16
125
-
160 cc
C
WORKSHOP MANUAL
CYLINDER HEAD, VALVES, CYLINDER, PISTON
Standard
Service limit
125 cc
160 cc
Valve guide
Valve stem outside diameter IN
4.975-4.990 mm
4.965 mm
EX
4.955-4.970 mm
4.945 mm
Valve guide inside diameter
IN
5.000-5.012 mm
5.040 mm
EX
5.000-5.012 mm
5.040 mm
Valve stem to guide
clearance
IN
0.100-0.037 mm
0.075 mm
EX
0.030-0.057 mm
0.095 mm
Valve guide height
IN/EX
11.9-12.1 mm
—
Valve seating line height
IN/EX
0.9-1.1 mm
1.8 mm
Valve springs
Length
(Outer spring/inner spring)
IN/EX
35.0-32.3 mm
33.5-30.8 mm
Cylinder
Internal diameter
52.400-52.419 mm 58.00-58.019 mm 52.449 mm 58.049 mm
Top face flatness
—
0.05 mm
Taper
—
0.05 mm
