USXC Racing Rules

The 2019-2020 USXC Racing Rules Book

Rule Book updated occasionally. Last updated on 4/30/2019.

All-Terrain Note:

All-terrain events will need a State Trail permit.

The USXC has announced 18 classes for the 2019-2020 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 (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.