2004 Official factory service manual for Yamaha YFZ450S ATV Quad., Page 289Get this manual
FRONT ARMS AND FRONT SHOCK ABSORBER ASSEMBLIES
fAttach the assembled ball joint remover installer, new ball joint (with rubber boot and retaining ring) B, installer spacer and installer washer to the lower front arm ANOTE: Do not tap or damage the top of the ball joint Installer spacer must be aligned with the projection on the head of the ball joint BgRemove the ball joint removerinstallerhInstall new circlipNOTE: Always use new ball joint set_