Honda CRF450X 2017 Owner's Manual & Competition Handbook page 73

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) cam chain tensioner lifter cover bolt
(2) sealing washer
68
Servicing Your Honda
17 CRF450X̲31MEY710.indb 68 17 CRF450X̲31MEY710.indb 68
Use the tensioner stopper tool.
• Tensioner stopper
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.
(1)
(3) tensioner stopper
4. Loosen the cam sprocket bolt (4).
07AMG-001A100
5. Remove the cam sprocket (5) and then
NOTICE
Do not let the bolts, sprocket and cam chain fall
into the crankcase.
(3)
(4) cam sprocket bolts
(5) cam sprocket
(6) cam chain
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.
attach a piece of wire to the cam chain (6) to
prevent it from falling into the crankcase.
(6)
(5)
(4)
2016/06/08 11:45:50 2016/06/08 11:45:50