Checking The Clutch - Yamaha YXR70FX Service Manual

CLUTCH
EBS00299

CHECKING THE CLUTCH

1. Check:
• clutch housing
Heat damage/wear/damage → Replace.
• one-way clutch bearing
Chafing/wear/damage → Replace.
TIP:
_
• Replace the one-way clutch assembly and
clutch housing as a set.
• The one-way clutch bearing must be
installed with the flange side facing in.
2. Check:
• one-way clutch operation
M MMM M MMM M M MMM M
a. Install the one-way clutch bearing and
clutch carrier assembly to the clutch hous-
ing and hold the clutch carrier assembly.
b. When turning the clutch housing clockwise
È, the clutch housing should turn freely.
If not, the one-way clutch assembly is
faulty.
Replace it.
c. When turning the clutch housing counter-
clockwise É, the clutch housing and crank-
shaft should be engaged.
If not, the one-way clutch assembly is
faulty.
Replace it.
L LLL L LLL L L LLL L
3. Check:
• clutch shoe
Heat damage → Replace.
4. Measure:
• clutch shoe thickness
Out of specification → Replace.
Clutch shoe thickness
1.5 mm (0.06 in)
Clutch shoe wear limit a
1.0 mm (0.04 in)
4 - 68
ENG
M MMM M M MMM M M MMM M MMM
L LLL L L LLL L L LLL L LLL