Honda CRF450R 2009 Owner's Manual & Competition Handbook page 72

Valve Clearance
3. Measure the exhaust valve clearance by
inserting a feeler gauge (1) between the
exhaust rocker arms (3) and shims (4).
(3)
(1)
(1) feeler gauge
(3) exhaust rocker arms
(4) exhaust valve shims
Valve Clearance:
IN: 0.006 ± 0.001 in (0.16 ± 0.03 mm)
EX: 0.011 ± 0.001 in (0.28 ± 0.03 mm)
If intake valve clearance and exhaust valve
clearance need adjustment, see Camshaft
Removal (this page) and select the correct shim
for each valve.
66
Servicing Your Honda
Camshaft Removal
1. Record the intake valve and exhaust valve
clearances (page 65).
Make sure the piston is at TDC on the
compression stroke (page 64).
2. Remove the cam chain tensioner lifter cover
bolt (1) and sealing washer (2).
(4)
(1) cam chain tensioner lifter cover bolt
(2) sealing washer
(1)
(2)
3. Insert the tensioner stopper (3) into the cam
chain tensioner lifter (4).
Turn the tensioner stopper clockwise and lock
the cam chain tensioner lifter by pushing the
handle (5) to the cam chain tensioner lifter.
• Tensioner stopper
(5)
(4)
(3) tensioner stopper
(4) cam chain tensioner lifter
(5) handle
070MG-0010100
(3)