Piston Pin And Bearing Inspection - Yamaha WaveRunner GP1300R Service Manual

POWR
PISTONS
2. Measure:
• End gap
(using a thickness gauge 1)
Out of specification → Replace the pis-
ton rings as a set.
End gap:
0.45–0.60 mm (0.018–0.024 in)
NOTE:
Push the piston ring into the cylinder with the
piston crown.

Piston pin and bearing inspection

1. Check:
• Piston pins
• Bearings
Signs of heat discoloration → Replace.
2. Measure:
• Piston pin outside diameter
(using a micrometer 1)
Out of specification → Replace.
Piston pin outside diameter:
Standard:
21.995–22.000 mm
(0.8659–0.8661 in)
Limit:
21.990 mm (0.8657 in)
3. Check:
• Piston-pin-to-piston free play
(with the piston pin in the piston as
shown)
Free play → Replace the piston pin, pis-
ton, or both.
5-35
E