Yamaha YFM700 Grizzly FI 4x4 Auto Headlight Bulb Size
The Yamaha YFM700 Grizzly FI 4x4 Auto uses HS1 bulb size for both high beam and low beam headlight applications. The replacement chart covers 2007 through 2015 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 HS1 bulb type is specified for both the high beam and low beam headlight positions across all listed model years of the Yamaha YFM700 Grizzly FI 4x4 Auto, spanning 2007-2015.
The HS1 is a dual-filament halogen bulb, meaning a single unit contains two separate filaments that serve both the high beam and low beam functions within one housing.
The HS1 operates at 12 volts with a 35W/35W output rating, where each wattage figure corresponds to one of the two filaments, both drawing equal power.
The HS1 uses a PX43t base, which is a specific bayonet-style mount with a 43mm collar. This base type is not interchangeable with other common automotive or powersports bases such as the H4's P43t, despite the physical similarity in collar sizing.
The HS1 is governed by ECE (Economic Commission for Europe) standards, a regulatory framework recognized across Europe and numerous other markets worldwide, distinguishing it from bulbs designed solely to SAE/DOT standards used in North America.
Because the Yamaha YFM700 Grizzly FI 4x4 Auto uses the same HS1 bulb for both beam positions, a single replacement bulb type applies to the entire headlight assembly rather than requiring separate bulb types for each function.