2005 Ski-Doo Racing Handbook, Page 425Get this manual
SECTION 11COMPETITION PREPARATION
Best performance and speed is achieved by installing 136" 15" with 1.75" lug height 136" Track extension kits are available in limited quantitiesContact Ski-Doo Race Deptfor availability and information
Use "finger" type track with 1.75" to 2.00" lug height profileBeginning of season or fresh snow, use track with 1.75" lug height and later in the year when the hill has lot of ice, use 2.00" lug height track Use 144" 15" track for best performance For information regarding chassis extension kits, contact Ski-Doo Race Dept Check with the race organization for rules regarding changing of tracks
Transmission
Clutch setups will be similar to Sno CrossDue to higher speeds than Sno Cross, an increase in gearing is required, depending on length and steepness of course
HILL CLIMBING