Yamaha GP800R WaveRunner 2003, Service Manual

Page: 111 / 247

5-26
POWR
E
PISTONS
2. Measure:
●
End gap
(with a thickness gauge
1 )
Out of specification
→
Replace the
piston rings as a set.
NOTE:
Push the piston ring into the cylinder with
the piston crown.
End gap:
0.30–0.45 mm (0.012–0.018 in)
Piston pin and bearing inspection
1. Inspect:
●
Piston pins
●
Bearings
Signs of heat discoloration
→
Replace.
2. Measure:
●
Piston pin outside diameter
(with a micrometer
1 )
Out of specification
→
Replace.
3. Check:
●
Piston pin-to-piston free play
(with the piston pin in the piston as
shown)
Free play
→
Replace the piston pin,
piston or both.
Piston pin outside diameter:
Standard:
21.995–22.000 mm
(0.8659–0.8661 in)
Limit:
21.990 mm (0.8657 in)