Yamaha SR250G Service Manual page 41

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CAUTION:
The crankshaft cil seal (right side) an
the erankease caver right. should be in-
stalled in @ way reverse
to the normal
direction as shown.
1 Gia?
Gimucaccmer
0, Gowan
Crankease
1. Thoroughly wash the case halves in
mild solvent
2. Clean all qaskot mating surfaces and
crankcase mating s.rface thoroughly
3, Visually inspect case halves for any
cracks, road damage, etc
4. Check all fittings not previcusly
moved for signs of loosening or damage
§, Hf bearings have heen removed, check
their seats for signs of damage (such
as the bearng spinning in the seat, etc)
6 Check oil delivery passages for signs of
blockage
7. If beerings have not been removed, oil
them thoroughly immed ately a
shinng anc drying. Rotete the b
checking
for roughness
indicating
damaged races
or balls.
8. Check needle bearina(s) in transmission
for damagee Replace as aquired
ENGINE ASSEM
ADJUSTMENT
ING AND
Crankshaft Installation
After ail Bearings anc seals have been in-
stalled in 20th crankcase halves: install
crankshaft as follaws:
1. Place the left crankcese undersid=
2. Fit the crankshaft onta the left case half
by tapping the crankpin area with a soft
head hammer while turning the crank-
shatt Work slowly and corefully, Make
sure the cranks7a't ie set evenly.
NOTE:
=
Pay attention 10 the parallelism bezween the
crankweb and the crankcase surface.
or
aS
a e
3.
Install the drive axle anid main
axte.
NOTE.
While installing tho drive axle into the
srankoase, pay careful attention to the ail
sual lip,
It is recommended to bet a suitable "O-ring"
into the drive axis groove.

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