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8. CYLINDER/PISTON MXU 250R/300R
PISTON RING INSTALLATION
Install the piston rings onto the piston.
Apply engine oil to each piston ring.
· Be careful not to damage or break the
piston and piston rings.
· All rings should be installed with the Top
markings facing up.
· After installing the rings, they should Second
rotate freely without sticking. Side Rail
Oil Ring
Side Rail
Measure the connecting rod small end I.D.
Service Limit (replace if over):
17.06 mm (0.6824 in)
Measure the connecting rod to piston pin
clearance.
Service Limit (replace if over):
0.06 mm (0.0024 in)
8-8