Motorcycle Transmission Gearbox 50cc 70cc 90cc 110cc Main Secondary Shafts for ATV Pit Bike Go Kart Quad Moto Engine Accessories This transmission gearbox is designed for use with 50cc to 110cc engine applications in ATVs, pit bikes, go karts, and similar small motorcycles.It includes both main and secondary shafts, essential components for the drivetrain system.The unit supports standard gear engagement and power transfer functions required for in recreational and vehicles.Compatible with a range of small-displacement engines, it serves as a functional replacement or upgrade part for transmission assemblies.Disclaimer: This is not an part.References to brands or models are used only to illustrate compatibility.