The Yamaha YFM300 Grizzly Automatic uses HS1 bulb size for both high beam and low beam headlight applications. The replacement chart covers 2012 to 2013 vehicle 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 bulb is the sole bulb type specified for the Yamaha YFM300 Grizzly Automatic, covering both the high beam and low beam headlight positions across the 2012-2013 model years.
The HS1 is a dual-filament halogen bulb, meaning a single bulb unit 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 wattage rating of 35W/35W, where the first value corresponds to the high beam filament and the second to the low beam filament, both drawing equal power.
The HS1 uses a PX43t base, which is a bayonet-style mount with a specific pin configuration designed for motorcycle and powersport applications. This base type is not interchangeable with common automotive bulb bases such as H4, despite the H4 sharing a similar dual-filament halogen design.
The HS1 is governed by ECE (Economic Commission for Europe) standards, a regulatory framework recognized across Europe and numerous other markets worldwide, which defines the bulb's photometric and dimensional requirements.
Because the high beam and low beam positions share the same HS1 specification for both the 2012 and 2013 model years, a single replacement bulb type services both headlight functions on the vehicle.