2008 Yamaha Raptor 250SE / 250SE2 Factory Service Manual, Page 90Get this manual
CHECKING THE FRONT BRAKE PADS CHECKING THE REAR BRAKE PADS
2Check: brake pads Wear indicator groove almost disappearedReplace the brake pads as setRefer to "FRONT AND REAR BRAKES" in chapter 6Brake pad wear limit 1.5 mm (0.06 in) 3Operate the brake lever4Install: front wheels Refer to "FRONT AND REAR WHEELS" in chapter 6