Piston Pin Check - Yamaha WaveRunner FZR-GX1800 Service Manual

POWR
Crankcase, connecting rod, and piston
3. Measure:
• Piston ring grooves
a
Out of specification → Replace the pis-
ton.
b
TIP
Before measuring the piston ring grooves,
c
eliminate any carbon deposits from the piston
ring grooves.
Piston ring groove:
Top ring
1.21–1.23 mm (0.0476–0.0484 in)
2nd ring
1.21–1.23 mm (0.0476–0.0484 in)
Oil ring
2.51–2.53 mm (0.0988–0.0996 in)
4. Measure:
• Piston ring side clearance
Out of specification → Replace the pis-
ton and piston rings as a set.
TIP
Before measuring the piston ring side clear-
ance, eliminate any carbon deposits from the
piston ring grooves and piston rings.
Piston ring side clearance:
Top ring
0.02–0.06 mm (0.0008–0.0024 in)
2nd ring
0.02–0.06 mm (0.0008–0.0024 in)
Oil ring
0.04–0.16 mm (0.0016–0.0063 in)

Piston pin check

1. Measure:
• Piston pin outside diameter a
Out of specification → Replace the pis-
ton pin.
Piston pin outside diameter a:
21.991–22.000 mm
(0.8658–0.8661 in)
5-106
a
:
b
:
c
:
a
:
b
:
c
:
E
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