Usually 300 miles is the break-in time. However, you should go WOT during your break in, just not for long spurts of time, less than 1-2 seconds. Be sure to work it up and down the RPM ranges. Also let it warm up well before riding.
A forum community dedicated to snowmobile owners and enthusiasts. Come join the discussion about performance, racing, troubleshooting, trails, maintenance, riding tips, modifications, classifieds, gear, and more!