Mini Motorcycle Gearbox Assembly

About this item

Product Identity: This Two Stroke mini motorcycle clutch gearbox assembly is a complete drivetrain component designed for compact Two Stroke mini motorcycle engines, combining a reduction gearbox and centrifugal clutch in one combined unit.
Core Function: gear assembly and clutch assembly delivers reliable power transfer from the engine to the rear wheel, with the centrifugal clutch automatically engaging as engine speed increases for smooth forward motion.
Construction: Built as an aluminum reduction gearbox with centrifugal clutch, the unit features a silver metal housing, three clutch shoes with dark friction faces, metal, and a central mounting bore for secure engine attachment.
Mounting Features: This mini motorcycle transmit part includes a flanged mounting base with four visible mounting holes, a 20-tooth drive sprocket, and accessible fasteners for straightforward installation and positioning for compatible engines.
Application: Engineered for repair and replacement use on 43cc, 47cc, and 49cc Two Stroke mini-motorcycle engines, the assembly revives proper drivetrain performance and supports routine maintenance work on small recreational bikes.

If you a small Two Stroke mini motorcycle and notice slipping, rough engagement, or worn drivetrain parts, this Two Stroke mini motorcycle clutch gearbox assembly offers a complete, ready-to-install solution to get your motorcycle running smoothly again. As an complete drivetrain component, it replaces both the reduction gearbox and centrifugal clutch at once, eliminating the need to source individual parts separately and simplifying your repair project. Gear assembly and clutch assembly works by transferring engine mechanical power the centrifugal clutch, which automatically engages when the engine reaches running speed and disengages at idle. This design delivers smooth, gradual takeoff and consistent mechanical power the gear reduction system, making it ideal for small recreational bikes used around the yard, on unpaved paths, or at the track. Constructed as an aluminum reduction gearbox with centrifugal clutch, the unit features a silver metal housing that resists heat and wear during extended use. Inside the clutch, three shoes with dark friction faces press against the clutch drum speed increases, while the metal retract the shoes at idle for clean disengagement. A precision-machined central mounting bore ensures the clutch aligns correctly with the engine main shaft. This mini motorcycle transmit part is designed for easy, straightforward installation thanks to its flanged mounting base with four visible mounting holes. The combined 20-tooth drive sprocket connects directly to your bike's chain, and all accessible fasteners are accessible for quick tightening or adjustment during assembly. The flange design also provides a stable, rigid connection that minimizes vibration and misalignment duringIntended specifically for repair and replacement use on 43cc, 47cc, and 49cc Two Stroke mini-motorcycle engines, this product is a practical choice for both routine maintenance and unexpected drivetrain failures. Whether you are rebuilding a used mini bike, renewing a neglected project, or simply replacing worn-out clutch and gearbox components, this unit delivers the fit and function needed to get your small Two Stroke motorcycle back on the road or trail with reliable performance.

Option: 20T Gearbox Clutch