Honda 2009 CRF450X Owner's Manual & Competition Handbook page 79

11.Check the operation of the plunger (3) by
pushing the decompressor weight (20) with
your finger and then pushing the plunger
down. Release the decompressor weight and
pull up the plunger.
(20)
(3)
(3) plunger
(20) decompressor weight
12.Remove the tensioner stopper (26) from the
cam chain tensioner lifter.
(26) tensioner stopper
13.Rotate the primary drive gear bolt (crankshaft)
clockwise two turns and align the punch mark
(13) with the index mark (14). Make sure that
the timing mark (17) on the sprocket align
with the " " mark (18) on the camshaft
holder assembly.
If the timing mark doesn't align with the "
mark, remove the cam sprocket.
Then realign the valve timing.
(14)
(13)
(13) punch mark
(14) index mark
(17) timing mark
(18) " " mark
(26)
14.Measure the intake valve and exhaust valve
clearances by inserting a feeler gauge (27).
Valve Clearance:
IN: 0.16 ± 0.03 mm (0.006 ± 0.001 in)
EX: 0.28 ± 0.03 mm (0.011 ± 0.001 in)
"
(27)
(17)
(27) feeler gauge
(18) 15.Install a new sealing washer (28) and tighten
the cam chain tensioner lifter cover bolt (29).
(28)
(28) sealing washer
(29) cam chain tensioner lifter cover bolt
HONDA O/M CRF450X (Eu) 3RMEY620 00X3R-MEY-6200
Valve Clearance
(27)
(29)
73
Servicing Your Honda