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| Manufacturer | Suzuki |
|---|---|
| Production | 1985–1987 |
| Class | Sport bike |
| Engine | 498.5 cc (30.42 cu in) two-stroke, four-cylinder U engine, liquid-cooled |
| Bore / stroke | 56 mm × 50.6 mm (2.20 in × 1.99 in) |
| Compression ratio | 7.0:1 |
| Ignition type | CDI |
| Transmission | Cassette-type 6-speed constant mesh manual, chain final drive |
| Frame type | Box-section aluminum, double cradle |
| Suspension | Front: 38 mm telescopic fork with hydraulic anti-dive Rear: full-floater swing arm |
| Brakes | Front: dual 260 mm discs with four-piston calipers Rear: 210 mm disc with twin-piston caliper |
| Tires | Front: 110/90-16 rear: 120/90-17 |
| Wheelbase | 1,425 mm (56.1 in) |
| Dimensions | L: 2,100 mm (83 in) W: 695 mm (27.4 in) H: 1,185 mm (46.7 in) |
| Seat height | 770 mm (30 in) |
| Fuel capacity | 22 L (4.8 imp gal; 5.8 US gal) |
The Suzuki RG500 "Gamma", a sport bike with a two-stroke engine, was produced by Suzuki for just two years between 1985 and 1987.
The RG "Gamma" 500 was directly based on the series of Suzuki RG Γ 500 Grand Prix motorcycles with almost identical features to the official two-stroke machines used by Italian world champion Franco Uncini during the 1984 season with the Gallina team. The RG Γ 500 won two consecutive Riders' Championships in the 500 cc class with Marco Lucchinelli in 1981 and Franco Uncini in 1982. Like its GP forebears, the road-going RG was powered by a naturally aspirated, rotary-valve inducted, twin crank square four two-stroke engine displacing some 498 cc. This engine employed thermostatically controlled liquid-cooling by means of a front-mounted radiator.
Suzuki used an aluminum box-section frame with castings for the headstock and rear swing arm. The front suspension had pre-load adjust, as well as an anti-dive system called Posi Damp. This was a popular feature on early 1980s sports bikes and was supposed to control the tendency of a motorcycle's nose to dive under braking. At the rear, the full-floater suspension design used dual swing arms.