17
125
-
160 cc
C
WORKSHOP MANUAL
Standard
Service limit
125 cc
160 cc
Piston
Piston assembly direction
“IN” on intake side
—
Piston outside diameter
52.37-52.39 mm 57.97-57.99 mm
52.32/57.92 mm
Piston pin bore diameter
15.002-15.008 mm
15.04 mm
Piston pin diameter
14.994-15.000 mm
14.980 mm
Connecting rod small end diameter
15.016-15.034 mm
15.050 mm
Cylinder / piston tolerance
0.02-0.04 mm
15.05 mm
Piston / piston pin tolerance
0.002-0.014 mm
0.080 mm
Piston pin / small end tolerance
0.016-0.040 mm
0.040 mm
Piston rings / grooves
tolerance
Ring (1)
0.020-0.044 mm
0.070 mm
Ring (2)
0.020-0.044 mm
0.070 mm
Ring gap
Ring (1)
0.15-0.30 mm
0.45 mm
Ring (2)
0.10-0.25 mm
0.45 mm
Scraper ring
0.2-0.7 mm
0.9 mm
Piston ring assembly direction
punch marking at top
—
Tightening torques
Cylinder head screw
10 N
*
m ± 15%
Tensioner screw
35 N
*
m ± 15%
Cylinder screw
10
N
*
m ± 15%
Valves cover screw
10 N
*
m ± 15%
Cylinder head nut
3
0 N
*
m ± 15%
Timing sprocket screw
10 N
*
m ± 15%
Chain tensioner screw
10 N
*
m ± 15%
CYLINDER HEAD, VALVES, CYLINDER, PISTON
