This hydraulic brake lever is designed for use with universal GY6 engine models ranging from 50cc to 250cc.It is compatible with a variety of motorcycles, ATVs, quad mopeds, and four-wheeled vehicles.The lever is intended for left-side installation and functions as part of the hydraulic braking system, acting as a pump actuator to support consistent brake response.It features standard brake line connections and integrates into existing hydraulic brake setups, making it suitable for replacement or replacement in universal fitment applications.