Handlebar And Steering Head Bearings; Throttle Grip - Honda CRF450R Owner's Manual

Pour a fresh recommended coolant mixture (page 24)
slowly into the radiator filler hole up to the filler neck.
Capacity: 1.18 US qt (1.12 liter, 0.99 Imp qt)
Lean your CRF slightly right and left several times to
bleed trapped air in the cooling system.
If the coolant level lowers, add coolant and repeat the
above procedure.
Install the radiator cap securely.
(1) RADIATOR CAP
Check for the following:
– compression leaks
– abnormal engine noise
– secondary air leaks
– coolant leaks

HANDLEBAR AND STEERING HEAD BEARINGS

1. Remove the handlebar pad and check the handle-
bar for bends or cracks.
2. Check that the handlebar has not moved from its
proper position (by inspecting the paint mark align-
ment). Check that the upper holders are torqued to
16 lbf ft (22 N m, 2.2 kgf m). Tighten the front bolts
first.
3. With your CRF on a box or workstand (front wheel
elevated), turn the handlebar to the right and left to
check for roughness in the steering head bearings.
Now, stand in front of your CRF and grab the fork
(at the axle), then push the fork in and out (toward
the engine) to check for play in the steering head
bearings. If any roughness or play is felt, refer to
the Honda Service Manual for replacement or ad-
justment procedures.
(1) HANDLEBAR
(2) HANDLEBAR UPPER HOLDERS

THROTTLE GRIP

Inspection
Check for smooth rotation of the throttle grip from the
fully closed to the fully open position. Check at full left
and full right steering positions. Inspect the condition
of the throttle cables from the throttle grip down to the
carburetor. If the cables are kinked, chafed or improp-
erly routed, they should be replaced or rerouted.
Check the cables for tension or stress at both full left
and full right steering positions.
WARNING
• For safe operation and positive engine response,
the throttle cables must be properly adjusted.
(1) THROTTLE GRIP
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