Yamaha CS50 - Piston, Cylinder and Cylinder Head (Cs50 Z)

ENG
ENGINE ASSEMBLY AND ADJUSTMENT
4-38
PISTON, CYLINDER AND CYLINDER HEAD (CS50Z L/C)
 Carburetor joint
 Reed valve
 Gasket
 Cylinder head
 Cylinder head gaskets
 Cylinder
 Cylinder gasket
 Piston rings
 Piston
 Piston pin
 Piston pin clips
 Bearing
 Thermo switch
 Thermostat
Piston-to-cylinder clearance:
0.029 ~ 0.042 mm
<Limit>: 0.1 mm
End gap (installed):
Top ring
0.15 ~ 0.35 mm
<Limit>: 0.60 mm
Second ring
0.15 ~ 0.35 mm
<Limit>: 0.60 mm
Ring side clearance:
Top ring
0.03 ~ 0.05 mm
Second ring
0.03 ~ 0.05 mm
Spark plug:
Type / manufacturer: BR8HS/NGK
Spark plug gap: 0.6 ~ 0.7 mm
CS50Z
11 Nm (1.1 m • kg)
5 Nm (0.5 m • kg)
20 Nm (2.0 m • kg)
14 Nm (1.4 m • kg)
16 Nm (1.6 m • kg)