Fuel System - Honda 2009 CRF450X Owner's Manual & Competition Handbook

Fuel System

Refer to Safety Precautions on page 25.
Fuel Recommendation
Type Unleaded
Research Octane Number 95 (or higher)
We recommend that you use unleaded fuel
because it produces fewer engine deposits and
extends the life of exhaust system components.
Your engine is designed to use any petrol that has
a pump octane number (R+M)/2 of 91 or higher,
or a research octane number of 95 or higher.
Petrol pumps at service stations normally display
the pump octane number. For information on the
use of Petrol Containing Alcohol, see page 165.
Use of lower octane petrol can cause persistent
"pinging" or "spark knock" (a loud rapping
noise) which, if severe, can lead to engine
damage. Light pinging experienced while
operating under a heavy load, such as climbing a
hill, is no cause for concern.
If pinging or spark knock occurs at a steady
engine speed under normal load, change brands
of petrol. If pinging or spark knock persists,
consult your Honda dealer.
Never use stale or contaminated petrol or an
oil/petrol mixture. Avoid getting dirt, dust, or
water in the fuel tank.
40
Servicing Your Honda
HONDA O/M CRF450X (Eu) 3RMEY620 00X3R-MEY-6200
Refueling Procedure
Fuel Tank Capacity: 7.2R (1.90 US gal, 1.58
Imp gal)
(3)
(2)
(1)
(1) fuel fill cap (3) steering stem nut
(2) breather tube
1. To open the fuel fill cap (1), pull the breather
tube (2) out of the steering stem nut (3).
Turn the fuel fill cap counterclockwise and
remove it.
2. Add fuel until the level reaches the bottom of
the filler neck. Avoid overfilling the tank.
There should be no fuel in the filler neck.
3. Close the fuel fill cap by turning the cap
clockwise and insert the breather tube in the
steering stem nut.
WARNING
Petrol is highly flammable and
explosive. You can be burned or
seriously injured when handling fuel.
• Stop the engine and keep heat, sparks
and flame away.
• Handle fuel only outdoors.
• Wipe up spills immediately.
Fuel Line
(1)
(1)
(1) fuel line
1. Check for leaks.
2. Check the fuel line (1) for cracks,
deterioration, damage, or leakage. Replace the
fuel line, if necessary.
3. Check for interference between the frame and
tank and adjust if necessary.