Suzuki RG 500 Gamma

Suzuki
Suzuki RG 500 Gamma
Manufacturer	Suzuki
Production period	1984 to 1989
class	motorcycle
design type	Super athlete
Motor data
4 cylinder, two-stroke engine
Displacement  (cm³)	498
Power  (kW / PS )	71/97 9,500 min -1
Torque  ( N m )	71.3 at 9,000 min -1
Top speed (  km / h)	230
transmission	Foot-shifted six-speed cassette gearbox.
drive	Chain drive
Brakes	Front: double disc brake, Ø 260 mm. Rear: internally ventilated disc, Ø 210 mm
Wheelbase  (mm)	1375
Dimensions (L × W × H, mm):	2100 × 695 × 1425
Seat height (cm)	770
Empty weight  (kg)	154

The RG 500 Gamma is a motorcycle of Suzuki , which directly from racing motorcycle Suzuki RG 500 was derived.

technology

The vehicle is a so-called super sports car . The technology was adopted almost one-to-one from the racing engine of the time. The water-cooled four-cylinder two-stroke engine (square-four arrangement) with 4 plate rotary valves and cassette gear has a displacement of 498 cm³. It delivers 71 kW (97 hp) at 10,000 min ^-1 . The maximum torque is 71.3 Nm at 9500 rpm and the compression ratio 7: 1. With a 56 mm bore and 50.6 mm stroke, the engine has a piston speed of 16.87 m / s at rated speed. The power is transmitted to the rear wheel via a primary drive with gears, a multi-disc oil bath clutch, a six-speed gearbox and a chain. The chassis consists of a telescopic fork at the front and a swing arm at the rear. Two disc brakes are installed at the front and one at the rear. The RG 500 reaches a top speed of 228 km / h. The dry weight is 154 kg, the empty weight 181 kg.

particularities

To date, the RG 500 is the only 2-stroke series vehicle whose drive is derived directly from a Grand Prix engine. The rival products, the Yamaha RD 500 LC V4 (65 kW / 88 PS) and the Honda NS 400 R (53 kW / 72 PS), were inferior in terms of performance and their engine design was not directly based on that of the GP machines. The RG500 drive was therefore particularly popular with amateur drivers in the national 500cc racing classes. It was much cheaper to get than a Production Racer engine and could be tuned to significantly more power than the engines from Yamaha and Honda.

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  Suzuki RG 500 (118 PS, 275 km / h) from 1979 in the Neckarsulm two-wheel museum

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  A Barry Sheene racing machine from 1977 that became the production version for the road

Weak points

Defects occurred mainly in the gearbox. The RG 500 inherited the gearbox from the largely identical Suzuki RG 400. This was designed for the Japanese market with the 400 cubic centimeter class, which is popular because of the restrictive driving license regulations. However, the RG 500 had 72 kW / 95 PS instead of just 43 kW / 59 PS of the RG 400 and a higher maximum torque. The gearbox was too weak for that. Breaking claws often caused the motor housing to break. Suzuki responded with two transmission revisions - the second only appeared in 1993, four years after the last year of construction. Another weak point is the Pertinax coating of the rotary valve housing. It is repeatedly reported here that the Pertinax tread becomes detached, which can lead to the rotary plate valve threading into the inlet opening - and thus to engine damage.

swell

• Suzuki RG 500 Gamma from 1985 , motorcycle December 4, 2001, accessed April 10, 2017

Individual evidence

1. ↑ data sheet (French). rg500.org, November 2, 2005, accessed April 10, 2017 . 
2. ↑ MOTORRAD online: Suzuki RG 500 Gamma from 1985 - Power to the people  ( page no longer available , search in web archives )  Info: The link was automatically marked as defective. Please check the link according to the instructions and then remove this notice. , accessed January 11, 2009  

Web links

Commons : Suzuki RG500  - Collection of pictures, videos and audio files

• Website about the Suzuki RG500 (French)
• Website about the Suzuki RG500 (Dutch)