Yamaha TT-R125EY Service Manual page 176

FRONT WHEEL AND FRONT BRAKE (TT-R125E)
Drum brake
1. Inspect:
• Brake shoe lining surface
Glazed areas → Polish.
Use coarse sand paper.
TIP
After polishing, wipe the polished particles with
a cloth.
2. Measure:
• Brake shoe lining thickness a
Out of specification → Replace.
Brake shoe lining thickness:
Standard
4.0 mm
(0.16 in)
TIP
Replace the brake shoes and springs as a set if
either is worn to the limit.
3. Measure:
• Brake drum inside diameter a
Out of specification → Replace.
Brake drum inside diameter:
Standard
110 mm
(4.33 in)
4. Inspect:
• Brake drum inner surface
Oil/scratches → Remove.
Oil Use a rag soaked in lacquer
thinner or a solvent
Scratches Use a emery cloth (lightly
and evenly polishing).
5-4
CHAS
<Limit>
2.0 mm
0.08 in)
<Limit>
111 mm
(4.37 in)