Yamaha VMX12 96 Supplementary Service Manual page 16

INSPECTION AND REPAIR
F Put a piece of Plastigauge on each main
journal.
NOTE:
Do not put the Plastigauge over the oil hole in
the main journal of the crankshaft.
F Install the lower half of the bearings into the
crankcase (lower) and assemble the crank-
case halves.
NOTE:
S Align the projection of the bearing with the
notch in the crankcase.
S Do not move the crankshaft until the oil clear-
ance has been completed.
F Tighten the bolts to specification in the tight-
ening sequence cast on the crankcase.
*With a washer
F Remove the crankcase (lower) and lower half
of the bearing.
F Measure the compressed Plastigauge
width a on each main journal.
If oil clearance is out of specification, select a
replacement bearing.
4. Measure:
S Oil clearance (crank pin)
Out of specification ! Replace bearing.
Measurement steps:
CAUTION:
Do not interchange the bearings and con-
necting rod. They must be installed in their
original positions, or the correct oil clear-
ance may not be obtained causing engine
damage.
–8–
ENG
Bolt (Crankcase-M10):
40 Nm (4.0 mSkg, 29 ftSlb)
Oil clearance:
0.021 X 0.039 mm
(0.0008 X 0,0015 in)
E