Suzuki RG500

{{No footnotes|date=June 2012}}

{{about|the road-going production motorcycle|the racing motorcycles|Suzuki RG 500|and|Suzuki RG 500 gamma}}

{{Infobox motorcycle

|name = Suzuki RG500

|image = File:RG 500 Gamma.JPG

|caption =

|aka =

|manufacturer = Suzuki

|parent_company =

|production = 1985–1987

|assembly =

|predecessor =

|successor =

|class = Sport bike

|engine = {{convert|498.5|cc|abbr=on}} two-stroke, four-cylinder U engine, liquid-cooled

|bore_stroke = {{convert|56|×|50.6|mm|abbr=on}}

|compression = 7.0:1

|top_speed =

|power =

|torque =

|ignition = CDI

|transmission = Cassette-type 6-speed constant mesh manual, chain final drive

|frame = 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

|rake_trail =

|wheelbase = {{convert|1425|mm|abbr=on}}

|length = {{convert|2100|mm|abbr=on}}

|width = {{convert|695|mm|abbr=on}}

|height = {{convert|1185|mm|abbr=on}}

|seat_height = {{convert|770|mm|abbr=on}}

|dry_weight =

|wet_weight =

|fuel_capacity = {{convert|22|L|abbr=on}}

|oil_capacity =

|fuel_consumption =

|turning_radius =

|climbing_ability =

|related =

|sp =

}}

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 498 cc naturally aspirated, rotary-valve inducted, twin crank square four two-stroke engine. 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.