Fuel System - Honda CRF450X 2020 Owner's Manual & Competition Handbook

Fuel System

Fuel System

Refer to Important Safety Precautions on page 31.
Fuel
Type
Pump Octane Number 91 (or higher)
Use only unleaded fuel in your CRF. If you ride
your CRF in a country where leaded fuel might be
available, take precautions to use only unleaded
fuel.
Your engine is designed to use any unleaded
gasoline that has a pump octane number of 91 or
higher. Gasoline pumps at service stations
normally display the pump octane number.
For information on the use of oxygenated fuels, see
page 175.
Use of lower octane gasoline can cause persistent
"pinging" or "spark knock" (a louder 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
gasoline. If pinging or spark knock persists,
consult your dealer.
Never use stale or contaminated gasoline. Avoid
getting dirt, dust or water in the fuel tank.
54
Servicing Your Honda
Refueling Procedure
If mud is on the fuel fill cap (1) and fuel tank top
shelter (2) at time of refueling, remove the mud
before refueling.
Unleaded
1. To open the fuel fill cap, turn the fuel fill cap
counterclockwise and remove it.
NOTICE
Equivalent or modified parts must comply with
applicable Air Resource Board (ARB) evaporative
emission control regulations. Non-compliance
may result in civil litigation or criminal
prosecution.
The fuel cap may not be disassembled. When
replacing, consult with a dealer and replace with
a Honda genuine fuel cap or one that complies
with Air Resource Board (ARB) evaporative
emission control regulations.
(3)
(2)
(1) fuel fill cap
(2) top shelter
(1) (4)
(3) filler neck bottom
(4) breather tube
2. Add fuel until the level reaches the bottom of
the filler neck (3).
Fuel Tank Capacity: 2.01 US gal (7.6 ℓ)
• Be careful not to damage the fuel pump while
filling the fuel tank.
• Avoid overfilling the tank. There should be no
fuel in the filler neck.
WARNING
Gasoline 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.
3. After refueling, turn the fuel fill cap clockwise
until it clicks.
• If the breather tube (4) is twisted, turn the
rotary joint to correct.
• If you replace the fuel cap, use a Honda
Genuine replacement part or equivalent.