Yamaha XT660R(S) Automobile User Manual


 
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ENG
CYLINDER AND PISTON
5. Offset:
piston ring end gaps
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)
È
Exhaust side
e
a
ff
d
c
b
120˚
120˚ 120˚
È
6. Install:
cylinder 1
timing chain guide (exhaust)
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 cav-
ity.
7. Install:
washers
cylinder bolts
NOTE:
Lubricate the cylinder bolt threads and mut-
ing surface with engine oil.
Install the washers with their blunt surface
facing up.
1
New
8. Tighten:
cylinder bolts = 116 mm (4.57 in) 1
cylinder bolts = 109 mm (4.29 in) 2
cylinder bolts (timing chain side) 3
T
R
.
.
Cylinder bolt
1st
15 Nm (1.5 m · kg, 11 ft · lb)
2nd
50 Nm (5.0 m · kg, 36 ft · lb)
2
1
3
3
E
E
T
R
.
.
10 Nm (1.0 m · kg, 7.2 ft · lb)