Rules

MVSDRS Rules and Regulations Current as of March 28th 2013General Safety Rules

1. Any person operating a snowmobile shall be wearing a helmet.

2. It is required that safety eye wear be worn in the staging, pit and starting line areas.

3. Sleds should be cleaned out in the warm up area only with the tracks facing the boards.

4. Tethers have to be attached to the operator anytime the sled is running.

5. Safety stands will be required when warming engines in the warm up area. The stand should be well constructed, enclosing the rear portion of the track and support the sled a safe distance from the ice.

6. Safety stands will be used at the starting line when sled is leaving the starting line.

7. Driver must have feet on running boards or foot pegs for the entire duration of the race. Driver must be sitting on the seat at all times during the duration of the race.

8. Moving a running sled on a stand will not be allowed. Clean out in designated areas only.

9. Crew may only be in starting area when your sled is racing.

10. It is required that all drivers wear chest protection in all classes

11. The race director or any tech personnel can disqualify any one that does not follow safety rules.

12. Drivers must be minimum 18 years of age. This rule differs at each event per the insurance they run at that event.

13. Throttle must be thumb operated.

General Sled Requirements

1. Any sled moving to a class other than the class for which it qualifies must meet the criteria for that class.

2. A variable ratio belt driven transmission must propel all sleds.

3. Limiter straps are required in all vintage classes.

4. All mod sleds must be equipped with stab wheels on the front of the slide rails to prevent rails from piercing track.

5. No stutter boxes allowed on the sled, even if it is not connected. Any electronic control device found other than ignition components will be disqualified.  Tach, and data logging devices are allowed. 

6. All tethers cords shall be attached to the driver's wrist and not be any longer than 24 inches long when fully extended.

7. OEM cleated tracks will be allowed in stock classes. Cleated tracks will be allowed in the mod classes as well, it is required to use solid rivets 1/4 inch in size and with a 5/8 inch head. All open holes must be filled with a legal fastener. No grinding or welding will be allowed on cleats. All tracks will be inspected! No pop riveted cleats.

8. Tracks cannot be shaved.

9. Studs may not protrude more than 3/4 of an inch above the highest point of the track lug or the highest point of the cleat.

10. On one-piece rubber molded tracks: except for under slide rails, all plates will be no greater than 2 1/4 inches in length and width. Plates under slide rails may be no longer than 3 1/4 inch and no wider than 1 1/4, inch.

11. No alcohol, nitro-blend fuels or power adders allowed gasoline only. Fuel mav be tested.

Protest Fees and Procedures

1. All protests are subject to a $100 (cash) protest fee.

2. Race officials must deem the protest valid prior to accepting the protest fee.

3. Protester must specify the protest.

4. No protesting races finish order or rulings by any race Official.

5. If protest is found to be valid, the protester fee will be returned.

6. No protest will be accepted after 15 minutes of the completion of the class

7. Invalid protest, protester will forfeit fee and 50% will go to protested entrant and 50% to race organization.

8. Any racer/sled owner caught cheating will be banished from racing for 2 calendar years.

9.IF THESE RULES DO NOT SPECIFICALLY ALLOW A CHANGE OR MODIFICATION. THEN IT MUST BE ASSUMED THAT THE CHANGE OR MODIFICATION IS NOT ALLOWED.

 

Vintage Stock Classes

 

G  F  E  D C  B  A   AA

B Heavy   D Heavy

 

Driver must weight 175 lbs in Heavy Stock classes. Lighter drivers may use ballast on sled to make up the difference. Ballast must be bolted on with a min 5/16 grade 8 bolt with locking nut.

 

Stock Sled Requirements

1. Sled must 1982 or older

2. Sled must pass safety inspection prior to racing

3. Cleated tracks will be allowed, but must be in good physical condition and cleats fully fastened (no open holes). NO CRACKED RIVETS.

Carburetion

1. Must use OEM carburetors and components for make & model. No modifications allowed.

2. Air box may be removed.

3. Gasoline only, no power adders allowed, fuel may be tested. Non oxygenated fuel only

Engine

1. Must be original equipment for the make and model of sled. No component, including intake manifold, may be altered, changed, shaved or enlarged. Engine porting, port timing or polishing, stroke, crankcase, rod, crankshaft, rotary timing may not be altered. No change in engine dimensions. Head must be OEM for that motor. Chamber shape must remain the same. Head may be decked or resurfaced.

