Fuel System - Honda CRF250R 2018 Owner's Manual

Refer to Important Safety Precautions on page 23.
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 159.
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.
Refueling Procedure
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
Unleaded
it.
(3)
(4)
(1) fuel fill cap
(2) breather tube
2. Add fuel until the level reaches the bottom of
the filler neck (4).
Fuel Tank Capacity: 1.66 US gal (6.3 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.
Gasoline is highly flammable and
explosive. You can be burned or seriously
injured when handling fuel.
(2)
3. Close the fuel fill cap and insert the breather
(1)
Fuel Line Inspection
1. Hang the fuel tank to the left side of the frame
2. Remove the fuel quick connect fitting cover
(3) steering stem nut
(4) filler neck bottom
3. Check the fuel line (2) for cracks,
(1)
(1) fuel quick connect fitting cover
(2) fuel line
4. Install the fuel quick connect fitting cover.
5. Install the fuel tank (page 35).

Fuel System

WARNING
• Stop the engine and keep heat, sparks
and flame away.
• Handle fuel only outdoors.
• Wipe up spills immediately.
tube in the steering stem nut.
(page 34).
(1).
deterioration, damage or leakage. Replace the
fuel line, if necessary.
(2)
Servicing Your Honda
41