Suzuki RA410, Manual

Page: 317 / 761

Piston Rings
To measure end gap, insert piston ring (1) into cylinder bore and
then measure the gap by using thickness gauge (2).
If measured gap is out of specification, replace ring.
NOTE:
Decarbon and clean top of cylinder bore before inserting pis-
ton ring.
1
2
Connecting Rod
Big-end side clearance:
Check big-end of connecting rod for side clearance, with rod
fitted and connected to its crank pin in the normal manner. If
measured clearance is found to exceed its limit, replace con-
necting rod.
Connecting rod alignment:
Mount connecting rod on aligner to check it for bow and twist
and, if limit is exceeded, replace it.
Limit on bow: 0.05 mm (0.0020 in.)
Limit on twist: 0.10 mm (0.0039 in.)
6A4-58 ENGINE MECHANICAL
Item Standard Limit
Top ring
0.12 – 0.27 mm
(0.0047 – 0.0106 in.)
0.7 mm
(0.0276 in.)
Piston ring
end gap
2nd ring
0.35 – 0.50 mm
(0.0138 – 0.0197 in.)
1.0 mm
(0.0394 in.)
Oil ring
0.10 – 0.40 mm
(0.0039 – 0.0157 in.)
1.5 mm
(0.0591 in.)
Item Standard Limit
Big-end side
clearance
0.11 – 0.31 mm
(0.0043 – 0.0122 in.)
0.35 mm
(0.0137 in.)