Camshaft Installation - Honda CRF250R Owner's Manual

Valve Clearance

Camshaft Installation

1. Install the newly selected shims (1) on the
valve spring retainers (2).
NOTICE
Do not let the shims fall into the crankcase.
(1)
(2)
(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
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Servicing Your Honda
3. Install the valve lifters (3) in their original
locations into the cylinder head (4).
(4) (3)
(3) valve lifters
(4) cylinder head
4. Make sure the piston is at TDC (page 67).
5. Place the camshaft (5) with the intake cam
lobes (6) facing up and align the timing marks
(7) on the cam sprocket (8) with the surface of
the cylinder head (9).
Install the cam chain (10) over the sprocket
without rotating the camshaft.
(10) (5)
(6)
(5) camshaft (10) cam chain
(6) intake cam lobes
(7) (8)
(9)
(7) timing marks
(8) cam sprocket
(9) surface of the cylinder head