2. OEM or aftermarket pistons are allowed.

3. Cylinder overbore for wear cannot exceed .040 inches.

4. Oil injection pump may be removed.

5. The complete OEM exhaust For specific make & model must be used with no alterations.

6. Original means of cooling must be intact and functional. Quick disconnects are the only modification allowed.

Drive & Skies

1. Must have original primary and secondary clutches. If an original primary clutch cannot be obtained, a Comet 102 clutch may be substituted. NO ROLLER SECONDARY'S ALLOWED!!! Any 1981 or older clucth is allowed.

2. Clutch and chain guards must be intact. Guards improved for structural integrity will be allowed and are encouraged.

3. Material substitution or lightening of any drive component is not allowed.

4. Brakes must be functional.

5. Skis must be OEM appearing for that make and model of sled.

Track and Suspension

1. Only the OEM suspension will be allowed (front and rear) and must utilize stock mounting locations. Can widen the rails to accommodate rubber track conversion.

2. Any OEM track is allowed. Tracks may not be cut, trimmed or shaved. R tracks are allowed for rubber conversion (15" width only), must widen stock suspension, new suspension mounting holes may be added to accommodate moving skid in a new location. Cleated replacement tracks also allowed.

3. No slide lube allowed.

4. Additional idler wheels may be added.

5. Must have attached snow flap.

Frame and Body

1. No alterations, material substitutions, lightening, or additions to OEM frame, hood or body allowed.

2. Tunnels cannot be altered dimensionally. Material substitutions, lightening or additions to the OEM tunnel are not allowed.

3. Hood insulation may be removed.

4. Windshield may be removed or trimmed.

Electrical

1. Headlight may be removed.

2. Must use the stock production ignition for specific make & model. A Hewtech replacement is allowed such as Fireplug CDI

 

Vintage Modified Stock Classes

 

300cc-All   340 F/A   340 L/C   440 F/A   440 L/C   500F/A   500 L/C

 

Mod-Stock Sled Requirements

1. Sled must be 1982 model or older.

2. Sled must pass safety inspection prior to racing .

3. Liquid cooled 440cc IFS Sno-Pro sleds are to run in the 500cc IFS class and above. This will include any non IFS Sno-Pro sleds powered by an IFS Sno-Pro engine (i.e. clones). This also applies to the 340 IFS sleds as well; they are to run in the 340 IFS/Clone class.

4. Clutch covers for Mod Stock be separate of cowl configuration and cover clutches down to center of clutch bolt or below. Material should be .090 inch 6061 T6 aluminum or better and the outer perimeter be covered with 6 inch belting. If .125 aluminum is used, belting is recommended but not required.

5. Factory built race sleds that came with open pipes and with leaf springs are not allowed in this class and must race in the Pro Stock class.

Carburetion

1. No flat slide or aftermarket carburetors allowed.

2. Use of nitrous, turbo chargers and superchargers are not allowed. Gasoline only, no power adders allowed, fuel may be tested. Non oxygenated fuel only

Engines

1. Must match manufacturers installed engine for that make and model.

2. Engine modifications allowed, but outward appearance must remain stock, induction concept must remain stock for that model.

3. Any exhaust is allowed.

4. Cylinder overbore for wear cannot exceed .040 inches. Example: DO NOT TAKE A 440 AND MAKE IT INTO A 500 THAT WOULD EXCEED THE .040 OVER RULE.

5. ALL ENGINES MUST HAVE STOCK LENGTH STROKE, Resleeving a motor to a different size other than what it was originally is not allowed.

6. Single exhaust port cylinders only, triple port motors will run in Pro Stock. If your motor came stock with single exhaust ports and new ports were added to make It a triple port you will run in Pro Stock.

