Piston Pin Inspection - Yamaha XVS650 Service Manual

CYLINDERS AND PISTONS
ENG
PISTON PIN INSPECTION
1.1nspect:
• Piston pin
Blue discoloration/grooves ~ Replace,
then inspect the lubrication system.
2.Measure:
• Piston pin-to-piston clearance
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• Measure the piston inside diameter
C£>.
• Calculate the piston pin-to-piston clear-
ance using the following formula:
Piston pin-to-piston clearance
=
Bore size (piston pins)
(6) -
Outside diameter (piston pins)
®
Outside diameter (piston pin):
19.995 20.000 mm
(0.1872 0.7874 in)
.If out of specification, replace the piston.
Clearance (piston pin to piston):
0.004 ,.., 0.020 mm
(0.00016 .... 0.0008 in)
Measurement steps:
• Measure the piston pin outside diameter
®.
If out of specification, replace the piston
pin.
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