The ATK GT650R headlight bulb uses a 9003 size for both high and low beam functions. The replacement chart covers 2011 to 2014 production years with corresponding bulb size specifications.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The 9003 bulb is the sole headlight bulb type specified for the ATK GT650R across the 2011-2014 model years, appearing in both the high beam and low beam positions.
The 9003 is a dual-filament halogen bulb, meaning a single bulb contains two separate filaments: one rated at 60 watts for high beam output and one rated at 55 watts for low beam output.
The 9003 bulb operates on a 12-volt electrical system, which is standard for motorcycle applications.
The 9003 uses a P43t base, a bayonet-style mount with a 43mm flange that physically locks the bulb into the headlight housing.
The 9003 is defined under ANSI standards and is recognized across the United States and Canada under that designation.
Because the GT650R uses the same 9003 bulb for both the high beam and low beam headlight positions, a single bulb type serves the entire headlight assembly rather than requiring two separate bulb sizes.
The 9003 designation is functionally equivalent to the H4 bulb used under European ECE standards, though the two designations reflect different regulatory frameworks and may carry minor specification differences that affect direct interchangeability.