USXC Racing Rules

The 2018-2019 USXC Racing Rules Book

Rule Book updated occasionally. Last updated on 3/7/2019.

All-Terrain Note:

All-terrain events will need a State Trail permit.

The USXC has announced 19 classes for the 2018-2019 season. Below are a list of classes for all drivers.

(120 & 200 Classes - Racing for all 120 and 200 class sleds will be run by KC PRO West Racing at their own events, they will have their own rules, etc. Here is a link to their website for more information - http://kcprowest.net . USXC will not be racing 120 or 200 class machines.)

Junior 10 - 13 - Max 600 cc fan cooled stock sleds or 85-HP sleds with OEM throttle limiter. Or 600 Limited class sleds with OEM throttle limiter and exhaust valves closed.
Junior 14 - 17 - Max 600 cc fan cooled or 85-HP class sleds or 600 Limited class sleds with OEM throttle limiter.
Junior 10 - 13 Girls - Max 600 cc fan cooled stock sleds or 85-HP class sleds with OEM throttle limiterOr 600 Limited class sleds with OEM throttle limiter and exhaust valves closed.
Junior 14 - 17 Girls
- Max 600 cc fan cooled or 85-HP class sleds or 600 Limited class sleds with OEM throttle limiter.
Vintage & Vintage Legends - Legends are over 50, 1984 and older leaf spring sleds, 500 cc fan max & 440 cc liquid max.
Classic IFS - (2 classes) 18 to 50, and Classic IFS Legends over 50. 1980 to 1998 IFS, 600 cc max. open shocks, any track, chassis, engines, hoods, seats, suspension & geometry must remain stock as produced.
Expert 600 Limited (Replaces Expert 85 and Trail) – Experienced level riders. 85hp class sleds or 600cc Limited class sleds with OEM throttle limiter.
Sport 600 Limited (Replaces Sport 85)– Beginner entry level class on expert class sleds. 600cc Limited class sleds with OEM throttle limiter.
Sport 600 (EFI sleds - ISR Factory Stock 600 class) -
Up to 600cc liquid cooled sleds, 1.25 track lug height, must be 18 years of age or 16 years of age with prior race experience and race director approval.
Sport 600 Improved - 600cc carb or EFI model sleds. No internal mods allowed, external engine mods only.
Womens (EFI sleds - ISR Factory Stock 600 class) - 600cc liquid cooled, 1.25 track lug height, must be 18 years of age or 16 years of age with prior race experience and race director approval.
Masters 40+ (EFI sleds - ISR Factory Stock 600 class) - 600cc liquid cooled, 1.25 track lug height.
Masters 50+ (EFI sleds - ISR Factory Stock 600 class) - 600cc liquid cooled, 1.25 track lug height.
Semi Pro Factory 600 (EFI sleds - ISR Factory Stock 600 class) - Up to 600cc, liquid cooled, 1.25 lug height.
Semi Pro IMP (Carb or EFI model sleds) External Engine mods allowed.
Pro Factory 600 (EFI sleds - ISR Factory Stock 600 class) - 600 cc liquid cooled, 1.25 lug tracks, must be 18 unless prior race director approval.
Pro Open (ISR Pro Stock class - Carb or EFI model sleds) (ISR Enduro 600 Soo class - See USXC Rule book, page 21)- 600 cc liquid cooled, chassis and engine mods allowed, max limit of 1050cc on all 4 stroke sleds with chassis and engine mods allowed.