Suzuki DR Big 750 S.

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Suzuki
DR Big 750 S.
Manufacturer Suzuki
Sales description DR Big 750 S.
Production period 1988 to 1990
class motorcycle
design type Travel enduro
Motor data
air / oil-cooled single cylinder engine
Displacement  (cm³) 727
Power  (kW / PS ) 37/50 at 6,800 min -1
Torque  ( N m ) 55 at 5500 min -1
Top speed (  km / h) 160
transmission 5 courses
drive O-ring chain
Wheelbase  (mm) 1,510
Dimensions (L × W × H, mm): 2,255 × 945 × 1,295
Seat height (cm) 89
Empty weight  (kg) 205
successor Suzuki DR 800 S.

The Suzuki DR Big 750 S was a motorcycle model from the Japanese manufacturer Suzuki . It was presented at the Paris Motor Show in 1987 and delivered from 1988. At that time it was the single-cylinder motorcycle with the largest displacement in series production. The additional "beak" rigidly mounted on the fuel tank caused a sensation when it was presented in 1987. The model was manufactured until 1990 under the model code SR41B.

history

Developments began in 1985 when Suzuki decided to manufacture the largest-capacity series enduro. The engine was designed by Hiroshi Moritaki . Tests were first made with an oval piston engine with six valves per cylinder and 680 cm³; however, this solution was discarded again. With the appearance of the Kawasaki KLR 650 in 1986, the target displacement was increased to 730 cm³ in order to create a certain distance to the competitor. The list price at the start of sales was DM 8,990. The sales figures fell short of expectations.

construction

The air / oil-cooled four - stroke engine generates a nominal output of 37 kW (50 HP) and a maximum torque of 55 Nm at a speed of 5,500 min −1 from a displacement of 727 cm³ . The cylinder has a bore of 105 mm diameter, the piston has a stroke of 84 mm with a compression ratio of 9.5: 1.

In order to dampen the vibrations , the air-oil-cooled four-valve engine equipped with CDI double ignition has two balance shafts . The mixture is supplied by two CV carburettor from Mikuni . All machines are equipped with an electric starter . In the first series, a decompression lever had to be pulled by hand to start. The engine power is transmitted to the rear wheel via an eight-disc clutch in an oil bath, a five-speed gearbox and an O-ring chain .

The chassis is based on a single-tube frame with split beams. The telescopic fork has a standpipe diameter of 41 mm and is equipped with an air support. The rear wheel is equipped with a central spring strut.

In the first models SR 41 (B) and SR 42 a fuel tank made of sheet metal was installed that holds 29 liters, of which 6 l reserve. Consumption is around 5.5 liters of regular petrol per 100 km. The resulting high ranges make this machine a long-distance travel enduro. The high vehicle weight and the short suspension travel limit the off-road capability. However, they are suitable for gravel roads as well as easier to medium terrain or sand.

All models have a single disc brake at the front. While the SR41 initially has a drum brake at the rear, a disc brake is installed at the rear at the latest on the SR42 / 43 and the displacement is increased to approximately 800 cm³. This engine also has a 1-in-2 exhaust system. The name of this variant is Suzuki DR 800 S .

Technical specifications

  • Suspension travel front / rear: 240/220 mm
  • Steering head angle: 61.1 °
  • Trail: 136 mm
  • Front / rear tires: 90 / 90-21 / 130 / 80-17
  • Dry weight: 179 kg

Web links

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

Individual evidence

  1. ↑ motorcycle . No.  25 , 1987, pp. 6 .
  2. ↑ a b Thorsten Dentges: Let it be love . In: motorcycle . No. 10 , 2004 ( motorradonline.de ).
  3. ↑ Jarmo Haapamäki: Suzuki DR750S / DR800S Big. In: suzukicycles.org. Retrieved March 7, 2015 .