1987-2009 Yamaha ATV YFM350X Warrior Raptor Service Manual, Page 194Get this manual
INSPECTION AND REPAIR Refer to front brake inspection and repair except for following items
1Inspect:Caliper piston CD -Dust sealPiston seal -0- ring OamageScratches- Replace as set
2Inspect: -Brake pad Over wear limit
CDReplace as set
Brake pad wear limit: 1.0 mm (0.0394 in)