2004 Ski-Doo Racing Handbook, Page 247Get this manual
SECTION 08COMPETITION PREPARATION
STOCK CLASS PREPARATION
NOTE: Any machining andor grinding is illegal in stock class racingKeep your machine legal! 1Remove and disassemble the engine according to correct Shop Manual procedures2With the crankshaft resting in the lower half of the crankcase, set up dial indicator and check the run out of the crankshaft at both endsYou should see no more than 0.05 mm (0.002 in) run outIf you have the capability, adjust the crankshaft as close to perfect as possibleA01C0RB