2005 Ski-Doo Racing Handbook, Page 62Get this manual
SECTION 03CHASSIS PREPARATION
When installing carbide inserts, start with 100 mm (4 in) of carbide in front of line projected from the center line of the ski leg and 125 mm (5 in) behind the lineAlways keep the amount of carbide behind the line longer than in frontA15F2IA
A122 mm (5 in) 147 mm (6 in)
98 mm (4 in) 171 mm (7 in)