Gas Gas SM headlight bulbs utilize HS1 size for both high and low beam functions. The replacement chart covers 2005 to 2008 production years with corresponding bulb specifications.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The HS1 bulb is the sole bulb type across all listed positions and model years for the Gas Gas SM, covering both high beam and low beam headlight functions.
The HS1 is a dual-filament halogen bulb, meaning a single physical bulb contains two separate filaments, one serving the high beam function and one serving the low beam function.
The HS1 operates at 12 volts with a 35W/35W output rating, where each wattage figure corresponds to one of the two filaments.
The HS1 uses a PX43t base, which is a bayonet-style fitting specific to motorcycle headlight applications and is not interchangeable with common automotive bulb bases such as H4, despite the H4 also being a dual-filament halogen type.
The HS1 is built to the ECE standard, a regulatory framework recognized across Europe and numerous other markets worldwide, governing output, beam pattern, and construction.
The Gas Gas SM used the HS1 across the 2005, 2007, and 2008 model years, with no variation in bulb specification between high and low beam positions across those years.