The ZB50 is a 50 cc (3.1 cu in) motorcycle produced by Honda belonging to its Z Series family of mini bikes.

The ZB50 is characterized by a perimeter twin spar frame, giving it the appearance of a miniature sportbike.

The ZB50 is a street legal motorcycle, powered by a 4-stroke 49 cc overhead cam engine.

Unlike the Z50R, the ZB50 engine features a roller bearing camshaft, an automatic cam chain tensioner, and a NGK CR6HS spark plug.

[1] The transmission is 3-speed constant mesh, with a 3-up shift pattern, it uses a wet multi-plate centrifugal clutch, with the following gear ratios: 1st 3.272, 2nd 1.823, and 3rd 1.190.