Fuel; Octane Ratings; Specification - Buell XB Series Owner's Manual's

They are also formulated to evaporate 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 Buell recommends you use it when
possible, as an aid to cleaner air in our environment.

Do not use race gas or octane boosters. Use of these fuels will damage the fuel
system.
You may find that some gasoline blends adversely affect the starting, drivability or fuel
efficiency of your bike. If you experience one or more of these problems, we
recommend you try a different brand of gasoline or higher octane rating.

Fuel

Refer to Octane Ratings. Always use a good quality unleaded gasoline. Octane ratings
are usually found on the pump.
Avoid spills. Slowly remove filler cap. Do not fill above bottom of filler neck insert,
leaving air space for fuel expansion. Secure filler cap after refueling. Gasoline is
extremely flammable and highly explosive, which could result in death or serious
injury. (00028a)
Use care when refueling. Pressurized air in fuel tank can force gasoline to escape
through filler tube. Gasoline is extremely flammable and highly explosive, which
could result in death or serious injury. (00029a)
Modern service station pumps dispense a high flow of gasoline into a motorcycle fuel
tank making air entrapment and pressurization a possibility.
Pump Octane (R+M)/2
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Octane Ratings

SPECIFICATION

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RATING
91 (95 RON)