled isn't carrying new plugs or drive belts it MUST be towed in to the pits and then repaired.  ALL other repairs must be done in the pit area.          

-PITTING & TOW-IN....  -If you are pitting you MUST enter the pit area through the entrance and leave out the exit to start your next lap.  If you are getting towed in or riding a disabled sled into the pits (not completing the entire race course for that lap) you may enter the pits on either end (entrance preferred) as long as it is done safely.  You MUST leave the pit area out the exit and start a new lap.  Leaving the pit area and heading to the transponder antenna WILL result in a black flag for that sled/racer.  You MAY NOT enter the racer parking area with your sled during the race without going through the pit area / racer parking area entrance, (located along the back of the pit area).  Entering the racer parking area with your sled during the race in any other fashion WILL result in a black flag for that sled/racer.  Pit activity will be monitored.        

-If a sled/racer is black flagged or out of the race in any other fashion, that sled MUST be placed back into trailer and not appear back on the course.  The black flagged racer/team MAY NOT ride another sled or join another team for the entirety of the race.  Black flagged racers may spectate, but must not interfere with the race, the racers, or race officials for the entirety of the race.                                                                  

-YOU are responsible for signing up in the right class and lining up on time for the race.

-Smude's new transponder unit will be used for lap counting...  YOU are responsible for putting the correct transponder tags on the correct sled.  If the tags are mixed up it completely messes up the counts.

-YOU are responsible for your pit area cleanliness.

Additional Notes:

-Length of race may be changed on race day due to track conditions.

-Officials reserve the right to make changes before race day.  These changes will be announced before the race.

-Disqualified sleds will forfeit entry fee and points.

-All penalties and disqualifications will be determined and enforced by race officials and must be accepted by participants without question.

-This is for fun and entertainment.  If anyone takes this to seriously I will fart in your general direction.

***In the Pure Stock Relic, Relic, HR, & HD classes no changes or modifications are allowed unless they are specifically allowed by these rules.  If these rules do not SPECIFICALLY ALLOW a change or modification then it MUST be assumed that the change or modification IS NOT ALLOWED.

NEW CLASS!!!

Mild Build Class 

Introduction

Due to the Decline in One Lunger Racing, The purpose for this class is to make it very easy for enthusiasts to enter a race without having to over-engineer a vintage snowmobile. To be able to be competitive at a much lower budget. Running low horsepower motors, giving these motors and other sled brands a purpose for their existence…

General Rules

         -There will be no pre-race tech. Tech will only be done after the race to the top 3 winners. The drivers meeting will happen before the race. 

-All racers and participants must accept and respect the officials’ decisions.

- No Wheeled atvs or side-by-sides past the parking lot.

-Respect the racing property as it is a private area, Please be mindful of that so we don’t lose our privileges for hosting it on this area.

-There will be NO alcohol or drug use by drivers or pit crew before or during the race.

-Helmets are required during racing and warm up. 

- Tethers are not required

-No excessive speed in the pit area.

-No unaccompanied children in the pit area.

-Rubbing and bumping happens, but aggressive driving WILL NOT be tolerated.

-Lapped traffic should allow faster traffic time to pass.  Faster traffic should be courteous to lapped traffic.

-All general flagging rules apply.  Talk to flagmen on race day with any questions.

-No cutting corners.  The staking lath are not suggestions, they mark the inside of the course turns and edge of course on straights.                                                                                                                                                                                                                                                                                        

-Re-fueling MUST take place in the pit area.  If you run out of gas on the course you MUST be towed in and re-fuel.  NO extra gas can be carried on the sled during the race.                                                                          

-PITTING & TOW-IN....  -If you are pitting you MUST enter the pit area through the entrance and leave the exit to start your next lap.  If you are getting towed in or riding a disabled sled into the pits (not completing the entire race course for that lap) you may enter the pits on either end (entrance preferred) as long as it is done safely.  You MUST leave the pit area out the exit and start a new lap.                                                                 

- Lap count will be an old fashion mark on paper, So be patient we will do the best we can.

-YOU are responsible for your pit area cleanliness.

Additional Notes:

-Length of race may be changed on race day due to track conditions.

-Officials reserve the right to make changes before race day.  These changes will be announced before the race.

-All penalties and disqualifications will be determined and enforced by race officials and must be accepted by participants without question.

