The Yamaha YW50 Zuma uses an HS1 bulb size for both high beam and low beam headlight applications. The replacement chart covers vehicle production spanning 2002 to 2011 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 headlight bulb type specified across all listed model years of the Yamaha YW50 Zuma, covering both high beam and low beam functions.
The HS1 is a dual-filament halogen bulb, meaning a single bulb unit contains two separate filaments, one dedicated to the high beam and one to the low beam. This design is common in motorcycle headlight applications where a single housing serves both functions.
The HS1 operates at 12 volts with a 35W/35W rating, indicating that each filament draws 35 watts, with both the high beam and low beam filaments rated equally.
The HS1 uses a PX43t base, which is a specific bayonet-style mount with a 43mm collar. This base type is distinct to motorcycle-oriented HS1 bulbs and is not interchangeable with automotive H4 bulbs, which share a similar dual-filament halogen design but use a different base configuration.
The HS1 conforms to ECE (Economic Commission for Europe) standards, reflecting its design for international and worldwide regulatory compliance rather than SAE (Society of Automotive Engineers) standards used in North America.
The Yamaha YW50 Zuma (2002-2005 and 2008-2011) uses the HS1 for both the high beam and low beam headlight positions across all specified years, indicating no positional variation in bulb type between the two functions.