30
Remove piston
Remove circlip of piston pin by pliers
Caution: No circlip drop into crankcase is allowed
Press piston pin out of piston, and then remove
the piston.
Piston/Piston rings
’ check
Measure clearance between piston rings and their
grooves by thickness gauge A.
Standard data
：
1
st
ring
：
0.02
～
0.06
2
nd
ring
：
0.02
～
0.06
Limit data
：
1
st
, 2
nd
ring
：
0.16
Remove piston ring
Caution
：
No damage to piston rings
during disassembling is allowed
Insert each piston ring into cylinder and measure
clearance.
Standard data
：
1
st
ring
：
0.15
～
0.3
2
nd
ring
：
0.20
～
0.35
Limit data in maintenance
：
1
st
ring
：
0.65
2
nd
ring
：
0.7
Check abrasion or damage on piston and
its grooves.