- DQ’ed sleds entry fee will be forfeited

MIld Build Class rules

DRIVER 

•  Must be 16 years of age or older. 

SNOWMOBILE

• No Arctic Cats or Yamaha SM chassis allowed 

•   The motor must be 16.5 HORSE OR LOWER, that was offered in 1973 or before.

CHASSIS:  1973 & older chassis.  No race model or jackshaft chassis. Must be an original Bogied Suspension Chassis, 1973 or older no converting slides suspension chassis to bogies. I.e. Converting a Polaris slide to Bogies.

• You Can reinforce you chassis

• The chassis must remain the original size, NO shorting.

MOTOR:  16.5 HP or less. You can swap any motor in any chassis ( i.e. you can swap a Hirth in a 1973 John Deere Cyclone 300 chassis or a Rotax in a Yamaha). NO grinding on ports, heads, etc.  NO modifications on any internal parts of the motor.  No decreasing of rotating mass.  Piston MUST remain stock.  Max. overbore is .020 over piston no exceptions.  Motor MUST have points style ignition (No CDI’s).  MUST run OEM fan.  Must run stock OEM rewind. 

-The Polaris 250 motor is NOT allowed. They are 18 Hp. Many people have asked…

Engines that are legal will be listed

• B.S.E 250 16Hp

• CCW 225 12.5hp

• Hirth 82R 246cc 12Hp 

• Hirth 56R 282cc 15Hp

• Hirth 55R 300cc 15Hp

• Hirth 54R 300cc 15Hp

• Hirth 53R 300cc 13Hp

• Hirth 52R 300cc 12.5Hp

• JLO L292 292cc 14.6Hp

• JLO 230 223cc 12.5Hp

• Rotax 250,247 12Hp

• Rotax 300,302 12-15Hp

• Sachs SA280-Sa280A 16Hp

• Solo 206 15.5Hp

• Solo 209 16.5Hp

CLUTCH

• Must be 1973 or older OEM clutches. Must be able to eat Chili or Ramen Noodles out of your Clutch cover lol.

• No Aluminum Polaris clutches allowed

• No Aftermarket Duster/Commit 94c clutch

• You may swap any clutch from any model on any sled. (I.E. running a scorpion clutch on a Rupp or a Skidoo clutch on a SnowJet).

• Clutches have to remain stock.  NO changing to aluminum or lightening any of the stock components of the clutch, besides normal weights and springs.  

• NO decreasing of rotating mass. 

• MUST have a clutch guard.

CARB:  Must run an HR carb (diaphragm type) or Smaller with a HR bolt pattern.

EXHAUST & MUFFLER 

•  1973 or older exhaust. 

• You may run any style of exhaust on any brand you run. 

• MUST be a can style exhaust.  

• MAY be reinforced.  

• NO tuners and no cutting the muffler open.  

• MUST have a straight diameter head pipe if not OEM (2" max. diameter).

BRAKES

• MUST run stock brakes in the original location.  

• NO juice brakes allowed 

Chain Case

• Must run 1973 or older original style chain case 

• No Jackshafts

Suspension

• Must run original brand suspension, drive sprockets and rear idler assemblies for that brand of snowmobile I.E. no converting a Yamaha to a Skiroule bogie system or Rupp to a Ski Whiz.

• You may run OEM aftermarket drive sprockets and wheels if needed. 

TRACK 

• Minimum of 114 inches

• MUST be original or OEM stock replacement.  

• NO conversions (cleat to rubber, rubber to cleat, bogie to slide, etc.). 

• NO TRACTION PRODUCTS

SKIS

• MUST be OEM replacement 26in leaf style ski’s

• Elan’s may run their stock style ski’s and leaf springs, nothing else.

• NO ski skins or any plastic on the bottom of skis.  

• NO aluminum skis.  

• Ski spreaders allowed.  Maximum width 2" (Center of spindle shaft to center of ski spring.)  

• Carbides allowed (Max. height 11/16" from bottom of ski) 4in. Or less .  

• Hydraulic style shocks only.

•  NO Gas Shocks on ski’s  

•  The diameter of the spindle may NOT exceed the diameter of the original spindle race.  

• Spindle race MUST remain in the stock location at the stock angle.  (i.e. The spindle race may NOT be cut off to widen the ski stance or change the angle that the spindle rides.)