Drive & Skies

1. Any primary or secondary clutch is allowed.

2. Must have full metal clutch guard and OEM chain case in its stock location.

3. Brake must be functional.

4. Jack shafts and drive shafts, OEM locations may not be altered.

5. Any metal ski at least 20 inches in length is allowed.

Track and Suspension

1. Any suspension and track combination allowed.

2. No slide lube allowed.

3. Additional idler wheels may be added.

4. Must have attached snow flap that is a maximum of one inch above the ice with driver seated.

Frame and Body

1. Tunnels must be factory originated with a serial number and match the manufacturers installed tunnel for that make and model (no hand built chassis or aftermarket tunnels). Lightening or additions to the OEM tunnel are allowed as long as structural integrity, safety and OEM shape are not compromised. Bulkhead material must remain the same, Ex. If your bulkhead came OEM made of steel it must remain steel, and not substituted with aluminium. No custom tubular front ends will be allowed. Extra bracing added to the OEM bulkhead is allowed, cutting existing bracing out is NOT allowed.

2. Dash and shroud must remain OEM appearing. The outside gas tank shell must remain intact and in its OEM location. The fuel tank may be modified to accommodate a fuel cell. All fuel must be contained in the OEM for that model fuel tank location. The use of a fuel cell used within the above rule will not compromise the OEM appearance.

3. Belly pans may not be removed and must have stock appearance and location.

4. Reasonable alterations to hood to facilitate cooling are allowed.

5. Measures taken to strengthen these components are allowed.

6. Hood insulation may be removed. Hood shape must be OEM for that model and must meet belly pan in the OEM stock location. No PDC or sno pro hoods allowed.

7. Windshield may be removed or trimmed.

8. Headlight may be removed.

9. Seats must remain in OEM contour and be stocl< appearing. Seat dimensions witli height and length must be OEM for that model. Seat may be lightened up with light weight foam.

10. No tunnel extensions allowed.

11. No carbon fiber components allowed.

12. All tunnels must have an additional layer of aluminium (.060) added to either the top or bottom side of the tunnel. It must run from the very back of the tunnel up to the bulk head area. This is a safety rule to protect driver from a cleat and stud failures.

Electrical

1. No programmable or aftermarket ignitions allowed except Hewtech .

 

Vintage Pro Stock Classes

 

300cc all  340cc L/C   340cc FA   440cc L/C   440cc FA   500cc L/C   500cc FA   650cc FA

500cc Heavy Driver must weigh 200lbs   501cc+ Heavy Driver must weigh 200lbs

 

Pro Stock requirements

1. Sled must be 1982 or older.

2. Sled must pass safety inspection prior to race.

3. Clutch cover must be separate of the cowl configuration and cover the clutches down to the center of the clutch bolt or below. Material should be .090 inch 6061 T6 aluminium or better and the outer perimeter be covered with 6 inch belting. If .125 inch aluminium is used, belting is not required.

Carburetion

1. Any carburetor is allowed.

2. The use of nitrous, turbo chargers and superchargers are not allowed. Gasoline only, no power adders allowed. Non oxygenated fuel only.

Engines

1. Must match manufacturers installed engine for that make and model.

2. Engine modifications allowed, but outward appearance must remain stock, induction concept must remain stock for that model.

3. Any exhaust is allowed.

4. Cylinder overbore for wear cannot exceed .040 inches. Example: DO NOT TAKE A 440 AND MAKE IT INTO A 500 THAT WOULD EXCEED THE .040 OVER RULE.

5. ALL ENGINES MUST HAVE STOCK LENGTH STROKE, Resleeving a motor to a different size other than what it was originally is not allowed.

6. Additional ports may be added to OEM cylinders for that model.

Drive & Skies

1. Any primary or secondary clutch is allowed.

2. Must have full metal clutch guard .

3. Brake must be functional.

4. Chain case can be relocated from stock position.

5. Any chain case allowed

6. Jack shafts can be added to those sleds that did not come with one, but chain case rule above must be followed.

7. Any metal ski at least 20 inches in length is allowed.

Track and Suspension

1. Any suspension and track combination allowed.

2. No slide lube allowed.

3. Additional idler wheels may be added.

4. Must have attached snow flap that is a maximum of one inch above the ice with driver seated.

Frame and Body

1. Tunnels must be factory originated with a serial number and match the manufacturers installed tunnel for that make and model (no hand built chassis or aftermarket tunnels). Lightening or additions to the OEM tunnel are allowed as long as structural integrity, safety and OEM shape are not compromised. Bulkhead material must remain the same, Ex. If your bulkhead came OEM made of steel it must remain steel, and not substituted with aluminum. No custom tubular front ends will be allowed. Extra bracing added to the OEM bulkhead is allowed, cutting existing bracing out is NOT allowed.

