Yamaha SZR 660 Service Manual page 163

DRIVE CHAIN, SPROCKET AND CROWN WHEEL
INSPECTION
1
.
Measure:
*
Length
of
10
links (drive chain)
Out
of specification -» Replace
drive
chain
Maximum
lenght of 10 links
(a):
150.0
mm
NOTE:
Stretch the chain by
hand
to
measure
it.
The
length of the
10
links
is
recorded
between
the inside
of
the
link pins
(1
)
and
(11
)
as shown.
The
length
of the
to
links
is
measured
at various
points.
2. Clean:
•
Drive chain
Immerge
in
kerosene and brush
thoroughly
to
remove as much
dirt
as possible.
Remove
from kerosene and
allow
to dry.
CAUTION:
This motorcycle
is
fitted with
a
chain with small
O-rings
(1) fitted
between
its
plates.
Vapour
cleaning, pressurised
washing and
certain
types
of
solvents
may damage
these seal rings.
To
clean the transmission chain use only
kerosene.
3.
Inspect:
•
Seal rings
(1)
(drive chain}
Damaged
-» Replace
drive chain.
•
Rollers
(2)
• Lateral plates
(3)
Damage/Wear
-* Replace
drive chain
DRIVE CHAIN,
SPROCKET AND
CROWN WHEEL
4.
Inspect:
• Chain
joint
Damage/Wear/Distortion
of
lock spring
->
Replace
joint
assembly.
5.
Lubricate:
•
Drive
chain
V^_
Lubricant
for
drive chain;
\T
Engine
oil
SAE 30W
- 50
6.
Inspect
•
Drive chain
• Rigid
-»
Clean
and
lubricate,
replace
if
necessary.
7.
Inspect;
•
Sprocket gear
Crown
wheel
• Wear
over 1/4 tooth
(1
)
Teeth
bent -» Replace.
(2)
Undamaged
tooth profile
(3)
Roller
(4)
Sprocket
Replace.
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