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 |
