Drive Chain; Drive Chain Slack Inspection; Drive Chain Adjustment; Drive Chain Cleaning And Lubrication - Honda CRF450X 2005 Service Manual

MAINTENANCE
DRIVE CHAIN
Never inspect and
adjust the drive
chain while the
engine
is
running.
4-24
DRIVE CHAIN SLACK INSPECTION
Raise the rear w heel off the ground by placing a
workstand under the engine.
Measure the chain slack, on the upper chain run,
midway between the sprockets.
CHAIN SLACK: 25 - 35 mm (1 .0 - 1.4 in)
I
NOTICE
I
Excessive chain slack, 60 mm
(2.4
in)
Of
more, may
damage the frame.
ADJUSTMENT
If the chain needs adjustment, loosen the axle nut
I"'..,,...r:;:;;:~';.';::;;:;"
and adjuster lock nuts, and turn the adjusters.
Check that the index marks are in the same position
on each side, then tig hten the axle nut to the speci-
fied torque.
TORQUE: 128 N 'm (13.1 kgf·m, 94lbf.ft)
After torquing the axle nut, seat the adjusters
snugly against the adjusting blocks and tighten the
adjuster lock nuts to the specified torque.
TOROUE: 27 N'm (2.8 kgf·m, 20 Ibl·ft)
CLEANING AND LUBRICATION
Clean the dri ve chain in non-flammable or high , - - - -- - - - - - - - - - - - -,
flash-poin t solvent and wipe it dry. SOFT BRUSH
SOLVENT
Be sure the chai n has dried completely befo re lubri-
cating.
Inspect the chain for possible wear or damage;
replace any chain that has damaged railers or loose CLEANIN G
fitting links.
Replace any chain that has damaged rollers, loose
fining links, or otherwise appea rs unserviceable. WIPE AND DRY
D
Q
DC
Installing a new chai n on badly worn sprockets will
cause the new chain to wear quickly.
Inspect and replace sprocket as necessary. LUBRICATE
:~ ~
Measure the drive chain inner plate width.
SERVICE LIMIT: 13.4 mm (0.53 in)
If the measurement exceeds the service limit,
replace the chain.
SERVICE LIMIT: 13.4 mm
(O.53
in)
o o o o
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