Yamaha FX Nytro 2008 Manuel D'atelier page 500

CONNECTING RODS AND PISTONS
INSPECTION
NOTE:
Measure cylinder bore "C" by taking side-to-side
and front-to-back measurements of the cylinder.
Then, find the average of the measurements.
5-59
1. Inspect:
• Piston wall
• Cylinder wall
Vertical scratches → Replace the crankcase,
and replace the piston and piston rings as a
set.
2. Measure:
• Piston-to-cylinder clearance
Measurement steps:
1st step:
• Measure cylinder bore "C" with the cylinder bore
gauge 1.
Cylinder bore "C"
Taper limit "T"
Out of round "R"
"C" = maximum of D ~ D
1
"T" = maximum of D or D
1
or D
6
"R" = maximum of D D
1,
D D or D
2, 4 6
• If out of specification, replace the crankcase,
and the piston and piston rings as a set.
ENG
82.000 ~ 82.010 mm
(3.2283 ~ 3.2287 in)
0.050 mm (0.0020 in)
0.050 mm (0.0020 in)
6
– maximum of D
2 5
or D – maximum of
3 5