Honda CRF450R User Manual

Servicing Your Honda 55
Valve Clearance
Cylinder Head Cover Removal
Before inspection, clean the engine thoroughly to
keep dirt from entering the engine.
1. Remove the seat (page 29).
2. Remove the fuel tank (page 30).
3. Disconnect the breather tube (1) and spark
plug cap (2).
Positioning At Top Dead Center On The
Compression Stroke
1. Remove the crankshaft hole cap (1).
(1) breather tube (2) spark plug cap
4. Remove the cylinder head cover A bolt (3),
cylinder head cover B bolts (4) and cylinder
head cover (5).
(3) cylinder head cover A bolt
(4) cylinder head cover B bolts
(5) cylinder head cover
(1) crankshaft hole cap
2. Remove the spark plug (2).
(2) spark plug
(1)
(2)
(5)
(3)
(4)
(1)
(2)
(cont’d)
Refer to
Safety Precautions on page 19.
Excessive valve clearance will cause noise and
eventual engine damage. Little or no clearance
will prevent the valve from closing and cause
valve damage and power loss. Check valve
clearance when the engine is cold at the intervals
specified in the Maintenance Schedule.
The checking or adjusting of the valve clearance
should be performed while the engine is cold.
The valve clearance will change as engine
temperature rises.

Honda CRF450R Specifications

General

Brand	Honda
Model	CRF450R
Category	Motorcycle
Language	English