CLASS SPECIFIC RULES
| MINI Class Ages 5-12 |
| Mini Class Max 120cc Mini Mod Class Max 212cc |
| All minis must have skis, no wheel kits to maintain a fair race environment for ALL ages |
| MUST BE ACCOMPANIED BY PARENT OR GUARDIAN – NO EXCEPTIONS |
| Age Rules |
| 500 Stock – Ages 12+ |
| 600 Stock – Ages 14+ |
| 700+ - Must be 17 and Older |
| MUST BE ACCOMPANIED BY PARENT OR GUARDIAN – NO EXCEPTIONS |
| VINTAGE Classes |
| Single Cylinder Double Cylinder |
| Vintage = leaf spring front end |
| STOCK Classes |
| 500cc max 600cc max 700cc max 800cc max 850cc max 1000cc max |
| Snowmobiles must have OEM STOCK for the model: Frame, brakes, engine, Y pipe exhaust pipes, and muffler, carbs/ throttle bodies, clutches, fuel tank, oil tank, hood, seat, console, cooling system, track drivers, front and rear suspension. No light-weight parts allowed. |
| Stock OEM air box required. No modifications allowed. (An OEM air box may be substituted with commercially available air filters (i.e. KN Filters) made using paper or fabric elements.) |
| Engine reinforcing brackets that don’t allow the engine/clutches to move are NOT allowed. |
| Suspension may be limited to 2” remaining travel front and rear. |
| Any stock length ski allowed. |
| Any replacement springs allowed. |
| Suspension must be furnished by manufacturer. Use of a chain bolted and limiter strap to lower may be used. No ratchet straps may be used in rear suspension. If used in front skis, they must be securely fastened in front ski shocks if used. |
| Marginal snow wheels may be added or removed. |
| Wiper/speed tracks allowed. Tracks must be OEM width and length for model. Any race stud allowed to a max height of .750 (¾) inches over highest point track lug. Shaved tracks allowed, must be approved by Tech. A ½ min. lug height is required for shaved track. |
| Carb tuning parts allowed. EFI fuel restrictors or control boxes allowed (i.e. Boondocker, Power Commander exp) not tunable by driver during race. |
| Any stock type clutch tuning parts allowed. Changing of gears is allowed. |
| No machining/welding of clutches or clutch components is allowed. |
| External cool-down allowed. |
| IMPROVED STOCK Class |
| 500cc +1% 600cc +1% 700cc +1 % 800cc +1% 1000cc +1 % 4 stroke turbo |
| Everything allowed in BWGD Stock is allowed in Improved Stock |
| Track width may be changed as long as suspension or chassis not modified to allow change. Suspension mount using original mounting plates. |
| Engine, cylinders, heads, crank-case, carbs - must be OEM. Only internal modifications allowed. |
| Any functionally silenced exhaust allowed. |
| Aftermarket reeds allowed. |
| Any primary or secondary clutch allowed. |
| Jackshaft and driveshaft may be replaced. |
| Rear idler wheel may be replaced. |
| Lightweight hood may be used, must be stock appearing. |
| 800cc and 1000cc - any available long track kit may be added to OEM suspension. Rail extension must be welded. (No aftermarket suspensions allowed.) |
| 1000cc/open - any aftermarket cylinders and heads are allowed. Crankshaft or stroke may be changed. Any carb allowed. |
| PROSTOCK Classes |
| 600cc +2% 700cc +2% 800cc +2% 1000cc +2% |
| Any alterations allowed in BWGD Stock and Improved is also allowed in BWGD Prostock |
| Triple and Twin Chassis allowed, must be same brand. |
| Clutch guards and tunnel enclosures required. |
| Ski suspension: material substitution allowed. All components must be mounted in OEM location on the chassis. |
| Rear suspension: any track suspension allowed. Material substitution allowed. Ski and track suspension must have 2” travel. Any commercially available rubber track allowed. |
| Framed body material substitution allowed. Tubular Framed body material substitution allowed. Tubular front ends, “bulk heads” allowed. |
| Any carb, one venturi per cylinder. |
| Any ignition allowed. Launch control allowed. |
| Brakes on driveshaft recommended on aftermarket chassis. |
