Suzuki Motorcycle LT-A400F KingQuad AS/ASi headlight bulbs utilize HS1 size for both high beam and low beam functions. The replacement chart covers 2008 through 2019 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 Suzuki Motorcycle LT-A400F KingQuad AS/ASi uses the HS1 bulb type for both high beam and low beam headlight positions across the 2008-2019 model years.
The HS1 is a dual-filament halogen bulb, meaning a single bulb unit contains separate filaments for both the high beam and low beam functions rather than requiring two individual bulbs.
The HS1 operates at 12 volts with a 35W/35W power rating, where each wattage figure corresponds to one of the two filaments, both drawing equal power.
The HS1 bulb uses a PX43t base, a bayonet-style fitting specific to motorcycle headlight applications, which is not interchangeable with common automotive base types such as H4 despite the H4 also being a dual-filament halogen bulb.
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 SAE-regulated bulbs used in North American automotive applications.
Because the same HS1 specification applies to both beam positions across all listed model years, a single bulb replacement part serves the full 2008-2019 production range without variation between high and low beam sockets.