2008 Yamaha Raptor 250SE / 250SE2 Factory Service Manual, Page 92Get this manual
CHECKING THE BRAKE HOSES BLEEDING THE HYDRAULIC BRAKE SYSTEM
2Check: front brake hoses front brake pipe rear brake hose CracksweardamageReplace3Check: brake hose clamps LoosenTighten4Hold the machine in an upright position and apply the front or rear brake5Check: brake hoses Apply the brake lever or brake pedal several timesFluid leakageReplace the hoses or pipeRefer to "FRONT AND REAR BRAKES" in chapter 66Install: front fender seat Refer to "SEAT, FENDERS AND FUEL TANK"