Suzuki RG 500 Gamma (1985)

The Suzuki RG 500 Gamma motorcycle was produced in 1985, featuring a two-stroke square four-cylinder engine with a rotary valve and exhaust port valves. It had a capacity of 498 cc and a compression ratio of 7.0:1. Equipped with 4 x 28mm Mikuni VM28SH Flatslide carburetors and Suzuki PEI ignition, it had a maximum power of 70 kW / 95 hp at 9000 rpm and could reach a top speed of 236.4 km/h / 146.9 mph. The bike had a wet sump lubrication system and used NGK BR9ES spark plugs. The clutch was wet and cable operated, and it had a 6-speed transmission with final drive by chain.

The chassis was a steel double cradle frame with air adjustable fork suspension, adjustable spring preload, and anti-dive valuing, while the rear suspension was a shock absorber, adjustable for spring preload. The brakes included a dual 260 mm disc on the front and a single 210 mm disc on the rear. The bike had a length of 2100 mm, width of 695 mm, and a height of 1185 mm, with a wheelbase of 1425 mm and a seat height of 770 mm. Its dry weight was 156 kg, while its wet weight was 175 kg, and it had a fuel capacity of 22 liters.

In testing, the Suzuki RG 500 Gamma had a standing 1/4 mile time of 11.2 seconds at 193.9 km/h / 120.5 mph and could brake from 100 km/h to 0 in 39.2 meters. It had an average fuel consumption of 8.7 L/100 km and could travel 11.5 km on a liter of fuel. The bike was included in a group test by Motociclismo Motosprint.

---

Technical specifications:

Make Model: Suzuki RG 500 Gamma

Year: 1985

Engine: Two stroke, square four cylinder, rotary valve with exhaust port valves

Capacity: 498 cc / 30.4 cu in

Bore x Stroke: 56 x 50.6 mm

Cooling System: Liquid cooled

Compression Ratio: 7.0:1

Lubrication: Wet sump

Induction: 4 x 28mm Mikuni VM28SH Flatslide carburetors

Ignition: Suzuki PEI

Spark Plug: NGK, BR9ES

Starting: Kick

Max Power: 70 kW / 95 hp @ 9000 rpm

Max Power Rear Tyre: 61.9 kW / 83 hp @ 10000 rpm

Max Torque: 72 Nm / 7.3 kgf-m 53.1 lb-ft @ 9000 rpm

Clutch: Wet, cable operated

Transmission: 6 Speed

Final Drive: Chain, 2.500 (40/16)

Primary Drive Ratio: 2.230 (58/26)

Gear Ratio: 1st 2.636 (29/11) / 2nd 1.750 (28/16) / 3th 1.380 (29/21) / 4th 1.173 (27/23) / 5th 1.045 (23/22) / 6th 0.956 (22/23)

Frame: Steel, double cradle frame

Front Suspension: Air adjustable fork with 38mm tubes, adjustable spring preload and anti dive valuing.

Front Wheel Travel: 130 mm / 5.2 in

Rear Suspension: Shock absorber, adjustable for spring preload

Rear Wheel Travel: 126 mm / 4.9 in

Front Brakes: 2 x 260 mm Discs, 4 piston calipers

Rear Brakes: Single 210 mm disc, 2 piston caliper

Front Tyre: 110/90 V16

Rear Tyre: 120/90 V17

Dimensions: Length 2100 mm / 82.7 in Width 695 mm / 27.4 in Height 1185 mm / 46.7 in

Wheelbase: 1425 mm / 56.1 in

Seat Height: 770 mm / 30.3 in

Ground Clearance: 120 mm / 4.7 in

Dry Weight: 156 kg / 339.5 lbs

Wet weight: 175 kg / 386 lbs

Fuel Capacity: 22 Litres / 5.8 US gal / 4.8 Imp gal

Consumption Average: 8.7 L/100 km / 11.5 km/l / 27 US mpg / 32.5 Imp mpg

Braking 60 km/h – 0: 16 m / 52.5 ft

Braking 100 km/h – 0: 39.2 m / 18.6 ft

Standing 1/4 Mile: 11.2 sec / 193.9 km/h / 120.5 mph

Top Speed: 236.4 km/h / 146.9 mph

Road Test: Motociclismo Motosprint Group Test