Midwest Vintage Racing
General Rules for ALL classes:
No changes or modification allowed unless specified in the class rules. If these rules do not
specifically allow a change or modification, it is assumed that the change or modification is
NOT allowed.
1- Must agree to all decisions made by officials, uncontested.
2- NO drug or alcohol use before or during races.
3- Tech inspections are mandatory at every race pre-tech and post-tech.
4- You must wear a full face helmet. Helmet must be properly secured.
5- Absolutely no picking up sled on line or use of stands to clean track at line up.
6- Tech may remove sled at any time if deemed unsafe.
7- Flak jacket and knee protection are recommended.
8- Clutches must have guards. (Aluminum or steel, NO Plastic)
9- If you are in the top 5 in a final, you can and will be torn down for the techs. Any tear down REFUSALS will be disqualified and lose all points for the season. If you give tech or track officials any problems, you will be suspended from these races.
10- When Registration is closed, there are no refunds.
11- A 250 enticer will be allowed in youth and women's class.
12- All sleds must have padding on ski-tips. (pipe foam taped on works)
13- Youth class must have a working red light on the back of the sled. (min 4in in width)
14- Tear downs will happen if tech decides to do so. Drivers may also put up $200.00 to have someone torn down, if you have reason to believe that they are illegal. If they are illegal, you will get your money back. If they are LEGAL you will give them $200.00 for the hassle.
Midwest Vintage Racing
HR CLASS RULES
1973 and older, production line model with a single cylinder fan cooled motor.
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.
Engines:
- Engines not allowed in this class Sachs SA340SS, SA340C, SA400 or Hirth 194R
- Engines must have been offered in the Brand of sled you are running.
- Engines must remain stock, no grinding, porting, sandblasting, shaving on anything.
- Pistons can be stock or aftermarket replacement, no cutting skirts. (Max over bore .150)
- Carb must be original or other diaphragm carb with 2 1/4 inch bolt pattern (no aftermarket or billet carbs)
- Primary Clutch stock 1976 and older standard production. (must be brand specific) or 94 c dusters or Power Block allowed.
- Engine must have OEM point ignition. (no cdi)
- Must have stock fan and stock recoil. (must be brand specific)
- No fuel pumps allowed unless it was factory with the sled.
- None Ethanol gasoline and race gasoline only, NO E-85, Alcohol, Nitro Methane or any other fuel allowed.
- Exhaust and muffler must be stock or stock replacement. Head pipe may not exceed 2”OD. No tuned pipes.
- If the head pipe exceeds 2” the exhaust must be stock to year, make and model of sled and may not be altered.
Fuel Tank
- Fuel tanks must be mounted in stock location to year of sled and must not exceed 6.5 gal. Aftermarket or homemade tanks allowed.
Chassis:
- 1973 and older, no limited production or race chassis. NO jackshaft chassis. Chassis 1976 and older may be used as long
and it is the same material and dimensions as a 73 sled. Example: 1974 Arctic Lynx II is the same Chassis as a 1972 Cheetah.
- Bulkhead must be stock and unaltered. Reinforcement and bracing only.
(Maybe modified for 76 and older chain case only)
- 1976 and older chain cases and secondary clutch allowed. (must be brand specific)
- Skis must be original or stock replacement. NO Aluminum or unsafe skis! Any carbide allowed.
- You must run a hood and stock belly pan.
- 24” Leaf Spring minimum length.
- Ski spreaders allowed max 2.5” measured from center of spindle to center of ski.
- Any spindle allowed but must fit in stock unaltered bulk head.
- Numbers must be 8” and visible on both sides. (Should be black and white)
- Any seat may be used and any handle bars.
- Your brakes must be in working condition. (Will be checked)
- Brake may be moved from stock location and relocated.
(IE Extended Drive Shaft with disc) May use hydraulic brake setup off of newer sled.
- Snow flap must touch ice/snow with rider on machine.
- Must have a working tether cord and USE it. Must be mounted to the frame.
Suspension and track:
- Suspension may be 1976 and older stock production and can be reinforced only. No snow pro suspensions or “Z” Any 1976 and older is allowed as long as its not a limited production or factory race suspension. (ex. Yamaha suspension in a Polaris). May be shortened to fit chassis only. (Do your homework)
- 8in idler wheel max size
- Any track allowed, Must be a minimum of 15”wide, and must be stock length or longer of the model sled you are running.
- Max cleat or lug height of 3/4”
- No aluminum or titanium cleats and rubber tracks my not be modified.
- Track Studs can measure a maximum of 1⁄2” max past cleat or lug. Will be checked with a “Go No Go ‘gauges.
- Any drive shaft and drivers can be used.
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.