FUEL TANK

•  MUST be original or OEM stock replacement in the stock location 

•  NO secondary tanks of any kind allowed. 

•  MUST use non-ethanol gasoline 91 or under octane pump gas 

•  No E-85, alcohol, nitro-methane, or other fuels and additives allowed.

Snowflaps

• They are optional not a must, If you want a wet ass be our guest. 

HANDLE BARS

• MUST use stock bars 1973 & older.  

• MAY bend and reinforce stock bars. 

•  Hooks allowed.

HOOD

•  Need not be original (Experiment! Lets see your art work ). 

•  MUST have at least 5” visible numbers on each side of the hood. 

SEAT

• MAY run a seat to your comfort. A loaf of sourdough bread for all we care. 

YOU MAY  

• Change gear ratio

•  The running boards must remain original but you may remove the stirrups.

•  Chassis, skis, handlebars, and exhaust may be reinforced.

WBRC PURE STOCK CLASS: 

The purpose of this class is to allow original factory stock sleds to compete in a class of their own.

DRIVER:  Must be 16 years of age or older.

SNOWMOBILE:  Must be production line model with fan cooled single cylinder motor that was offered in 1973 or before. 

CHASSIS:  1973 & older chassis.  No race model or jackshaft chassis.   Panther chassis only for Arctic Cat riders.  No Yamaha or John Deere sleds. Motor MUST match chassis, NOT chassis type.  (i.e. Hirth 192R & Sachs sa370 only came in 1969 Panthers) 

MOTOR:  Motors NOT allowed:  Yamaha, Kawasaki, Hirth 194R, Sachs sa290C, sa290SS, sa290R, sa320, sa340SS, sa340C, sa340 chrome bore, sa340SS chrome bore, sa340R, sa400, 250 Polaris, JLO 290R, JLO 340R, Rotax 292 TNT, Rotax 340 TNT.  Motor MUST remain stock.  NO grinding on ports, head, etc.  NO modifications on any internal parts of motor.  No decreasing of rotating mass.  Piston MUST remain stock.  Max. overbore of .060”.  Motor MUST have points style ignition (No CDI’s).  MUST run OEM fan.  Must run stock OEM rewind.

CLUTCH:  Original, Comet 94c Duster, or Power Block.  Clutches have to remain stock.  NO changing to aluminum or lightening any of the stock components of the clutch, besides normal weights and springs.  NO decreasing of rotating mass.  MUST have clutch guard.

CARB:  MUST run an HR carb (diaphragm type).  Must be of the original brand and size for that snowmobile.

EXHAUST & MUFFLER:  Original or stock replacement.  Exhaust MUST match brand of sled.  MUST be a can style exhaust.  MAY be reinforced.  NO tuners and no cutting the muffler open.  MUST have straight diameter head pipe if not OEM (2" max. diameter).

BRAKES:  MUST run stock brakes in original location.  NO juice brakes.  (There are other classes that allow that.)

TRACK:  MUST be original or OEM stock replacement.  NO conversions (cleat to rubber, rubber to cleat, bogie to slide, etc.).  NO cutting of cleats.  Traction products allowed.  Must be ½” or less above highest point of track.

SKIS:  MUST be original or stock replacement (brand specific).  NO ski skins or any plastic on bottom of skis.  NO aluminum skis.  Ski spreaders allowed.  Maximum width 2.5" (Center of spindle shaft to center of ski spring.)  Carbides allowed (Max. height 11/16" from bottom of ski).  NO aftermarket shocks allowed.  MAY use billet spindles.  Diameter of spindle may NOT exceed the diameter of the original spindle race.  Spindle race MUST remain in the stock location at the stock angle.  (i.e. The spindle race may NOT be cut off to widen the ski stance or change the angle that the spindle rides.)

FUEL TANK:  MUST be original or OEM stock replacement in original location.  NO secondary tanks of any kind allowed.  MUST use non-ethanol gasoline (91+ octane) and race gasoline only.  No E-85, alcohol, nitro-methane, or other fuels and additives allowed.

SNOW FLAP:  MUST run snow flap of any kind.  MUST be within 2” of ice when rider is sitting.

HANDLE BARS:  MUST use stock bars 1973 & older.  MAY bend and reinforce stock bars.  Hooks allowed.

