Balancer Shaft - Yamaha VMX12 96 Supplementary Service Manual

INSPECTION AND REPAIR

BALANCER SHAFT

1. Measure:
S Oil clearance (balancer shaft bearing)
Out of specification ! Replace bearing.
Measurement steps:
F Clean the bearings, balancer shaft and bear-
ing portions of the crankcase.
F Place the crankcase (upper) on a bench in an
upside down position.
F Install the upper half of the bearings and the
balancer shaft into the crankcase (upper).
F Put a piece of Plastigauge on each balanc-
er shaft journal.
F Install the lower half of the bearings into the
crankcase (lower) and assemble the crank-
case halves.
NOTE:
Do not move the balancer shaft until the oil
clearance measurement has been completed.
F Tighten the bolts to specification in the tight-
ening sequence cast on the crankcase.
F Remove the crankcase (lower) and lower half
of the bearings.
F Measure the compressed Plastigauge
width a on each balancer shaft journal. If oil
clearance is out of specification, select a re-
placement bearing.
–11–
ENG
Oil clearance:
0.020 X 0.048 mm
(0.0008 X 0.002 in)
Bolt (crankcase-M8):
24 Nm (2.4 mSkg, 17 ftSlb)
E