Honda CRF450X 2020, Owner'S Manual & Competition Handbook

Page: 95 / 204

Valve Clearance
(cont’d)
Servicing Your Honda
87
7. Make sure that the timing mark (11) on the cam
sprocket aligns with the camshaft holder
mating surface (12) of the cylinder head.
8. Make sure that the dowel pins (13) are installed
into the camshaft holder (14).
9. Install the set rings (15) on the camshaft
bearing grooves (16).
NOTICE
Do not let the set rings fall into the crankcase.
10. Apply engine oil to the camshaft holder bolt
threads.
Install the camshaft holder (17) with the “ ”
mark (18) facing forward.
Install the camshaft holder bolts (19) (20) and
tighten the camshaft holder bolts to the
specified torque:
11 lbf·ft (15 N·m, 1.5 kgf·m)
Tighten the camshaft holder bolts in a crisscross
pattern in two or three steps.
11. Remove the tensioner stopper (21) from the
cam chain tensioner lifter.
12. Make sure that the piston is at TDC on the
compression stroke (page 82).
Check that the timing mark (11) on the cam
sprocket aligns with the camshaft holder
mating surface (12) of the cylinder head.
If the timing mark doesn’t align with the camshaft
holder mating surface, insert the tensioner stopper
into the cam chain tensioner lifter (page 84) and
then remove the cam chain and realign the timing
mark.
(11) timing mark
(12) camshaft holder mating surface
(13) dowel pins (14) camshaft holder
(11)
Align
(12)
(13)
(14)
(15) set rings
(16) camshaft bearing grooves
(17) camshaft holder (19) camshaft holder bolts (long)
(18) “ ” mark
(20) camshaft holder bolts (short)
(15)
(16)
(20)
(19)
(18)
(17)
(21) tensioner stopper
(11) timing mark
(12) camshaft holder mating surface
(21)
Align
Align
(11)
(12)
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