Gearbox with Sprocket Shaft | Compact Metal Housing, Gearbox Assembly, for Engine Rebuild

Upgrade or repair your small trail motorcycle with this premium gearbox assembly, engineered specifically for 40-5 and 40-6 engine applications. This essential transmission component is designed to reclaim smooth power delivery and reliable performance, making it an ideal choice for rebuilds, routine maintenance, or custom garage projects. Crafted with a compact gray metal housing, this unit features a pre-mounted sprocket shaft, a round cover plate, and sturdy hex fasteners that ensure construction stability under demanding riding conditions. The built-in mounting holes offer a straightforward alignment process, allowing you to secure this motorcycle gearbox to your engine setup with confidence. Weighing compatible solid 0.84 kg, this reinforced metal components piece provides the balance of durability and weight, ensuring your vehicle remains responsive courses and trails.