Honda 2005 CRF450R Owner's Manual page 65

Valve Clearance
Camshaft Holder Assembly
1. Install the newly selected shims (1) on the
valve spring retainers (2).
NOTICE
Do not let the shims fall into the crankcase.
(2)
(1)
(1) shims
(2) valve spring retainers
2. Apply molybdenum disulfide oil (a mixture of
1/2 engine oil and 1/2 molybdenum disulfide
grease containing more than 3% molybdenum
disulfide additive) to the following parts.
– camshaft cam lobes
– each valve lifter outer surface
– plunger whole surface
– decompressor shaft sliding area
60
Servicing Your Honda
3. Install the plunger (3) into the camshaft (4)
with its rounded surface facing up and groove
(5) side toward the decompressor shaft (6).
Install the decompressor shaft while aligning
its tab (7) with the groove of the plunger
shown.
Check the operation of the plunger by turning
the decompressor shaft with your finger, then
pushing down and pull up the plunger smoothly.
(5)
(4)
(2)
(3) plunger
(4) camshaft
(5) groove
4. Install the each valve lifter (8) in their original
location into the camshaft holder assembly (9).
(9)
(8) valve lifters
(9) camshaft holder assembly
5. Install the camshaft holder assembly (9) onto
(3)
Align
Do not let the decompressor shaft and pluger fall
into the crankcase.
(7)
Tighten the camshaft holder assembly bolts in a
criss-cross pattern in two or three steps.
(6)
(6)
(6) decompressor shaft
(7) tab
Exhaust side
(8)
(10) intake cam lobes
(11) camshaft holder assembly bolts
the cylinder head with the intake cam lobes
(10) facing up as illustrated below.
Apply engine oil to the camshaft holder
assembly bolt threads and seating surface.
Tighen the camshaft holder assembly bolts
(11) to the specified torque:
10 lbf·ft (14 N·m, 1.4 kgf·m)
NOTICE
(11)
(9) camshaft holder assembly
(9)
(10)