MAINTENANCE AND ADJUSTMENT
102
Drive Chain Free Movement
Inspection
WARNING
Make sure the motorcycle is stabilized
and adequately supported.
Do not support the motorcycle on
any ancillary component, the exhaust
system or any other non structural
parts of the motorcycle frame.
A correctly supported motorcycle will
help prevent it from falling.
An unstable motorcycle may fall
resulting in motorcycle damage,
serious injury or death.
1
1. Maximum movement position
(Scrambler 400 X shown)
▼ Position the motorcycle on level
ground and in an upright position
with no weight on it.
▼ Rotate the rear wheel by pushing
the motorcycle to find the position
where the drive chain is tightest,
and measure the vertical movement
of the chain midway between the
sprockets.
▼ The vertical movement of the drive
chain must be in the range of for
Speed 400 and for Scrambler 400 X.
▼ If the measurement exceeds the
range, then the drive chain needs to
be adjusted, see page 102.
Drive Chain Free Movement
Adjustment
If the drive chain free movement is
incorrect, adjustments must be made as
follows:
▼ Loosen the rear wheel spindle nut.
▼ Loosen the lock nuts on both the
left hand and right hand chain
adjuster bolts.
▼ Moving both adjusters by an
equal amount, using the adjuster
markings as a guideline, turn the
adjuster bolts clockwise to increase
drive chain free movement and
counterclockwise to reduce drive
chain free movement.
▼ When the drive chain free
movement has been set to for
Speed 400 and for Scrambler 400 X,
see page 102, push the wheel into
firm contact with the adjusters.
▼ Make sure the same adjuster
marking is aligned with the spindle
adjuster on both sides of the
swinging arm.
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