The Yamaha R15 headlight bulb uses an HS1 size for both high beam and low beam functions. The replacement chart covers 2009 to 2010 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 HS1 is the sole bulb type specified across all listed positions and years for the Yamaha R15, covering both high beam and low beam headlight functions in 2009-2010.
The HS1 is a dual-filament halogen bulb, meaning a single physical unit contains two separate filaments to serve both high and low beam functions within one housing.
The HS1 operates on a 12-volt electrical system and carries a 35W/35W power rating, where each wattage figure corresponds to one of the two filaments.
The HS1 uses a PX43t base, which is a specific bayonet-style fitting type standardized for motorcycle headlight applications.
The HS1 is governed by ECE standards, a regulatory framework recognized across Europe and numerous other markets worldwide, establishing uniform performance and safety requirements for the bulb.
Because the HS1 serves both beam functions simultaneously in the Yamaha R15 (2009-2010), a single bulb replacement addresses the entire headlight output of the vehicle rather than separate units for each beam.
The PX43t base is not interchangeable with common automotive bulb bases such as H4 or H7, as it is a motorcycle-specific fitting, making base compatibility a critical factor when sourcing a replacement.