Yamaha TTR125LM Owner's Service Manual page 346

FRONT WHEEL
Brake disc
1. Measure:
Brake disc deflection
Use the dial gauge 1.
Out of specification → Inspect wheel runout.
If wheel runout is in good condition,
replace the brake disc.
Disc deflection limit:
0.15 mm (0.006 in)
2. Measure:
Brake disc thickness a
Out of limit → Replace.
Disc wear limit:
Standard
3.0 mm
(0.12 in)
ASSEMBLY AND INSTALLATION
Front wheel
1. Install:
Wheel bearing 1
Spacer 2
Wheel bearing 3
Oil seal 4
NOTE:
Apply the lithium soap base grease on the
wheel bearing and oil seal lip when installing.
Install the wheel bearing so that the enclosed
side is facing outward.
Use a socket that matches the outside diam-
eter of the race of the bearing.
Left side of wheel bearing shall be installed first.
Install the oil seal with its manufacture's
marks or numbers facing outward.
CAUTION:
Do not strike the inner race of the bearing.
Contact should be made only with the outer
race.
5 - 3
CHAS
<Limit>
2.5 mm
(0.10 in)
New