Dimension  :  6.72 "  -  Hole - 1.72 "
Weight  - 1 kg
 
Interpreting “Brake Cap (Brake Drum) Gearbox”
Brake Cap:
Likely a dust cap or cover that protects the brake drum or wheel hub, preventing dirt and moisture from entering the braking or gearbox components.
Could also refer to a brake drum cap (e.g., a rubber plug or metal cover) used in drum brake systems to seal inspection or lubrication points.
 
Brake Drum:
A cylindrical component in a drum brake system, mounted to the wheel or axle, where brake shoes press against its inner surface to slow or stop the vehicle.
In this context, it may be integrated with the gearbox or drivetrain, especially in go-karts or small vehicles where the brake drum is part of the transmission or axle assembly.
 
Gearbox:
Likely a simple transmission (e.g., single-speed or centrifugal clutch-driven) connecting the engine to the axle in the Mechanical Buffalo.
The brake drum could be mounted on the gearbox output shaft or axle, serving as both a braking and power transmission component.
 
Mechanical Buffalo Context:
The twin belt clutch suggests a centrifugal clutch (3/4" or 20mm short shaft) driving a belt system to the gearbox or axle.
The lever accelerator cable controls engine RPM, engaging the clutch to power the wheels.
The hexagon nut with stud secures the rim to the hub, which may house the brake drum.
The brake drum and cap are likely part of the rear axle or gearbox assembly, providing braking for the vehicle’s wheels.
 
Missing Specifications:
No dimensions or weight were provided for the brake cap or drum, so I’ll assume compatibility with the rim (secured by M12 x 1.25 studs) and a small engine setup (50cc–250cc).
Relevant Matches from Web Sources