Yamaha XP500 Service Manual page 409

CRANKCASE AND CRANKSHAFT
5 - 78
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:
Main journal oil clearance:
Journal bearing inside diameter –
Main journal outside diameter =
45.03 – 44.98 = 0.05 mm
If the oil clearance is out of specification,
select a replacement bearings.
L LLL L LLL L L LLL L
ENG
L LLL L L LLL L L LLL L LLL