The KYMCO Mongoose 270 headlight bulb uses HS1 size for both high beam and low beam functions. The replacement chart covers 2016 to 2018 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 KYMCO Mongoose 270 uses the HS1 bulb type for both high beam and low beam headlight positions across the 2016-2018 model years.
The HS1 is a dual-filament halogen bulb, meaning a single bulb contains two separate filaments to serve both high and low beam functions within one unit.
The HS1 operates at 12 volts with a 35W/35W output rating, where each wattage figure corresponds to one of the two filaments.
The HS1 uses a PX43t base, which is a bayonet-style mount specific to this bulb type and is not interchangeable with other common automotive or motorcycle base types such as BA20d or H4.
The HS1 is governed by ECE standards, a regulatory framework recognized across Europe and numerous other markets worldwide, distinguishing it from DOT-regulated bulbs used in North American automotive applications.
Because the same HS1 bulb specification applies to both the high beam and low beam positions, a single replacement bulb type covers both headlight functions on the Mongoose 270.