Installing The Cylinder Head And Cylinder - Yamaha YZ125 2009 Owner's Service Manual

INSTALLING THE CYLINDER HEAD AND
CYLINDER
1. Apply:
• Engine oil
To piston "1", piston ring "2" and cylinder
surface.
2. Install:
• Cylinder "1"
Make sure the piston ring is properly posi-
tioned. Install the cylinder with one hand
while compressing the piston ring with the
other hand.
After installing, check the smooth movement of
the piston.
3. Install:
• Nut (cylinder) "1"
Nut (cylinder):
30 Nm (3.0 m•kg, 22 ft•lb)
Tighten the nuts in stage, using a crisscross
pattern.
CYLINDER HEAD, CYLINDER AND PISTON
4. Install:
• Collar "1"
• Push rod "2"
• Plain washer "3"
• Bolt (push rod) "4"
• Set the collar "5" included in owner's tool kit to
install the bolt (push rod).
• Do not forget to remove the collar.
4-26
Bolt (push rod):
5 Nm (0.5 m•kg, 3.6 ft•lb)