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Yamaha MX 1972 - Page 34

Yamaha MX 1972
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Important
Note:
If the pump runs out of oil, the pump must
be
bled
to
release arr trapped
in the pump. Remove the Phillips-head bleed screw,
twist
the throttle
to
full
open position (turns the Autolube pump to maximum
stroke),
and rotate the
plastic manual starter pump plate until only oil comes out the bleed hole
(air stops coming out with the oil). Reinstall and tighten the bleed screw.
Adjusting the Drive Chain
The drive chain should have approximately 1 ¼ in.
(30
mm)
up
and down
play at the center of the lower section with the rear wheel
on
the ground.
Since a dirty chain causes excessive sprocket wear, apply oil
at
regular
intervals.
In
addition,
wash
it
in
gasoline before oiling
at
every periodic
inspection.
Adjusting Chain Tension:
a.
b.
C.
d.
Loosen the rear brake adjusting screw.
Loosen the tension bar nuts.
Loosen
the rear axle nuts
(D.
Loosen
the chain adjusting bolt
lock nuts
®•
and
shift the wheel shaft
so that both ends of the
wheel
shaft are positioned evenly
by
utilizing
the marks
on
the swing arms.
e.
After adjusting, tighten the tension bar lock nuts
®·
and
axle nut
(D.
f.
Adjust the play of the brake pedal.
* After these adjustments, check the play of the brake pedal
and
stop-
light operation.
-32
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