National Classes

Class

Description

Points Races

Pro Open Max 600cc 2 stroke, 1050cc 4 stroke All Events
Pro AM Plus 30 *Super Stock designated models – Refer to ISOC Official Rulebook All Events
Pro AM Women *Super Stock designated models – Refer to ISOC Official Rulebook All Events
Pro Lite *Super Stock designated models – Refer to ISOC Official Rulebook All Events
Snow Bike  Up to 700cc, naturally aspirated, follow all ISR General Snocross Rules, Age 15+, no Studs All Events
Sport *Super Stock designated models – Refer to ISOC Official Rulebook All Events – Best 12 Round Scores of 16
Sport Lite *Super Stock designated models – Refer to ISOC Official Rulebook N/A
Junior 16-17 Maximum 500cc Liquid Cooled, 600cc Fan Cooled, 600cc “Throttle Restricted” Super Sport and all Yamaha Phazer models All Events – Best 6 Round Scores of 8
Junior 14-15 Maximum 500cc Liquid Cooled, 600cc Fan Cooled, 600cc “Throttle Restricted” Super Sport and all Yamaha Phazer models All Events – Best 6 Round Scores of 8
Jr. 10-13 Refer to ISR rulebook, pages 17-18 here All Events – Best 6 Round Scores of 8
Jr. Girls 9-13 Refer to ISR rulebook, pages 17-18 here All Events – Best 6 Round Scores of 8
Transition 8-10 & 8-12 Maximum 300cc Fan Cooled/AC 500cc All Events – Best 6 Round Scores of 8
120 Champ (Age 6-12) Modified 120cc All Events – Best 6 Round Scores of 8

*Super Stock designated units conform to ISR Super Stock 600 Engine Limitations


If You Run This You Can Also Run This*
Pro Open Pro AM Plus; Pro AM Women
Pro AM Plus 30 Pro Open OR Pro Lite OR Sport OR Sport Lite
Pro AM Women Pro Open OR Pro Lite OR Sport OR Sport Lite
Pro Lite Pro AM Plus; Pro AM Women
Sport Sport Lite (if not top 30 in previous season’s Sport points) OR Pro AM Plus OR Pro AM Women; Jr. 14-17
Sport Lite Jr. 14-15, Jr. 16-17 OR *Sport Lite can run Sport (if not top 30 in previous year’s Sport points)
Junior 16-17 Jr. 14-15 (if age appropriate); Sport Lite/Sport
Junior 14-15 Jr. 16-17 ; Sport Lite/Sport
Jr. 10-13/Jr. Girls 9-13 Age appropriate classes
Transition 8-10 & 8-12 Age appropriate classes
120 Champ (Age 6-12) Age appropriate classes

*All riders must fit into appropriate age/gender class if age/gender specific class

Revised 9/8/2016