Midwest Vintage Racing
HD CLASS RULES
1973 and older, production line model with a single cylinder fan cooled motor.
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.
Engines:
- Engines must have been offered in the Brand of sled you are running!
- Engines must remain stock, no grinding, porting, sandblasting, shaving on anything.
- Pistons can be stock or aftermarket replacement, no cutting skirts. ( Max over bore .150)
- Carb must be original or other diaphragm carb with 2 5/16 inch bolt pattern (no aftermarket or billet carbs)
- Primary Clutch stock 1976 and older standard production. (must be brand specific) or 94 c dusters or Power Block allowed. No comet 100 or 102c
- Engine must have OEM point ignition (no cdi)
- Must have recoil.
- No fuel pumps allowed unless it was factory with the sled.
- None Ethanol gasoline and race gasoline only, NO E-85, Alcohol, Nitro Methane or any other fuel allowed.
- Exhaust and muffler must be stock or stock replacement. Head pipe may not exceed 2”OD. No tuners!
- If the head pipe exceeds 2” the exhaust must be stock to year, make and model of sled and may not be altered.
Fuel Tank
- Fuel tanks must mounted in stock location and must not exceed 6.5 gal. Aftermarket and homemade tanks allowed.
Chassis:
- 1973 and older, no limited production or race chassis. NO jackshaft chassis. Chassis 1976 and older may be used
as long and it is the same material and dimensions as a 73 sled. Example: 1974 Arctic Lynx II is the same Chassis
as a 1972 Cheetah.
- Bulkhead must be stock and unaltered. Reinforcement and bracing only (May be modified for 76 and older chain case only)
- 1976 and older chain cases and secondary clutch allowed. (must be brand specific)
- Skis must be original or stock replacement. NO Aluminum or unsafe skis! Any carbide allowed.
- You must run a hood and STOCK belly pan.
- 24” Leaf Spring minimum length.
- Ski spreaders allowed max 2.5” measured from center of spindle to center of ski.
- Any spindle allowed but must fit in stock unaltered bulk head.
- Numbers must be 8” and visible on both sides (Should be black and white)
- Any seat may be used and any handle bars.
- Your brakes must be in working condition (Will be checked)
- Brake may be moved from stock location and relocated (IE Extended Drive Shaft with disc) May use hydraulic brake setup off of newer sled.
- Snow flap must touch ice/snow with rider on machine.
- Must have a working tether cord and USE it. Must be mounted to the frame.
Suspension and track:
- Suspension may be 1976 and older stock production and can be reinforced only. No snow pro suspensions or “Z”. Any 1976 and older suspension is allowed as long its not a limited production or factory race sled suspension (ex. Yamaha suspension in a Polaris). May be modified to fit chassis only. (Do your homework)
- 8in idler wheel max size
- Any track allowed, Must be a minimum of 15”wide, and must be stock length or longer of the model sled you are running.
- Max cleat or lug height of 3/4”
- No aluminum or titanium cleats and rubber tracks my not be modified.
- Track Studs can measure a maximum of 1⁄2” max past cleat or lug. Will be checked with a “Go No Go ‘gauges.
- Any drive shaft and drivers can be used.
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.
Midwest Vintage Racing
RELIC CLASS
1973 and older, production line model with a single cylinder fan cooled motor. 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.
Engines:
- Engines must have been offered in the model of sled you are running!
- Motors not allowed: Yamaha, Kawasaki ,Hirth 338, Sachs sa290c, sa290ss, sa290R, sa320,sa340SS, sa340C,
sa340, sa340R, sa368 with HD carb, sa400, JLO 290R/ 340R, Rotax 292 TNT and 340 TNT
- Carb must be HR size carb or smaller. You can replace an HD carbureted motor with and HR as long as the motor
is within the acceptable motors list.
(Example- a 69 Panther can run a 368 Sachs but the carb has to be changed to an HR size)
- Carb must be original or other diaphragm carb with 2 1/4 inch bolt pattern (no aftermarket or billet carbs)
- Engines must remain stock, no grinding, porting, sandblasting, shaving on anything.
- Pistons can be stock or aftermarket replacement, no cutting skirts. ( Max over bore .150)
- Primary Clutch stock 1976 and older standard production. (must be brand specific) or 94 c dusters or Power Block allowed.
- Engine must have OEM point ignition. (no cdi)
- Must have recoil.
- No fuel pumps allowed unless it was factory with the sled.
- None Ethanol gasoline and race gasoline only, NO E-85, Alcohol, Nitro Methane or any other fuel allowed.
- Exhaust and muffler must be stock or stock replacement. Head pipe may not exceed 2”OD. No tuners!
- If the head pipe exceeds 2” the exhaust must be stock to year, make and model of sled and may not be altered.
