Yamaha YZ250F(E), Owner'S Service Manual

Page: 227 / 356

CYLINDER AND PISTON
5-34
3. Lubricate:
• Piston
• Piston rings
• Cylinder
4. Offset:
• Piston ring end gap
5. Install:
• Cylinder gasket
• Dowel pin
• Cylinder
TIP
• While compressing the piston rings with one
hand, install the cylinder with the other hand.
• Pass the timing chain and timing chain guide
(exhaust side) through the timing chain cavity.
a. Top ring end
b. Upper oil ring end
c. Oil ring end
d. Lower oil ring end
Cylinder bolt
10 Nm (1.0 m·kgf, 7.2 ft·lbf)
1
3
2
a
3
c
a
d b
c
15
15 15
New
T
R
.
.