The Yamaha YJ50 Vino headlight bulb uses HS1 size for both high beam and low beam functions. The replacement chart covers 2001 to 2004 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 specified type for both the high beam and low beam headlight positions across all listed model years of the Yamaha YJ50 Vino, covering the 2001-2004 range.
The HS1 is a dual-filament halogen bulb, meaning a single bulb unit contains two separate filaments, one serving the high beam function and the other serving the low beam function.
The HS1 operates on a 12-volt electrical system and carries a 35W/35W power rating, indicating that both filaments draw equal wattage rather than differing outputs between beam modes.
The HS1 uses a PX43t base, which is a bayonet-style fitting specific to motorcycle headlight applications and is not interchangeable with 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 safety requirements.
Because the Yamaha YJ50 Vino (2001-2004) uses a single HS1 bulb type for both beam functions, replacing the headlight unit involves one bulb that handles the full range of headlight output rather than separate bulbs for each beam.