Yamaha FX10X Service Manual page 506

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CONNECTING RODS AND PISTONS

10. 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-

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

Crankshaft-pin-to-big-end-bearing

0.033 ~ 0.050 mm

(0.0013 ~ 0.0020 in)

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