Yamaha SR250G Service Manual page 46

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3. During reassembly, coat she piston ring
greoves, pistan sci areas, and piston
pin with 4-stroke enging oil
Cylinder
1. Install the cam cnain guide to the crank
ase
2. Install the new "O-ring" and cylinder
pase gasket
3. Offset the three ring end gaps
shown
as
5, Install the cylinder holding bolt,
Cylinder Head
1. Install the cylinder head gasket and
cylinder heac
2. Tighten the eylincer nead temporarily
(fing) tightaning
to follow)
Tightening torque:
10 MM BOI nnn
oid POS
37 m-kg (26 8 fib)
B MM VO!
e s s e n
2 pes
|
2.0 m-kq (14.5 ft-ib)
|
&mmanis
The
|
0.7 m-kg (5.1 ft-lb)
Cam Shaft, Gam Shaft Driven Sprocket,
Cam Chain
1. Install the cam shaft, nearing piste and
lock washer
2, Tighten the bol: and bend the lock wa-
sher
1 Te
Perr)
2 OMling (uewer stl
me lbeaer aid
4. Install t h e cylinder with ore nand while
comprassing piston rq
hand.
with other
e
3. Install. the
igning the
mares on the sprocket
ond oylinder
head and also the marks on the crank
shaft and crankcase as showr in the
fo lawing photos.

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