Honda CRF250R 2005, Owner'S Manual

Page: 38 / 164

34
Servicing Your Honda
Fuel System
Refer to Safety Precautions on page 19.
Fuel Recommendation
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 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 144.
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 Honda dealer.
Never use stale or contaminated gasoline. Avoid
getting dirt, dust, or water in the fuel tank.
Type Unleaded
Pump Octane Number 91 (or higher)
Refueling Procedure
Fuel Tank Capacity: 1.9 US gal (7.3 liter)
(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.
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.
Fuel Valve and Hose
(1) fuel valve (3) fuel line
(2) fuel filter
1. Check the fuel valve (1) and fuel filter (2) for
contamination.
2. Check for leaks.
3. Check the fuel line (3) for cracks,
deterioration, damage, or leakage. Replace the
fuel line, if necessary.
4. Check for interference between the frame and
tank and adjust if necessary.
(2)
(3)
(1)
(3)
(1)
(2)
(3)