OWNER’S MANUAL & COMPETITION HANDBOOK - Page 69

For 2013 CRF450X.

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68 Servicing Your Honda
Valve Clearance
Camshaft Holder Assembly Removal
1. Record the intake valve and exhaust valve
clearances.
Make sure the piston is at TDC (Top Dead
Center) on the compression stroke (page 66).
2. Remove the cam chain tensioner lifter cover
bolt (1) and sealing washer (2).
(2)
(1)
(1) cam chain tensioner lifter cover bolt
(2) sealing washer
Use the tensioner stopper tool.
Tensioner stopper 07AMG-001A100
3. Turn the tensioner shaft clockwise with the
tensioner stopper (3) until it stops, in order to
retract the tensioner fully.
Then insert the tensioner stopper fully to hold
the stopper in the fully retracted position.
(3)
(3) tensioner stopper
4. Loosen the cam sprocket bolt (4).
Rotate the primary drive gear bolt
(crankshaft) clockwise one turn and remove
the other sprocket bolt. Rotate the primary
drive gear bolt (crankshaft) clockwise one
turn again and remove the remaining sprocket
bolt.
5. Remove the cam sprocket (5) and then
attach a piece of wire to the cam chain (6) to
prevent it from falling into the crankcase.
NOTICE
Do not let the bolts, sprocket and cam chain fall
into the crankcase.
(6)
(5)
(4)
(4) cam sprocket bolts
(5) cam sprocket
(6) cam chain
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