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Yamaha XT250X - Page 175

Yamaha XT250X
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CYLINDER AND PISTON
5-29
● Make sure the arrow mark “a” on the piston
points towards the exhaust side of the cylinder.
● Before installing the piston pin clip, cover the
crankcase opening with a clean rag to prevent
the clip from falling into the crankcase.
3. Lubricate:
● Piston
● Piston rings
●
Cylinder
(with the recommended lubricant)
4. Offset:
● Piston ring end gaps
5. Install:
● Cylinder
NOTE:
● 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.
Recommended lubricant
Engine oil
a. Top ring
b. Upper oil ring rail
c. Oil ring expander
d. Lower oil ring rail
e. 2nd ring
f. 20 mm (0.79 in)
Cylinder bolt
10 Nm (1.0 m•kg, 7.2 ft•lb)
T
R
.
.

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