Inner Tube Inspection
Visually inspect the inner tube [A].
If there is any damage, replace the inner tube. Since
damage to the inner tube damages the oil seal and dust
seal, replace the oil seal and dust seal whenever the inner
tube is replaced.
If the inner tube is badly bent or creased, replace
Excessive bending, followed by subsequent
straightening, can weaken the inner tube.
Temporarily assemble the inner tube [A] and outer tube
[B], and pump them back and forth manually to check for
If you feel binding or catching, the inner and outer tubes
must be replaced.
A straightened inner or outer fork tube may fall in
use, possibly causing an accident resulting in seri-
ous injury or death. Replace a badly bent or dam-
aged inner or outer tube and inspect the other tube
carefully before reusing it.
Dust Seal Inspection
Inspect the dust seal [A] for any signs of deterioration or
Replace it if necessary.
Front Fork Spring Tension Inspection (KX450FC)
Since a spring becomes shorter as it weakens, check its
free length [A] to determine its condition.
If the spring is shorter than the service limit, it must be
Fork Spring Free Length
470 mm (18.5 in.)
461 mm (18.1 in.)