Piston Inspection; Service Point - Yamaha WaveRunner XL700 Supplementary Service Manual

POWR
PISTON

SERVICE POINT

Piston inspection

1. Eliminate:
S Carbon deposits
From the piston crown and ring groove.
2. Inspect:
S Piston wall
Score marks ! Repair or replace.
X
Use #600 800 grit wet sandpaper.
NOTE:
Sand in a criss-cross pattern. Do not sand ex-
cessively.
3. Measure:
S Piston skirt diameter
Use micrometer.
Out of specification ! Replace.
Piston diameter
X
80.925 80.950 mm
X
(3.186 3.187 in)
4. Calculate:
S Piston clearance
Out of limit ! Replace piston, piston rings as
a set.
PISTON
=
CLEARANCE
Piston clearance:
0.080
(0.0031
29
Distance a
10 mm
(0.39 in)
CYLINDER PISTON
–
BORE DIAMETER
X
0.085 mm
X
0.0033 in)