Section 04 ENGINE (2-STROKE)
Subsection 04 (TOP END)
A
F01D8AA
1
2
1. Measuring perpendicularly (90°)topistonpinaxis
2. Auxiliary transfer port
A. 16 mm (5/8 in)
Cylinder Out of Round
Using a cylinder bore gauge, measure cylinder
diameter at 16 mm (5/8 in) from top of cylinder.
Measure diameter in piston pin axis direction
then perpendicularly (90°) to it. If the difference
between readings exceed specification, cylinder
should be rebored and honed or replaced.
A
F01D8BA
A
1
2
1. Measuringinpistonpinaxis
2. Measuring perpendicularly (90°) to piston pin axis
A. 16 mm (5/8 in)
USED PISTON MEASUREMENT
Note the measurement on the piston dome.
F00D0EA
2 1
1. Piston dome
2. Piston measurement
Using a micrometer, measure piston skirt perpen-
dicularly (90°) to piston pin according to the follow-
ing table.
ENGINE TYPE MAXIMUM “A” mm (in)
717
29 (1.142)
smr2004-Complete Line Up 113
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