2013 CRF450R User Manual

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Valve Clearance

(cont’d)

Servicing Your Honda 73

8. Make sure that the timing mark (12) on the cam

sprocket aligns with the camshaft holder

mating surface (13) of the cylinder head.

9. Make sure that the dowel pins (14) are installed

into the camshaft holder (15).

10. Install the set rings (16) on the camshaft

bearing grooves (17).

NOTICE

Do not let the set rings fall into the crankcase.

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.

12. Remove the tensioner stopper (22) from the

cam chain tensioner lifter.

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.

(12) timing mark

(13) camshaft holder mating surface

(14) dowel pins (15) camshaft holder

(13)

(12)

Align

(14)

(15)

(16) set rings

(17) camshaft bearing grooves

(18) camshaft holder (20) camshaft holder bolts (long)

(19) “ ” mark

(21) camshaft holder bolts (short)

(17)

(16)

(20)

(18)

(21)

(19)

(22) tensioner stopper