HOOD:  Need not be original (but keep it close).  MUST have at least 8” visible numbers on each side of hood.  Racers are responsible for providing their own bibs.  Bib number MUST match hood number.  Number may be on bib or jacket. 

SEAT:  MAY run a seat to your comfort.  New seats allowed (but they look bad in the relic class).

YOU MAY:  Change gear ratios, clutch weights and springs, running boards to comfort.  NO moving running boards from stock location.  Chassis, skis, handlebars, and exhaust may be reinforced.

***In the Relic, HR, & HD classes no changes or modifications are allowed unless they are specifically allowed by these rules.  If these rules do not SPECIFICALLY ALLOW a change or modification then it MUST be assumed that the change or modification IS NOT ALLOWED.

WBRC Limited CC RELIC CLASS: 

DRIVER:  Must be 16 years of age or older.

SNOWMOBILE:  Must be production line model with fan cooled single cylinder motor that was offered in 1973 or before. 

CHASSIS:  1973 & older chassis.  No race model or jackshaft chassis.   Panther chassis only for Arctic Cat riders. 

MOTOR:  Motors must have been offered in brand of sled you are running.  MUST be HR motor.  Maximum displacement allowed is 323 CC*.    Motors allowed:  CCW: 225, 248, 312   Hirth:  81R, 82R, 54R, 55R, 190R, 191R, 193R   JLO:  L292, L295, L297, L300   Kohler:  K295-1, K295-1T, K309-1   Rotax:  300, 302, 320, 335  (* Rotax and ONLY Rotax motors may exceed the 323 CC limit.  Rotax 335 allowed to run with a maximum overbore of .060".)  Sachs:  SA280, SA290   Suzuki:  SM30.  Motors NOT allowed:  Yamaha, Kawasaki, Sachs sa290C, sa290R, sa320, 250 Polaris,  Hirth 192R,  Chaparral 248 / Fuji 250,   JLO 290R, Rotax 292 TNT,.  Motor MUST remain stock.  NO grinding on ports, head, etc.  NO modifications on any internal parts of motor.  No decreasing of rotating mass.  Piston:  Stock or stock replacement.  Aftermarket pistons allowed.  Aftermarket pistons must match stock OEM specs.  No coating of pistons. No cutting skirts.  Motor MUST have points style ignition (No CDI’s).  MUST run OEM fan.  Must run stock OEM rewind.

CLUTCH:  Original, Comet 94c Duster, or Power Block.  Clutches have to remain stock.  NO changing to aluminum or lightening any of the stock components of the clutch, besides normal weights and springs.  NO decreasing of rotating mass.  MUST have clutch guard.

CARB:  MUST run an HR carb (diaphragm type).  Must be of the original brand and size for that snowmobile.  If stock carb is Mikuni, max. venturi of 34mm.

EXHAUST & MUFFLER:  Original or stock replacement.  Exhaust MUST match brand of sled.  MUST be a can style exhaust.  MAY be reinforced.  NO tuners and no cutting the muffler open.  MUST have straight diameter head pipe if not OEM (2" max. diameter).  MUST run stock size outlet.

BRAKES:  MUST run stock brakes in original location.  NO juice brakes.  (There are other classes that allow that.)

TRACK:  MUST be original or OEM stock replacement.  NO conversions (cleat to rubber, rubber to cleat, bogie to slide, etc.).  NO cutting of cleats.  Traction products allowed.  Must be ½” or less above highest point of track.

SKIS:  MUST be original or stock replacement (brand specific).  NO ski skins or any plastic on bottom of skis.  NO aluminum skis.  Ski spreaders allowed.  Maximum width 2.5" (Center of spindle shaft to center of ski spring.)  Carbides allowed (Max. height 11/16" from bottom of ski).  NO aftermarket shocks allowed.  MAY use billet spindles.  Diameter of spindle may NOT exceed the diameter of the original spindle race.  Spindle race MUST remain in the stock location at the stock angle.  (i.e. The spindle race may NOT be cut off to widen the ski stance or change the angle that the spindle rides.)

FUEL TANK:  MUST be original or OEM stock replacement in original location.  NO secondary tanks of any kind allowed.  MUST use non-ethanol gasoline (91+ octane) and race gasoline only.  No E-85, alcohol, nitro-methane, or other fuels and additives allowed.

SNOW FLAP:  MUST run snow flap of any kind.  MUST be within 2” of ice when rider is sitting.

