Yamaha XP500, Service Manual

Page: 409 / 559

5 - 78
ENG
CRANKCASE AND CRANKSHAFT
a. Clean the surface of main journal and jour-
nal bearings.
b. Check the bearing surface. If the bearing
surface is worn or scratched, the bearings
should be replace.
NOTE:
If either of the right or left journal bearing is
worn or scratched, both bearings should be
replaced as a set.
c. Measure the outside diameter
a
of each
main journal at two places. If it is out of
specification, replace the crankshaft.
d. Measure the inside diameter
b
of each
journal bearing at two places.
e. If journal bearing inside diameter is “45.03”
and crankshaft journal outside diameter is
“44.98”, then the main journal oil clearance
is:
If the oil clearance is out of specification,
select a replacement bearings.
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Main journal oil clearance:
Journal bearing inside diameter –
Main journal outside diameter =
45.03 – 44.98 = 0.05 mm