The Hyosung GT650R uses an H1 bulb size for high beam headlight and an H3 bulb size for low beam headlight applications. The replacement chart covers 2010 through 2017 model 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 Hyosung GT650R uses the H1 bulb for high beam headlights across all listed model years, spanning 2010-2017.
The low beam headlight position across the same 2010-2017 range is filled by the H3 bulb, a different type from the high beam despite sharing the same wattage and voltage rating.
Both the H1 and H3 are single-filament halogen bulbs operating at 12V and 55W, meaning neither type supports dual-function operation from a single bulb.
The H1 uses a P14.5s base, while the H3 uses a PK22s base. These two base types are physically incompatible with each other, so the bulbs are not interchangeable between the high and low beam positions.
Both bulb types conform to ECE standards, with approval also extended to the US and Japanese markets, indicating broad regulatory acceptance across major automotive regions.
The ECE designation on both bulbs reflects a standardized specification governed by the United Nations Economic Commission for Europe, which defines performance and construction requirements for vehicle lighting components.