HANDLE BARS:  Need not be stock bars.  MAY bend and reinforce stock bars.  Hooks allowed.

HOOD:  Need not be original (but keep it close).  MUST have at least 8” visible numbers on each side of hood.  Racers are responsible for providing their own bibs.  Bib number MUST match hood number.  Number may be on bib or jacket. 

SEAT:  MAY run a seat to your comfort.  New seats allowed (but they look bad in the relic class).

YOU MAY:  Change gear ratios, clutch weights and springs, running boards to comfort.  NO moving running boards from stock location.  Chassis, skis, handlebars, and exhaust may be reinforced.  

***In the Relic, HR, & HD classes no changes or modifications are allowed unless they are specifically allowed by these rules.  If these rules do not SPECIFICALLY ALLOW a change or modification then it MUST be assumed that the change or modification IS NOT ALLOWED.

WBRC HR STOCK CLASS: 

DRIVER:  Must be 16 years of age or older.

SNOWMOBILE:  Must be production line model with fan cooled single cylinder motor that was offered in 1973 or before. 

CHASSIS:  1973 & older chassis.  1975 & older chassis of the same composition and dimensions as 1973 models allowed.  You MAY use 1976 and OLDER suspensions, chain cases, and secondary clutches.  MUST be brand specific.  Aftermarket shocks of any kind are allowed.  Billet drivers and idlers allowed.  No race model or jackshaft chassis. 

MOTOR:  You MAY substitute any motor in your chassis if it was offered in that brand of sled in any year 1973 or before, i.e. If it ever came with a SACHS motor in 1973 or before you may run any SACHS single cylinder motor.  Motors NOT allowed in HR STOCK CLASS:  SACHS sa340SS, sa340C, Hirth 194R, Yamaha GP.  (SACHS sa290SS and Rotax 292 TNT motors with HR carb are allowed in HR STOCK CLASS.) Motor MUST remain stock.  NO grinding on or bead blasting ports, head, etc.  NO coating of ports.  NO modifications on any internal parts of motor.  No decreasing of rotating mass.  Piston MUST remain stock or stock replacement.  Max. overbore of .120" (SA320 head allowed on .120" over bored SA290).  Motor MUST have points style ignition (No CDI’s).  MUST run OEM fan.  Must run stock OEM rewind.

CLUTCH:  Original, Comet 94c Duster, or Power Block.  Clutches have to remain stock.  NO changing to aluminum or lightening any of the stock components of the clutch, besides normal weights and springs.  NO decreasing of rotating mass.  MUST have clutch guard.

CARB:  MUST run original or other diaphragm type of 2 ¼” bolt pattern.

EXHAUST & MUFFLER:  Original or stock replacement.  MAY run any brand exhaust on any sled, (i.e. Suzuki on Arctic Cat, Scorpion on Rupp, etc.).  MUST be a can style exhaust.  MAY be reinforced.  NO tuners and no cutting the muffler open.  MUST have straight diameter head pipe if not OEM (2" max. diameter).

BRAKES:  Juice brakes allowed in any location.

TRACK:  Original or OEM replacement. R tracks allowed (Min. 15”)  MAY cut cleats (Min. 15”)  Traction products allowed.  Must be ½” or less above highest point of track.

SKIS:  MUST be original or stock replacement (brand specific).  NO ski skins or plastic of any kind.  NO aluminum skis.  Ski spreaders allowed.  Maximum width 2.5" (Center of spindle shaft to center of ski spring.)  Carbides allowed (Max. height 11/16" from bottom of ski).  MAY use billet spindles.  Diameter of spindle may NOT exceed the diameter of the original spindle race.  Spindle race MUST remain in the stock location at the stock angle.  (i.e. The spindle race may NOT be cut off to widen the ski stance or change the angle that the spindle rides.)

FUEL TANK:  Must be original or OEM stock replacement.  Does NOT have to be in original location.  6.25 gallon max. capacity.  NO secondary tank of any kind allowed (i.e. only one tank).  MUST use non-ethanol gasoline (91+ octane) and race gasoline only.  No E-85, alcohol, nitro-methane, or other fuels and additives allowed.

SNOW FLAP:  MUST run snow flap of any kind.  MUST be within 2” of ice when rider is sitting on sled.

