The RG250 Gamma was the first mass-produced motorcycle to have a lightweight aluminum frame and racing type aerodynamic fairing.

In its five years of production the model underwent three major changes: Mk1 (1983–1984): 45-46 hp and 38 Nm torque.

Mk2 (1985): Revised front fairings, mudguard and colour scheme and a slightly shorter wheelbase (from 1385 mm to 1360 mm) Mk3 (1986–1987): Introduction of Suzuki's AEC system (Automatic Exhaust Control).

(AEC system: Same idea as the now standard power valve design, but using a 'butterfly flap' to open and close an addition chamber on the cylinder head (open @ low RPM, closed at higher).

The AEC system opens at around 7500 RPM) Mk4: (1987): There was also a very short-lived Mk4 version created for the Japanese home market, which had larger front discs, thicker tyres and larger diameter front forks.