The CFMOTO CFORCE 400 high beam and low beam headlight bulbs both utilize the HS1 size. The replacement chart covers 2016 through 2018 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 sole bulb type across all headlight positions in the CFMOTO CFORCE 400 specifications, covering both high beam and low beam functions for the 2016-2018 model years.
The HS1 is a dual-filament halogen bulb, meaning a single physical unit contains separate filaments for both high and low beam operation, each rated at 35W on a 12V system.
The HS1 uses a PX43t base, a three-pin bayonet-style mount originally developed for motorcycle applications, which positions and locks the bulb at a fixed rotational angle to maintain correct filament alignment within the reflector housing.
The HS1 is governed by ECE regulations, a lighting standard recognized across Europe and numerous other markets worldwide, which defines output, beam pattern, and construction requirements.
Because the high beam and low beam positions share the same HS1 specification across all listed years, a single replacement bulb type serves both headlight functions in the CFMOTO CFORCE 400 (2016-2018).
The PX43t base is specific to the HS1 and is not shared with common automotive halogen types such as H4, despite the H4 also being a dual-filament bulb. The two are not interchangeable due to differing base designs and filament positions.