Checking The Differential Gear Operation - Yamaha YXR70FX Service Manual

FRONT CONSTANT VELOCITY JOINTS, DIFFERENTIAL
GEAR AND DRIVE SHAFT
2. Adjust:
• gear lash
M MMM M MMM M
a. Select the suitable shims using the following
chart.
Too little gear
lash
Too large
gear lash
Ring gear shim
Thickness (mm)
L LLL L LLL L
EBS00177
CHECKING THE DIFFERENTIAL GEAR
OPERATION
1. Block the rear wheels, and elevate the front
wheels by placing a suitable stand under
the frame.
2. Remove the wheel cap from the axle nut
(right or left).
3. Measure the starting torque of the front
wheel (i.e., differential gear preload) with a
torque wrench.
TIP:
_
• Repeat this step several times to obtain an
average figure.
• During this test, the other front wheel will turn
in the opposite direction.
Front wheel starting torque
(differential gear preload)
4. Out of specification → Replace the differen-
tial gear assembly.
5. Within specification → Install the new cotter
pin and wheel cap.
7 - 19
DRIV
M MMM M M MMM M M MMM M
Reduce shim thickness.
Increase shim thickness.
0.1
0.2
0.3
0.4
L LLL L L LLL L L LLL L
New unit
17 ~ 25 Nm
(1.7 ~ 2.5 m · kg, 12 ~ 18 ft · lb)
Minimum
10 Nm (1.0 m · kg, 7.2 ft · lb)
M MMM M MMM
L LLL L LLL