Review the following safety procedures. See Safety First → Safe Operating Rules.
WARNINGDo not store motorcycle with gasoline in tank within the home or garage where open flames, pilot lights, sparks or electric motors are present. Gasoline is extremely flammable and highly explosive, which could result in death or serious injury. (00003a)
WARNINGAvoid 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)
WARNINGDo not use aftermarket fuel caps. Aftermarket fuel caps may fit improperly and leak, which could lead to death or serious injury. See a Harley-Davidson dealer for approved fuel caps. (00034a)
NOTICE
Do not spill fuel onto the motorcycle while refueling. Immediately wipe up fuel spills on your motorcycle. Fuel can cause damage to cosmetic surfaces. (00147b)
NOTICE
Use only unleaded fuel in catalytic converter-equipped motorcycles. Using leaded fuel will damage the emission control system. (00150c)
NOTE
Water cannot flow through the fuel filler cap into the tank. However, water can collect between the pop-up cap and the threaded body after extended exposure to rain or washing. Remove the fuel cap and tilt to drain water.
Removing Fuel Filler Cap
See Figure 1. Press down on cap. Rotate one-eighth turn counterclockwise until cap pops up. Continue turning counterclockwise to remove.
Installing Fuel Filler Cap
Turn fuel filler cap clockwise into fuel tank until tight. Press down on cap. Rotate one-eighth turn clockwise to secure cap in position.
See Figure 2. Do not overfill the fuel tank. Insert the pump nozzle into the filler hole. Do not fill the tank beyond the bottom of the filler neck. A warm engine, the sun or extreme temperatures can cause the fuel to expand. Fuel can spill out of the tank and damage the finish. See Safety First → Safe Operating Rules.
Figure 1. Installing/Removing Fuel Filler Cap: Flush Mount
Figure 2. Fuel Level below Filler Neck