Fuel Tank:
- Fuel tanks must be stock to manufacture of sled 1976 or Older, Mounted in stock location and must not exceed 6 gal. No aftermarket or homemade tanks
Chassis:
- 1973 and older, no limited production or race chassis. NO jackshaft chassis. (Panther chassis only)
- Bulkhead must be stock and unaltered. Reinforcement and bracing only.
- Skis must be original or stock replacement. No Aluminum or unsafe skis. Any carbide allowed
- You must run a hood and belly pan.
- 24” Leaf Spring minimum Length.
- Ski spreaders allowed max 2.5” measured from center of spindle to center of ski.
- Any spindle allowed but must fit in stock unaltered bulk head.
- Numbers must be 8” and visible on both sides (Should be black and white)
- Any seat may be used and any handle bars.
- Your brakes must be in working condition (Will be checked)
- Brake may be moved from stock location and relocated (IE Extended Drive Shaft with disc) May use hydraulic brake setup off of newer sled.
- Must have a working tether cord and USE it. Must be mounted to the frame not handle bars
- Snow flap must touch ice/snow with rider on machine.
Suspension and track:
- Suspension can only be from a 73 and older sled of the same model. No modifications allowed except reinforcement. If it came with bogies you must run bogies
- Tracks must be 73 or older and no modifications allowed, NO Light weight tracks. Cleated tracks must remain cleated, rubber must remain rubber.
- No aluminum or titanium cleats
- Track Studs can measure a maximum of 1⁄2” max past cleat or lug. Will be checked with gauges.
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.
Midwest Vintage Racing
77-83 250 CLASS
1977 to 1983, production line model with a single cylinder fan cooled 250 motor.
NO JACK SHAFT CHASSIS
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.
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.
- Pistons can be stock or aftermarket unaltered replacement, no cutting skirts. (Max over bore 1 mm (.040)
- Stock carb or any aftermarket carb (aftermarket carb 34mm max)
- Any Primary Clutch
- Engine may have the OEM CDI or factory points (No modifications allowed)
- Must have stock, unaltered fan and stock recoil.
- None Ethanol gasoline and race gasoline only, NO E-85, Alcohol, Nitro Methane or any other fuel allowed.
- Head pipe and muffler must be stock, unaltered and in stock location
- You can update the spine crank to a 30mm taper crank
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.
- Bulkhead must be stock and unaltered. Reinforcement and bracing only.
- Chain, Chain Cases and secondary clutch must be stock and unaltered
- Skis must be original or stock replacement. NO Aluminum or unsafe SKIS! carbide allowed
- You must run a stock hood and belly pan. ( hood my be altered but not belly pan)
- 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.
- Numbers must be 8” and visible on both sides. (Should be black and white)
- Any seat may be used and any handle bars.
- 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.
- Snow flap must touch ice/snow with rider on machine.
- Must have a working tether cord and USE it. Must be mounted to the frame.
- Gearing my not be changed ET 250 GEARING ONLY
- Must have steel OEM belt guard
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.
Midwest Vintage Racing
292 Kawi Class
1973 and older, production line model with a single cylinder fan cooled motor. 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. A kawi 292 must have been offered in brand of chassis from factory to be eligible.
Engine:
- 292 Kawi only
- HR carb only
- Engines must remain stock, no grinding, porting, sandblasting, shaving on anything.
- Pistons can be stock or aftermarket replacement, no cutting skirts. ( Max over bore .040)
- Primary Clutch stock 1976 and older standard production. (must be brand specific) or 94 c dusters or Power Block allowed.
- Engine must have OEM point ignition. (no cdi)
- Must have recoil.
- No fuel pumps allowed unless it was factory with the sled.
- None Ethanol gasoline and race gasoline only, NO E-85, Alcohol, Nitro Methane or any other fuel allowed.
- Exhaust and muffler must be stock or stock replacement. Head pipe may not exceed 2”OD. No tuners!
- If the head pipe exceeds 2” the exhaust must be stock to year, make and model of sled and may not be altered.
Fuel Tank
- Fuel tanks must be mounted in stock location to year of sled and must not exceed 6.5 gal. Aftermarket or homemade tanks allowed.
Chassis:
- 1973 and older, no limited production or race chassis. NO jackshaft chassis. Chassis 1976 and older may be used as long
and it is the same material and dimensions as a 73 sled. Example: 1974 Arctic Lynx II is the same Chassis as a 1972 Cheetah.
- Bulkhead must be stock and unaltered. Reinforcement and bracing only.
(Maybe modified for 76 and older chain case only)
- 1976 and older chain cases and secondary clutch allowed. (must be brand specific)
- Skis must be original or stock replacement. NO Aluminum or unsafe skis! Any carbide allowed.
