Yamaha XVS650 Service Manual page 168

CRANKSHAFT AND CONNECTING RODS
ENG
.If journal bearing inside diameter is
"45.03 (1.7728 in)" and crankshaft journal
outside diameter is "44.98 (1.7709 in)"
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
(1.7728 -1.7709
=
0.0019 in)
If the oil clearance is out of specification,
select a replacement bearings.
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10.Select:
• Main journal bearing
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Selection of main journal bearings:
• Remove the main journal bearings out of
crankcase.
• Clean the bearing seat in the crankcase
where the bearing is fitted.
• Measure the diameter
®
of the bearing
seat at two places.
NOTE: _
If the diameter of the bearing seat in the
crankcase exceeds 49.02
mm,
the crankcase
should be replaced with a new one. The
new crankcase includes new journal bear-
ings. The each inside diameter of bearing is
normally 45.000 - 45.012 mm.
The average of the two values is used to
choose the bearing.
• Select the proper oversized main journal
bearing with the following table.
DIAMETER OF
COLOR CODE
THE BEARING SEAT
49.000 ... 49.010 mm
blue
(1.9291 - 1.9295 in)
49.011 ... 49.020 mm
(1.9296 .... 1.9299 in)
green
4·61
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