Caliper Disassembly; Master Cylinder Disassembly - Yamaha YTZ250S 1986 Service Manual

3. Install the new brake pads. Replace the
following parts if pad replacement is
required.
• Pads
• Pad spring
NOTE:
Replace the pads as a set if either is found to
be worn to the wear limit.
Pad wear limit:
0.8 mm (0.032 in)
1. Wear limit
4. Tighten the pad retaining bolt and caliper
bolts to specification.
Pad retaining bolt:
23 Nm (2.3 m'kg, 17 ft·lb)
Caliper bolt:
35 Nm (3.5 m'kg, 25 ft·lb)
Caliper Disassembly
Bleed screw
4-4
1. Remove the brake hose from the caliper.
Allow the caliper assembly to drain into a
container.
2. Place the open hose end into the con-
tainer and pump the old fluid out of the
master cylinder.
3.
Remove the caliper cylinder securing
bolts from the front fork.
4. Remove the retaining bolt, pads, and
pad spring.
5.
Carefully force the piston out of the
caliper cylinder with compressed air.
Never try to pry out the piston .
WARNING:
Cover the piston with a rag. Use care so
that the piston does not cause injury as it
is expelled from the cylinder.
6. Remove the piston seals.
Master Cylinder Disassembly
1. Remove the brake hose.
2. Remove the brake lever and spring.
3. Remove the master cylinder from the
handlebar. Remove the cap, and drain
the remaining fluid .
4. Remove the master cylinder dust boot.
5. Remove the snap ring.