Yamaha YZ250 Owner's Service Manual page 396

FRONT BRAKE AND REAR BRAKE
EC5A3000
REMOVAL POINTS
EC5A3101
Brake fluid
1. Remove:
[Front]
9 Master cylinder cap 1
[Rear]
9 Master cylinder cap 1
9 Protector
NOTE:
Do not remove the diaphragm.
A Front
B Rear
2. Connect the transparent hose 2 to the
bleed screw 1 and place a suitable contain-
er under its end.
A Front
B Rear
3. Loosen the bleed screw and drain the brake
fluid while pulling the lever in or pushing
down on the pedal.
cC
9 Do not reuse the drained brake fluid.
9 Brake fluid may erode painted surfaces or
plastic parts. Always clean up spilled fluid
immediately.
EC533301
Caliper piston
1. Remove:
9 Caliper piston
Use compressed air and proceed carefully.
w
9 Cover piston with rag and use extreme cau-
tion when expelling piston from cylinder.
9 Never attempt to pry out piston.
Caliper piston removal steps:
9 Insert a piece of rag into the caliper to lock
one caliper.
9 Carefully force the piston out of the caliper
cylinder with compressed air.
A Front
B Rear
5-14
CHAS