Honda CRF450R Owner's Manual page 80

8. Make sure that the timing mark (12) on the cam
sprocket aligns with the camshaft holder
mating surface (13) of the cylinder head.
Align
(13)
(12)
(12) timing mark
(13) camshaft holder mating surface
9. Make sure that the dowel pins (14) are installed
into the camshaft holder (15).
(14)
(15)
(14) dowel pins (15) camshaft holder
10. Install the set rings (16) on the camshaft
bearing grooves (17).
NOTICE
Do not let the set rings fall into the crankcase.
(16)
(17)
(16) set rings
(17) camshaft bearing grooves
11. Apply engine oil to the camshaft holder bolt
threads.
Install the camshaft holder (18) with the "
mark (19) facing forward.
Tighten the camshaft holder bolts (20) (21) to
the specified torque:
10 lbf·ft (14 N·m, 1.4 kgf·m)
Tighten the camshaft holder bolts in a criss-cross
pattern in two or three steps.
(20)
(18)
(19) (21)
(18) camshaft holder (20) camshaft holder bolts (long)
(19) " " mark (21) camshaft holder bolts (short)
Valve Clearance
12. Remove the tensioner stopper (22) from the
cam chain tensioner lifter.
(22) tensioner stopper
13. Make sure that the piston is at TDC on the
"
compression stroke (page 67).
Check that the timing mark (12) on the cam
sprocket aligns with the camshaft holder
mating surface (13) of the cylinder head.
If the timing mark doesn't align with the camshaft
holder mating surface, remove the cam chain and
realign the timing mark.
Align
(13)
(12)
(12) timing mark
(13) camshaft holder mating surface
Servicing Your Honda
(22)
(cont'd)
73