Brake Inspection And Repair - Yamaha YTZ250S 1986 Service Manual

Master cylinder
kit
6. Remove the master cylinder cup
assembly. Note that the cylinder cups are
installed with the larger diameter (lips) in-
serted first.
Brake Inspection and Repair
Recommended brake component
Replacement schedule:
Brake pads: As required
Piston seal, dust seal:
Every two years
Brake hoses: Every four years
Brake fluid:
Replace only when brakes are
disassembled.
1. Replace the caliper piston if it is
scratched.
2. Replace any brake pad that is worn
beyond limits. Always replace the brake
pads as a set.
See "Brake Pad Replacement" for a
listing of the parts to be replaced when
pads are replaced.
4-5
Wear limit: 0.8 mm (0.032 in)
1. Wear limit
3. Replace the piston seals if damaged.
Replace the seals every two years.
4. Inspect the master cylinder body; replace
if scratched. Clean all the passages with
new brake fluid.
5. Inspect the brake hoses. Replace the
hoses every four years or immediately if
cracked, frayed, or damaged.
6.
Check for wear and deflection of the
disc. If the disc is worn beyond minimum
thickness or if deflection exceeds the
specified amount, replace the disc.
Maximum deflection:
0.15 mm (0.006 in)
Minimum disc thickness:
3.5 mm (0.14 in)
Dial gauge
Brake disc