Section 03 ENGINES
Subsection 07 (ENGINE MEASUREMENT)
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1. Top of spark plug hole
NOTE: The liquid level in cylinder must not drop
for a few seconds after filling. If so, there is a
leak between piston and cylinder. The recorded
volumewouldbefalse.
– Let burette stand upward for about 10 minutes,
until liquid level is stabilized.
– Read the burette scale to obtain the quantity of
liquid injected in the combustion chamber.
NOTE: When the combustion chamber is filled to
top of spark plug hole, it includes an amount of
2.25 cc corresponding to the spark plug well.
– Repeat the procedure for the other cylinder.
– Install a thicker or thinner cylinder/crankcase
gasket (refer to Parts Catalogs)inordertoob-
tain the specified combustion chamber volume
or the nearest.
USED PISTON MEASUREMENT
Note the measurement on the piston dome.
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1. Piston dome
2. Piston measurement
Using a micrometer, measure piston skirt at
15 mm (.590 in) perpendicularly (90°)topiston
pin.
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A
1. Measuring perpendicularly (90°) to piston pin axis
A. 15 mm (.590 in)
CYLINDER/PISTON CLEARANCE
Used and New Pistons
IMPORTANT: Make sure used piston is not worn
more than specified. See USED PISTON MEA-
SUREMENT above.
Take the measurement on the piston dome.
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