2. Dash and shroud must remain OEM appearing. The outside gas tank shell must remain intact and in its OEM location. The fuel tank may be modified to accommodate a fuel cell. All fuel must be contained in the OEM for that model fuel tank location. The use of a fuel cell used within the above rule will not compromise the OEM appearance.

3. Belly pans may not be removed and must have stock appearance and location.

4. Reasonable alterations to hood to facilitate cooling are allowed.

5. Measures taken to strengthen these components are allowed.

6. Hood insulation may be removed. PDC and sno pro hoods allowed , but they must meet the belly pan in its stock OEM location.

7. Windshield may be removed or trimmed.

8. Headlight may be removed.

9. Seats must cover the length of the tunnel and must be a minimum of 3" in thickness.

10. Tunnel extensions are allowed.

11. All tunnels must have an additional layer of aluminium (.060) added to either the top or bottom side of the tunnel. It must run from the very back of the tunnel up to the bulk head area. This is a safety rule to protect driver from a cleat failure.

12. Carbon fiber components may be used.

Electrical

1. Programmable Ignitions Allowed

 

Vintage IFS & Clones Classes

 

340cc IFS   500cc IFS

 

IFS requirements

1. Sled must be 1982 or older.

2. Sled must pass safety inspection prior to race.

3. Clutch cover must be separate of the cowl configuration and cover the clutches down to the center of the clutch bolt or below. Material should be .090 inch 6061 T6 aluminium or better and the outer perimeter be covered with 6 inch belting. If .125 inch aluminium is used, belting is not required.

Carburetion

1. Any carburetor is allowed.

2. The use of nitrous, turbo chargers, and superchargers are not allowed. Gasoline only, no power adders allowed. Non oxygenated fuel only.

Engines

1. Engine modifications allowed, but outward appearance must remain stock, induction concept must remain stock for that model.

2. Any exhaust is allowed.

3. Cylinder overbore for wear cannot exceed .040 inches. Example: DO NOT TAKE A 440 AND MAKE IT INTO A 500 THAT WOULD EXCEED THE .040 OVER RULE.

4. ALL ENGINES MUST HAVE STOCK LENGTH STROKE, Resleeving a motor to a different size other than what it was originally is not allowed.

5. Additional ports may be added to OEM cylinders for that model

Drive & skies

1. Any primary or secondary clutch is allowed.

2. Must have full metal clutch guard

3. Brake must be functional.

4. Chain case can be relocated from stock position.

5. Chain case must be from a stock production snowmobile. No aftermarket or custom made cases allowed.

6. Any metal ski at least 20 inches in length is allowed.

Track and Suspension

1. Any suspension and track combination allowed.

2. No slide lube allowed.

3. Additional idler wheels may be added.

4. Must have attached snow flap that is a maximum of one inch above the ice with driver seated.

Frame and Body

1. Tunnels must be factory originated with a serial number and match the manufacturers installed tunnel for that make and model. Reproduced

tunnels and bulkheads are allowed, but must be built to EXACT OEM specs, size and shape EXCEPT for tunnel length. Aftermarket tunnels can be

made longer to accommodate a longer track and suspension. Lightening or additions to the OEM tunnel are allowed as long as structural integrity and safety are not compromised.

2. Dash and shroud must remain OEM appearing. The outside gas tank shell must remain intact and in its OEM location. The fuel tank may be modified to accommodate a fuel cell. All fuel must be contained in the OEM for that model fuel tank location. The use of a fuel cell used within the above rule will not compromise the OEM appearance. 3. Belly pans may not be removed and must have stock appearance and location.

3. Reasonable alterations to hood to facilitate cooling are allowed.

4. Measures taken to strengthen these components are allowed.

5. Hood insulation may be removed. PDC and sno pro hoods allowed , but they must meet the belly pan in its stock OEM location.

