Yamaha CS50 Service Manual page 103

ENGINE ASSEMBLY AND ADJUSTMENT
• Check that the manufacturers symbols or
numbers printed on the rings are on the
upper side.
3. Intall:
• cylinder
NOTE:
Install the cylinder with one hand while com-
pressing the piston rings with the other.
• coolant pipe (CS50Z only)
4. Install:
• cylinder head gasket (new gasket)
5. Install:
• thermostat (CS50Z only) on cylinder head
• cylinder head
• spark plug
• air covers (CS50 only)
NOTE:
• The arrow
should point to the exhaust side.
• Tighten the cylinder head positioning nuts
in several steps, using a cris-cross pattern.
• right crankcase cover (CS50Z only)
Cylinder head positioning nuts
14 Nm (1.4 m • kg)
Spark plug
20 Nm (2.0 m • kg)
Thermo switch (CS50Z only)
16 Nm (1.6 m • kg)
4-40
ENG
5 Nm (0.5 m • kg)
"EX" from the cylinder head