2017 Class Listing

 ** If you are of age or have race director approval a sport rider now may jump up and also race Semi Pro at the same race.  A Semi Pro rider can also jump up into the Pro Classes.  If you podium (top 3) in the advanced class you will be required to move up to the higher division at the next event.  **

120 stock– Ages 4/10 on a stock 120 sled (see 120 rules)

120 Improved – Ages 6/10 on an improved sled (see 120 rules)

120 Champ – Ages 6/10 on a champ sled (see 120 rules)

Jr. 10-13 – up to 550 fan w/gearing change (see rules) or Expert sled with 50% throttle block

Jr. 14-17 – up to 600 fan sled or Expert class sled

Jr. 10-13 Girls – up to 550 fan w/gearing change (see rules) or Expert sled with 50% throttle block

Jr 14-17 Girls – up to 600 fan sled or Expert class sled

Sport 85 – Under 85hp beginner class amateur

Expert 85 – Under 85hp experienced class amateur

Trail 600 – Beginner class amateur up to 600cc – Must be 18 years or older or have Race Director approval.

Trail 800 – Beginner class amateur up to 800cc – Must be 18 years or older or have Race Director approval.

IFS –  1980 to 1998 IFS, 600 cc max. open shocks, any track, chassis, engines, hoods, seats, susp. geometry must remain stock as produced.

SOO 600 – Enduro 600 SOO class – Sleds must be no older than 10 years old, 2006 & up.  See page 16 of ISR rules for more information.

Sport 600 Factory Stock – (EFI and ISR factory 600 sleds) up to 600cc liquid cooled., 1.25 lug. Must be 18 years or older or have Race Director approval.

Sport Open – (Carb or EFI sleds) 600cc liquid cooled, Improved chassis and external modification. Must be 18 years or older or have Race Director approval.

Women – up to 600cc liquid cooled, Must be 18+

PLUS 30 – 30+, 600cc liquid cooled, 1.25 lug

PLUS 40 –  40+, 600cc liquid cooled, 1.25 lug

Masters 50 –  50+ , 600cc liquid cooled, 1.25 lug

Semi-Pro Factory Stock 600 – (EFI and ISR factory 600 sleds) up to 600cc liquid cooled, 1.25 lug.  Must be 18 years or older or have Race Director approval.

Semi-Pro Improved – (Carb or EFI sleds) 600cc liquid cooled, Improved chassis and external modification. Must least be 18 years or older or have Race Director approval.

Pro Factory Stock 600– (EFI and ISR factory 600 sleds) up to 600cc liquid cooled, 1.25 lug.   Must be 18 years or older or have Race Director approval.

Pro Open 600– (Carb or EFI sleds) Improved chassis and engine modification. 4 stroke max limit of 1050cc w/chassis and engine mods allowed.  Must be 18 years or older or have Race Director approval

Snowbikes – if there are enough snowbikes we will break up the 1 class into the following 2 classes:

250 cc – 4 stroke

450 cc – 4 stroke

Vintage Classes – to be run only if there are more than 3 entries in each, otherwise there will need to be a total of at least 3 and they will all run in one class

Vintage I – 500cc and under, model must be 1982 or older.  Fan cooled, no liquids.  No studs, 3/4” track or leaf spring skis.  Stock or modified sleds allowed.

Vintage II – 400cc and under, model must be 1982 or older. Fan cooled, no liquids.  No studs, 3/4” track or leaf spring skis.  Stock or modified sleds allowed.

Don’t see a class you were looking for listed?

If you can bring us at least 3 riders and the sleds are within ISR rules, then we can create one for you!  Please contact Glynn at Glynn@RockMapleRacing.com for inquires.