13.4 Piston
13.4.1 Disassembly
Remove the piston pin retainer.
Attentions: Do not drop the retainer to the crankcase.
Remove the piston pin and to remove the piston.
Check piston, piston pin and piston ring
Remove piston ring
Attentions: do not break or damage piston ring
To remove the carbon deposits in the piston ring groove
Remove piston rings and put them in the bottom of the
cylinder
Attentions：press the piston ring into the cylinder with piston
head
Measure the end gap of piston ring
Allowable limit: 0.05mm
Measure the inside diameter of piston pin hole
Allowable limit: 12.04mm
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