Suzuki GN125F, Service Manual

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E N G I N E
3-19
Make sure to fit the piston ring in the cylinder evenly
with the piston head.
09900-20803 Thickness gauge :
REASSEMBLY
Hold each piston ring with the piston rings properly
spaced and insert them into the cylinder.
Check to insure that piston rings are properly inserted
in the the cylinder skirt.
Install the piston rings in the order of oil ring, 2nd ring
and 1st ring. Do not align the gap of oil ring with
expander ring.
Piston rings should turn smoothly in the piston groove after
assembly.
The gaps of two piston rings should be staggered at 120°.
Carefully fit the piston rings to the piston with marked
side to the top
.
Clean the top, skirt or groove of the piston.
Install the piston and cylinder in the reverse order of removal.
Pay attention to the following points:
Fit the rings in the cylinder, and measure each ring end gap
with a thickness gauge. If any ring has an excess end gap,
replace the ring.
Piston ring end gap limit:
1st: 0.50 mm 2nd: 0.50 mm
09900-20605: Caliper gauge
Measure the conrod small end I D
. .
Conrod small end I.D.: limit: 14.04 mm
120
120
120
CAUTION
Be careful do not damage the piston ring and piston
when installing the piston ring. Make sure to position
the gaps of the top ring and 2nd ring as required.