Yamaha FX10X 2008 Service Manual page 248

CONNECTING RODS AND PISTONS
10. Measure:
5-62
8. Measure:
• Piston pin bore inside diameter
Out of specification → Replace the piston.
Piston pin bore inside diameter:
19.004 ~ 19.015 mm
(0.7482 ~ 0.7486 in)
9. Calculate:
• 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 clear-
ance:
0.004 ~ 0.024 mm
(0.0002 ~ 0.0009 in)
<Limit>: 0.074 mm (0.0029 in)
• Crankshaft-pin-to-big-end-bearing clearance
Out of specification → Replace the big end
bearings.
Crankshaft-pin-to-big-end-bearing
clearance:
0.033 ~ 0.050 mm
(0.0013 ~ 0.0020 in)
ENG