HOOD:  Need not be original (but keep it close).  MUST have at least 8” visible numbers on each side of hood.  Racers are responsible for providing their own bibs.  Bib number MUST match hood number.  Number may be on bib or jacket.

YOU MAY:  Change gear ratios, change clutch weights and springs, change seat, handle bars, and running boards to comfort.  Chassis, skis, handlebars, and exhaust may be reinforced.

***In the Relic, HR, & HD classes no changes or modifications are allowed unless they are specifically allowed by these rules.  If these rules do not SPECIFICALLY ALLOW a change or modification then it MUST be assumed that the change or modification IS NOT ALLOWED.

WBRC HD STOCK CLASS: 

DRIVER:  Must be 16 years of age or older.

SNOWMOBILE:  Must be production line model with fan cooled single cylinder motor that was offered in 1973 or before. 

CHASSIS:  1973 & older chassis.  1975 & older chassis of the same composition and dimensions of 1973 models allowed.  You MAY use 1976 and OLDER suspensions, chain cases, and secondary clutches.  MUST be brand specific.  Aftermarket shocks of any kind are allowed.  Billet drivers and idlers allowed.  No race model or jackshaft chassis.                                                                                                                           MOTOR:  You MAY substitute any motor in your chassis if it was offered in that brand of sled in any year 1973 or before, i.e. If it ever came with a SACHS motor in 1973 or before you may run any SACHS single cylinder motor.  Motor MUST remain stock.  NO grinding on or bead blasting ports, head, etc.  NO coating of ports.  NO modifications on any internal parts of motor.  No decreasing of rotating mass.  Piston MUST remain stock or stock replacement.  Max. overbore of .120" (SA 370 head allowed on .120" over bored SA340ss).  Motor MUST have points style ignition (No CDI’s).  MUST run OEM fan.  Must run stock OEM rewind.

CLUTCH:  Original, Comet 94c Duster, or Power Block.  Clutches have to remain stock.  NO changing to aluminum or lightening any of the stock components of the clutch, besides normal weights and springs.  NO decreasing of rotating mass.  MUST have clutch guard.

CARB:  MUST run original or other diaphragm type of 2 15/16” bolt pattern.

EXHAUST & MUFFLER:  Original or stock replacement.  MAY run any brand exhaust on any sled, (i.e. Suzuki on Arctic Cat, Scorpion on Rupp, etc.).  MUST be a can style exhaust.  MAY be reinforced.  NO tuners and no cutting the muffler open.  MUST have straight diameter head pipe if not OEM (2" max. diameter).

BRAKES:  Juice brakes allowed in any location.

TRACK:  Original or OEM replacement. R tracks allowed (Min. 15”)  MAY cut cleats (Min. 15”).  Traction products allowed.  Must be ½” or less above highest point of track.

SKIS:  MUST be original or stock replacement (brand specific).  NO ski skins or plastic of any kind.  NO aluminum skis.  Ski spreaders allowed.   Maximum width 2.5" (Center of spindle shaft to center of ski spring.)  Carbides allowed (Max. height 11/16" from bottom of ski).  MAY use billet spindles.  Diameter of spindle may NOT exceed the diameter of the original spindle race.  Spindle race MUST remain in the stock location at the stock angle.  (i.e. The spindle race may NOT be cut off to widen the ski stance or change the angle that the spindle rides.)

FUEL TANK:  Must be original or OEM stock replacement.  Does NOT have to be in original location.  6.25 gallon max. capacity.  NO secondary tanks of any kind allowed (i.e. only one tank).  MUST use non-ethanol gasoline (91+ octane) and race gasoline only.  No E-85, alcohol, nitro-methane, or other fuels and additives allowed.

SNOW FLAP:  MUST run snow flap of any kind.  MUST be within 2” of ice when rider is sitting on sled.

HOOD:  Need not be original (but keep it close).  MUST have at least 8” visible numbers on each side of hood.  Racers are responsible for providing their own bibs.  Bib number MUST match hood number.  Number may be on bib or jacket.

YOU MAY:  Change gear ratios, change clutch weights and springs, change seat, handle bars, and running boards to comfort.  Chassis, skis, handlebars, and exhaust may be reinforced.

WBRC MOD CLASS: 

DRIVER:  Must be 16 years of age or older.

SNOWMOBILE:  Must be production line model with fan cooled single cylinder motor that was offered in 1976 or before. 