6. Windshield may be removed or trimmed.

7. Headlight may be removed.

8. Seats must cover the length of the tunnel and must be a minimum of 3" in thickness.

9. Tunnel extensions are allowed.

10. All tunnels must have an additional layer of aluminium (.060) added to either the top or bottom side of the

tunnel. It must run from the very back of the tunnel up to the bulk head area. This is a safety rule to protect driver from a cleat failure.

11. Carbon fiber components may be used.

Electrical

1. Programmable Ignitions Allowed

 

Vintage Open Modified Classes

 

300all   340 F/A   340 L/C   440 F/A   440 L/C   500 F/A   500 L/C   650F/A   660 L/C   Open cc

500cc Heavy Driver must weight 200lbs   500CC + Heavy Driver must weight 200lbs

 

Open-Mod Sled Requirements

 

1. Sled must pass safety inspection prior to racing

2. Clutch covers for Open Mod must have full facial coverage and 360 degree elliptical coverage in the direction of the clutch or belt travel. Cover must be .090-inch 6061T6 aluminium or better and be covered with 6inch belting. If cover fastens to the belly pan, the area bellow clutches must be covered with .090 inch 6061T6 aluminium or better. If cover is .125 inches thick, belting is not required.

Engine

1. Any 1995 or older snowmobile engine allowed.

2. No billet or aftermarket engine components allowed other than pistons and crank cases.

3. All internal and external engine components like, crank, rods, etc must remain 1995 and older.

4. Any external modifications allowed to original cases to allow the following Reed cage induction to a Rotary Valve or Piston Port case.

5. Insert heads are allowed.

Carburetion

1. Any carburetor allowed.

2. Use of nitrous, turbo chargers and superchargers are not allowed. Gasoline only, no power adders allowed, fuel may be tested. Non oxygenated fuel only

Drive & skies

1. Any primary or secondary clutch is allowed.

2. Must have full metal clutch guard and covered chain.

3. Brake must be functional.

4. Any metal ski at least 20 inches in length is allowed.

Track and Suspension

1. Any track and suspension combination allowed.

2. No slide lube allowed.

3. Must have attached snow flap that is a maximum of one inch above the ice surface with driver seated.

Frame and Body

1. Sled must be vintage in appearance.

2. Any chassis will be allowed but must pass safety inspection.

3. Front suspension must have minimum of 1" of travel. IFS front ends will only be allowed on 800cc sleds or larger, or if the chassis came factory IFS pre 1982 Ex. Sno pro chassis.

4. All tunnels must have an additional layer of aluminium (.060) added to either the top or bottom side of the tunnel. It must run from the very back of the tunnel up to the bulk head area. This is a safety rule to protect driver from a cleat and stud failures.

Electrical

1. Programmable Ignitions Allowed

Classic Super Stock

600   700   800

1. Snowmobile must have original engine, hood, air box or foam filters, carburation, cowl, gas tank, seat, windsield, clutching. No light weight aftermarket components allowed

2. Carburators can not be bored

3. Maximum overbore cannot exceed .020 inches

4. Stock suspension must be used. Stock shocks must remain. Ideler wheels may be added.

5. Any internal engine modification is allowed.

6. Rubber tracks only. No cutting or shaving allowed. R tracks allowed

7. Aftermarket trail skis allowed.

8. Tunnels must remain stock length.

9. Any silenced aftermarket trail pipes are allowed.

10. Sled must meet all safety requirements. 

Classic Pro Stock

600   700   800   1000

1. Sled must have stock appearance body, hood, and seat.

2. Engine must match chassis.

3. Any carburation allowed.

4. Any silenced exhaust allowed.

5. Skis must be a minimum of 20" long

6. Any aftermarket track and suspension is allowed. Minimum of 2" of travel required. 

7. Track lug height must be a minimum of 1/2" Rubber tracks only. Cleated not allowed.

8. Any OEM ignition allowed

9. Studder boxes are not allowed

10. Maximum overbore is 2% for the class

11. Seats must remain at least 6" thick.

12. Sleds must meet all safety requirements. 


 

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