Yamaha RX10K Supplementary Service Manual page 317

CRANKCASE
8. Measure:
S Piston pin bore inside diameter
Out of specification ! Replace the piston.
Piston pin bore inside diameter:
17.002 X 17.013 mm
(0.6694 X 0.6698 in)
9. Calculate:
S Piston pin to piston pin bore clearance
Out of specification ! Replace the piston pin
and piston as a set.
Piston pin to piston pin bore
clearance =
Piston pin bore size –
Piston pin outside diameter
Piston pin to piston pin bore
clearance
0.002 X 0.022 mm
(0.00008 X 0.0009 in)
<Limit>: 0.072 mm (0.0028 in)
10. Measure:
S Runout
Use the V-blocks and a dial gauge.
Out of specification ! Replace the crank-
shaft.
Dial gauge:
90890-03097, YU-03097
Crankshaft runout:
0.03 mm (0.0012 in)
5-50
ENG