Yamaha YQ50 Service Manual page 99

ENGINE ASSEMBLY AND ADJUSTEMENT
3. Install :
• Cylinder
NOTE:
Install the cylinder with one hand, while
compressing the piston rings with the other
hand.
4. Install :
• Cylinder head gaskets (new gaskets)
5. Install :
• Cylinder head
• Spark plug
• Thermostat
NOTE:
• Tighten the cylinder head holding nuts in stages,
and crisscross sequence.
• The arrow on the cylinder head must point to
the front.
Nut (cylinder head) :
14 Nm (1.4 m.kg)
Spark plug :
20 Nm (2.0 m.kg)
Thermostat :
16 Nm (1.6 m.kg)
6. Install :
• Center stand
• Axle
• Plate washer
• Clip
• Spring
7. Install :
• Rear wheel
Refer to chapter 8 "REAR WHEEL"
4-38
ENG