2005 Ski-Doo Racing Handbook, Page 426Get this manual
SECTION 11COMPETITION PREPARATION
Use stock springs but limit suspension travel with limiter straps or stops to 76 mm (3 in), measured from the front arm to bumper stop Shorter limiter straps will be requiredOn grass, more weight transfer can be used to keep the weight off the skisOn ice, run the limiter very short to keep ski lift to minimum
Rear Suspension