- You must run a hood and stock belly pan.
- 24” Leaf Spring minimum length.
- Ski spreaders allowed max 2.5” measured from center of spindle to center of ski.
- Any spindle allowed but must fit in stock unaltered bulk head.
- Numbers must be 8” and visible on both sides. (Should be black and white)
- Any seat may be used and any handle bars.
- Your brakes must be in working condition. (Will be checked)
- Brake may be moved from stock location and relocated.
(IE Extended Drive Shaft with disc) May use hydraulic brake setup off of newer sled.
- Snow flap must touch ice/snow with rider on machine.
- Must have a working tether cord and USE it. Must be mounted to the frame.
Suspension and track:
- Suspension may be 1976 and older stock production and can be reinforced only. No snow pro suspensions or “Z” Any 1976 and older is allowed as long as its not a limited production or factory race suspension. (ex. Yamaha suspension in a Polaris). May be shortened to fit chassis only. (Do your homework)
- 8in idler wheel max size
- Any track allowed, Must be a minimum of 15”wide, and must be stock length or longer of the model sled you are running.
- Max cleat or lug height of 3/4”
- No aluminum or titanium cleats and rubber tracks my not be modified.
- Track Studs can measure a maximum of 1⁄2” max past cleat or lug. Will be checked with a “Go No Go ‘gauges.
- Any drive shaft and drivers can be used.
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.
Midwest Vintage Racing
Mid-mount Motor
This will be an HD and HR combined class. Motor must remain in stock location and for a chassis to qualify the motor cannot be in the bulkhead or in a forward position of the sled. (ex. the position of a yamaha motor fits this class.
1973 and older, production line model with a single cylinder fan cooled motor.
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.
Engines:
- Engines must have been offered in the Brand of sled you are running!
- Engines must remain stock, no grinding, porting, sandblasting, shaving on anything.
- Pistons can be stock or aftermarket replacement, no cutting skirts. ( Max over bore .150)
-Carb can either be HD or HR (no aftermarket or billet carbs)
- Primary Clutch stock 1976 and older standard production. (must be brand specific) or 94 c dusters or Power Block allowed. No comet 100 or 102c
- Engine must have OEM point ignition (no cdi)
- Must have recoil.
- No fuel pumps allowed unless it was factory with the sled.
- None Ethanol gasoline and race gasoline only, NO E-85, Alcohol, Nitro Methane or any other fuel allowed.
- Exhaust and muffler must be stock or stock replacement. Head pipe may not exceed 2”OD. No tuners!
- If the head pipe exceeds 2” the exhaust must be stock to year, make and model of sled and may not be altered.
Fuel Tank
- Fuel tanks must mounted in stock location and must not exceed 6.5 gal. Aftermarket and homemade tanks allowed.
Chassis:
- 1973 and older, no limited production or race chassis. NO jackshaft chassis. Chassis 1976 and older may be used
as long and it is the same material and dimensions as a 73 sled. Example: 1974 Arctic Lynx II is the same Chassis
as a 1972 Cheetah.
- Bulkhead must be stock and unaltered. Reinforcement and bracing only (May be modified for 76 and older chain case only)
- 1976 and older chain cases and secondary clutch allowed. (must be brand specific)
- Skis must be original or stock replacement. NO Aluminum or unsafe skis! Any carbide allowed.
- You must run a hood and STOCK belly pan.
- 24” Leaf Spring minimum length.
- Ski spreaders allowed max 2.5” measured from center of spindle to center of ski.
- Any spindle allowed but must fit in stock unaltered bulk head.
- Numbers must be 8” and visible on both sides (Should be black and white)
- Any seat may be used and any handle bars.
- Your brakes must be in working condition (Will be checked)
- Brake may be moved from stock location and relocated (IE Extended Drive Shaft with disc) May use hydraulic brake setup off of newer sled.
- Snow flap must touch ice/snow with rider on machine.
- Must have a working tether cord and USE it. Must be mounted to the frame.
Suspension and track:
- Suspension may be 1976 and older stock production and can be reinforced only. No snow pro suspensions or “Z”. Any 1976 and older suspension is allowed as long its not a limited production or factory race sled suspension (ex. Yamaha suspension in a Polaris). May be modified to fit chassis only. (Do your homework)
- 8in idler wheel max size
- Any track allowed, Must be a minimum of 15”wide, and must be stock length or longer of the model sled you are running.
- Max cleat or lug height of 3/4”
- No aluminum or titanium cleats and rubber tracks my not be modified.
- Track Studs can measure a maximum of 1⁄2” max past cleat or lug. Will be checked with a “Go No Go ‘gauges.
- Any drive shaft and drivers can be used.
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.