Valve Clearance/Decompressor System; Valve Clearance Inspection - Honda CRF450X 2005 Service Manual

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VALVE CLEARANCE/OECOMPRESSOR
SYSTEM
Inspec t and adjusr
the valve clearance
while the engine is
cold
(below 35"C/
95~)
VALVE CLEARANCE INSPECTION
Remove
the cvlinder head
cover (page 9·7) .
Remove th e crankshaft hole cap and O-ring .
MAINTENANCE
Turn the crankshaft clockwise t o align the punch
~
....... : :':: ....
-==----=-~~=--.:::::~~-,
mark with the index mark on the right crankcase
cover.
Make sure the piston is at TOC (Top Dead Center) on
the compression stroke.
This position can be obtained by confirming that
there is slack in the rocker arms. If there is no slack,
rotat e the crankshaft clockwise one full turn and
align the punch mark on the primary drive gea r with
the index mark on the right crankcase cove r again.
Check that the index line on the cam sprocket al igns
with the "/:::,." mark on the camshaft holder.
Intake side:
Insen a feele r gauge between the valve liher and
cam lobe.
Record the
Check the lIallle clearance for the intake valves
clearBnce for eBch
using a feeler gauge.
vailifl for
(eference
m
sturn selectiOn if
VALVE CLEARANCE:
IN : 0.16 ± 0.03 mm (0.006 ± 0.001 in)
ad,ustment
IS
required.
PUNCH MAR K
4-15