Honda CRF450R 2009 Service Manual page 410

FRONT WHEEUSUSPENSION/STEERING
Set the fork slider on V-blocks, and measure the runout.
Tum the fork slider, and measure the runoul using a
dial indicator.
SERVICE LIMIT: 0.2 mm (0.01 in)
Do not reuse
the
Replace if the service limit is exceeded, or there are
for#(
slider if
it
is scratches or nicks thai will allow fork oil to leak past the
bent.
seals.
SLIDER BUSHING/GUIDE BUSHING/BACK-UP RING
FORK SUDER
Check the slider and guide bushings for excessive wear r- B - U -S-H -'N - G - -- -- - - - -- - -- - - - ,
or scratches.
14-50
If copper appears on the surface, replace the slider and
guide bushings.
Replace
the
back-up ring if there is distortion at the
points shown.
Remove any metal powder from the fork slider and
guide bushings with a nylon brush and fork oil.
FORK DAMPER
Check the fork damper for bends or damage.
Check the piston
rod
for bends, wear or damage.
Check the fork damper operation by pumping the piston
'00.
BACK-UP RING
FORK DAMPER