It had a single-cylinder overhead camshaft (OHC) engine with a 9500 rpm redline.

The newer model sported a two piece head, 124 cc (7.6 cu in) displacement, and a larger carburettor.

[1][2] Aside from different color schemes and minor lettering differences, these are some of the major design changes: Identifications, specifications, and changes throughout the years.

The components of the CB125 did not change much throughout the years unlike the appearance of the CB125.

The color and Decals changed every year the Cb125 was produced.