CHASSIS:  1976 & older chassis.  MAY run any suspension from sled up to current year.  NO race model or jackshaft chassis. 

MOTOR:  Any FAN cooled, piston port, single cylinder motor 1973 & OLDER in any make chassis.  i.e. Yamaha in Arctic Cat, Rupp, etc.  ANY motor mods allowed.  Motor MUST have points style ignition (No CDI’s).

CLUTCH:  ANY clutch.  MUST have clutch guard.  May run ANY chain case but drive shaft MUST stay in stock location.  NO rolling of chain case.

CARB:  ANY carb.  NO reeds.

EXHAUST & MUFFLER:  ANY pipe.

BRAKES:  Juice brakes allowed in any location.

TRACK:  ANY track.  Traction products allowed.  Must be ½” or less above highest point of track.

SKIS:  ANY skis.  Carbides allowed (Max. height 11/16" from bottom of ski).

FUEL TANK:  ANY tank

SNOW FLAP:  MUST run snow flap of any kind.  MUST be within 2” of ice when rider is sitting.

HOOD:  Any hood any belly pan.  MUST have at least 8” visible numbers on each side of hood.  Racers are responsible for providing their own bibs.  Bib number MUST match hood number.  Number may be on bib or jacket.

YOU MAY:  Change seat, handle bars, and running boards to comfort.  Chassis, skis, handlebars, and exhaust may be reinforced.

ENTICER CLASS:  

You guys know the rules and seem to have it under control.  (I plan on building a Scorpion that will break most of these rules.)

Enticer 250 CLASS 1977 to 1983,

NO changes or modification allowed UNLESS specified by these rules. If these rules do not specifically allow a change or modification, it is assumed that the change or modification is NOT allowed.  

Chassis:  Production line model with a single cylinder fan cooled 250 motor. NO JACK SHAFT CHASSIS.   - Bulkhead must be stock and unaltered. Reinforcement and bracing only.  

Suspension and Track:  Suspension must be stock and unaltered and mounted in stock location - Track must be stock and unaltered (Upgrading clips will be allowed) - Track Studs can measure a maximum of 1⁄2” max past lug. Will be checked with a “Go No Go ‘gauges.  Unaltered means unaltered. (Just the way is came from the factory.  

Skis:  Skis must be original or stock replacement. NO Aluminum or UNSAFE SKIS!  Carbide allowed - 24” Leaf Spring minimum length. - Max ski spread of 34” measured center to center of ski. - Ski spread will be checked after race. - Spindle must be stock and unaltered. 

 Engines:  Engines must be stock in the model and year of sled you are running. - Engines must remain stock, no grinding, porting, sandblasting, shaving on anything.   Engine may have the OEM CDI or factory points (NO MODIFICATIONS ALLOWED) - Must have stock, unaltered fan and stock recoil.  You can update the spine crank to a 30mm taper crank.

Pistons:  Can be stock or aftermarket unaltered replacement, no cutting skirts. (Max over bore 1 mm (.040) 

Carb:  Stock carb or any aftermarket carb (aftermarket carb 34mm max)  

Clutch:  Any Primary Clutch.  Chain, chain cases and secondary clutch must be stock and unaltered.  Gearing my not be changed ET 250 GEARING ONLY

Exhaust:  Head pipe and muffler must be stock, unaltered and in stock location.  

Fuel and Tank:  Fuel Tank Fuel tanks must be stock and mounted in stock location, 250 Enticer can run 300 Enticer tank Chassis: - 1977 to 1983, Enticer 250-300 or 340 chassis.  - Non Ethanol gasoline and race gasoline only, NO E-85, Alcohol, Nitro Methane or any other fuel allowed.

Brakes:  Your brakes must be in working condition. (Will be checked) - Brake MAY BE MOVED from stock location, relocated and converted to hydraulic. (IE Extended OEM Drive Shaft with disc) May use hydraulic brake setup off of newer sled.  

Hood & Seat:   You must run a stock hood and belly pan. ( hood my be altered but not belly pan).- Numbers must be 8” and visible on both sides. (Should be black and white) - Any seat may be used and any handle bars.

Saftey Equipment:  Snow flap must touch ice/snow with rider on machine. - MUST have a working tether cord and USE it. -   Tether switch MUST be mounted to the frame. - MUST have steel OEM belt guard