Refer to Table 1. Always use a good quality unleaded gasoline. Octane ratings are usually found on the pump.
WARNING
Avoid spills. Slowly open fuel 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. (00028b)
WARNING
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.
Table 1. Octane Ratings: 2007 Sportster Models
VEHICLE
PUMP OCTANE
(R + M)/2
All Models
91 (95 RON)