Section02ENGINE
Subsection 09 (ENGINE MEASUREMENT)
A35C30A
A
1
1. Measuring perpendicularly (90°)topistonpinaxis
A. 33 mm (1.3 in)
Read the measurement on the cylinder bore
gauge. The result is the exact piston/cylinder
wall clearance. If clearance exceeds specified
tolerance, replace cylinder or rebore and install
oversize piston depending on engine.
NOTE: Make sure the cylinder bore gauge indica-
tor is set exactly at the same position as with the
micrometer, otherwise the reading will be false.
RING/PISTON GROOVE
CLEARANCE
Using a feeler gauge check clearance between
rectangular ring and groove. Replace piston if
clearance exceeds specified tolerance.
A35C31A
RING END GAP
Position ring halfway between transfer ports and
intake port.
NOTE: In order to correctly position the ring in the
cylinder, use piston as a pusher.
Using a feeler gauge, check ring end gap. Replace
ring if gap exceeds specified tolerance.
A01C0QA
2
1
TYPICAL
1. Transfer port
2. Intake port
CRANKSHAFT DEFLECTION
Crankshaft deflection is measured with a dial indi-
cator.
mmr2005-119 79
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