2005 Ski-Doo Racing Handbook, Page 389Get this manual
SECTION 082005 MX 550 AND 380 FC
A03C2AA
A03C22A
1Remove fan with pulley half
FAN BELT PROPERLY INSTALLED ON BOTTOM PULLEY AND FAN SHAFT 1Bottom pulley 2Fan shaft 3Starting pulley
Remove fan beltLeave shims and second half pulley in placeRefer to the following photo
Reinstall fan assembly on fan shaftTemporarily tighten fan nutCAUTION: When reinstalling fan assembly, ensure that key is properly positioned into fan shaft keyway