Suzuki RG500

The Suzuki RG500 Gamma was a motorcycle built by Suzuki between 1985 and 1989 and inspired by the RG Gamma Grand Prix racer of the 1970s, capitalizing on Suzuki's seven consecutive wins in the 500 cc-class. The Gamma was powered by a two stroke, rotary valve, twin crank, square four engine displacing 498 cubic centimeters. Early models gave convert|93.7|bhp at 9,500 RPM. The engine employed liquid-cooling by means of a large front-mounted radiator with a thermostatic control. Suzuki employed an aluminum boxsection frame with castings for the headstock and swinging arm for the Gamma. The front suspension had pre-load adjust and an anti-dive system called "POSI DAMP" to control the tendency of a motorcycle's nose to dive under braking. At the rear the full-floater suspension design used dual-swingarms. The motorcycle weighed convert|343|lb|kg|abbr=on dry.

In Japan this bike was offered as an RG400 to take advantage of the up to 400 cc tax bracket.