8. CYLINDER/PISTON
8-5
MXU 300/250
Remove the piston pin clip.
Press the piston pin out of the piston and
remove the piston.
INSPECTION
Inspect the piston, piston pin and piston
rings.
Remove the piston rings.
Clean carbon deposits from the piston ring
grooves.
Inspect the piston wall for
wear/scratches/damage.
If any defects are found, replace the piston
with a new one.
Install the piston rings onto the piston and
measure the piston ring-to-groove clearance.
Service Limits (replace if over):
Top: 0.09 mm (0.0036 in)
2nd: 0.09 mm (0.0036 in)
Piston
Clip
Piston Pin
Towel
Place a clean shop towel in the crankcase
to keep the piston pin clip from falling
into the crankcase.
＊
Take care not to damage or break the
piston rings during removal.
＊
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