2004 Official factory service manual for Yamaha YFZ450S ATV Quad., Page 180Get this manual
A.CMAGNETO EBS00263
CHECKING THE STARTER CLUTCH 1Check: starter one-way clutch Cracksdamage Replace bolts Loose Replace with new one, and clinch the end of the boltStarter clutch bolt 16 Nm (1.6 kg, 11 ft lb) LOCTITE