2002 Yamaha YFM660 Grizzly factory service and repair manual, Page 224Get this manual
TRANSMISSION
REMOVING THE TRANSMISSION 1.Remove: Sift cam Sift fork assembly Removing steps: Pull out the guide bar from the left crankcasePush down on the drive shaft, and then slide the shift fork assembly to remove the shift fork cam followersRemove the shift camRemove the shift fork assembly