Valve Clearance; Cylinder Head Cover Removal - Honda CRF450RX 2019 Owner's Manual & Competition Handbook

Table of Contents

Advertisement

Valve Clearance

Refer to Important Safety Precautions on page 27.
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 (pages 29, 30).
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.

Cylinder Head Cover Removal

Before inspection, clean the engine thoroughly to
keep dirt from entering the engine.
1. Remove the seat and hang the fuel tank to the
left of the frame (pages 38, 39, 41).
2. Disconnect the breather tube (1) and spark
plug cap (2).
(2)
(1)
(1) breather tube
(2) spark plug cap

Valve Clearance

3. Remove the cylinder head cover socket bolts
(3), rubber seals (4), cylinder head cover (5)
and spark plug hole packing (6).
(5)
(3)
(4)
(3) cylinder head cover socket bolts
(4) cylinder head cover rubber seals
(5) cylinder head cover
(6) spark plug hole packing
Servicing Your Honda
(6)
(3)
83

Advertisement

Table of Contents
loading

This manual is also suitable for:

Crf450r 2019

Table of Contents