The Kawasaki KLX450R uses an HS1 bulb size for both high beam and low beam headlight applications. The replacement chart covers 2008 to 2009 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 for the Kawasaki KLX450R, covering both the high beam and low beam headlight positions across the 2008-2009 model years.
The HS1 is a dual-filament halogen bulb, meaning a single unit contains separate filaments for both high and low beam functions within one housing.
The HS1 operates at 12 volts 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 standard for motorcycle headlight applications and is not interchangeable with common automotive bulb bases.
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.
Because the high beam and low beam positions share the same HS1 specification on the KLX450R, a single bulb type serves the entire headlight assembly rather than requiring separate bulbs for each function.