Suzuki RG500

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The 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 500cc-class. The Gamma was powered by a four-cylinder two-stroke square engine displacing 500 cubic centimeters. Early models gave 93.7 brake horse power (95ps) at 9,500 RPM. The engine employed liquid-cooling by means of a large front-mounted radiator with a thermostatic control. Suzuki employed a backbone frame with aluminum boxsection tubing 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 343lbs/156kg (dry).