5-6 2005 PDI: Sportster Models
FUEL SYSTEM 5.4
GENERAL
CAUTION
Some fuel suppliers sell gasoline which has been
blended with an alcohol or an ether. The type and amount
of alcohol or ether added to the fuel is important.
CAUTION
Do not use gasoline that contains methanol. Doing so
can result in fuel system component failure, engine dam-
age and/or equipment malfunction. (00148a)
● Gasolines containing ETHANOL (ethyl alcohol or grain
alcohol) can be used. Gasoline/ethanol blends are a mix-
ture of 10% ethanol and 90% unleaded gasoline. They
are identified as “gasohol,” “ethanol enhanced,” or “con-
tains ethanol.”
● Gasolines containing METHYL TERTIARY BUTYL
ETHER (MTBE) can also be used. Gasoline/MTBE
blends are a mixture of gasoline and as much as 15%
MTBE.
● REFORMULATED OR OXYGENATED GASOLINES
(RFG): “Reformulated gasoline” is a term used to
describe gasoline blends that are specifically designed to
burn cleaner than other types of gasoline, leaving fewer
“tailpipe” emissions. They are also formulated to evapo-
rate less when you are filling your tank. Reformulated
gasolines use additives to “oxygenate” the gas. Your
motorcycle will run normally using this type of gas and
Harley-Davidson recommends you use it when possible,
as an aid to cleaner air in our environment
Because of their different chemical properties (which affect
fuel volatility and ignition characteristics), these blends may
adversely affect the starting, drivability, and fuel efficiency of
the motorcycle. If you experience these problems, Harley-
Davidson recommends using straight, unleaded gasoline.
CAUTION
Use only unleaded fuel in California model catalytic con-
verter-equipped motorcycles. Using leaded fuel will dam-
age the emission control system. (00150a).
FUEL TANK
Partially fill fuel tank with gasoline. Follow FUEL recommen-
dations found in the Owner’s Manual. Use unleaded gasoline,
91 octane or higher on all 1200 Roadster and Custom mod-
els, and 87 octane or higher on 883 Standard and Custom
models.
See Figure 5-8. After adding gasoline, check for smooth oper-
ation of the fuel valve. Inspect fuel valve and fuel lines for
leaks.
Figure 5-8. Fuel Supply Valve
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