Yamaha TT-R125(R) Owner's Service Manual page 384

FRONT WHEEL (TT-R125LW)
Brake disc
1. Measure:
2. Measure:
ASSEMBLY AND INSTALLATION
Front wheel
1. Install:
NOTE:
Apply the lithium soap base grease on the
G
wheel bearing and oil seal lip when installing.
Install the wheel bearing so that the enclosed
G
side is facing outward.
Use a socket that matches the outside diam-
G
eter of the race of the bearing.
Left side of wheel bearing shall be installed first.
G
Install the oil seal with its manufacture's
G
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 - 10
Brake disc deflection
G
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)
Brake disc thickness a
G
Out of limit → Replace.
Disc wear limit:
Standard
3.0 mm
(0.12 in)
Wheel bearing 1
G
Spacer 2
G
Wheel bearing 3
G
Oil seal 4
New
G
CHAS
<Limit>
2.5 mm
(0.10 in)