Suzuki TR 750

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Suzuki
TR 750
Manufacturer Suzuki
Production period 1972 to 1973
class motorcycle
Motor data
Two-stroke engine , water-cooled three-cylinder engine , inlet with piston edge control
Displacement  (cm³) 738
Power  (kW / PS ) 105 hp at 8000 rpm (1972)
115 hp (1975)
Top speed (  km / h) 275 (1972)
290 (1975)
drive Chain
Brakes front: double disc (233 mm)
rear: disc (200 mm)
Wheelbase  (mm) 1416
Empty weight  (kg) 154

The Suzuki TR 750 was a racing motorcycle from the Japanese manufacturer Suzuki , which was developed for the Formula 750 . Barry Sheene won the 1973 season and was runner-up in 1975 .

History and technology

The racing motorcycle, known internally as XR 11 , was developed from the Suzuki GT 750 series model . The enhanced performance, water-cooled three-cylinder in-line engine (bore / stroke: 70 × 64 mm) with contactless thyristor magneto ignition was supplied with fuel via three 32 mm Mikuni carburettors. As with the production model, lubrication was carried out using fresh oil, the Suzuki CCI system (Crankshaft Cylinder Injection). The power was transferred to the rear wheel via a dry clutch and a five-speed gearbox. The usable speed range ranged from 6000 to 7500 rpm, the maximum torque (93 Nm) was reached at 7000 rpm. The double-loop tubular frame from the series has been lightened to reduce weight. Dunlop racing tires, sizes 3.25–18 at the front and 3.50–18 at the rear, replaced the standard tires.

The chassis did not do justice to the "brute" performance. When it debuted, the Suzuki TR 750 was nicknamed “Flexi-Flyer” (wobbly). "The catastrophic driving characteristics of the fastest racing machine of its time resulted from an unfavorable weight distribution in connection with a high center of gravity."

"The TR 750 had such a bad reputation as few racing machines. [...] Only the brilliance of a Barry Sheene brought the XR 11 victories - nevertheless, the Flexi-Flyer is remembered as the first large two-stroke racing machine of the modern age."

- Alan Cathcart.

John Newbold's racing motorcycle, who thus finished fifth in the 1975 season, was auctioned at Bonhams for over 76,000 euros.

literature

  • Joachim Kuch , Jürgen Gaßebner: Suzuki. Motorcycles since 1952. Motorbuch Verlag Stuttgart, 1st edition 2001, ISBN 3-613-02091-2 .
  • Siegfried Rauch: Famous racing motorcycles - 150 old and new racing machines for Grand Prix use . 2nd Edition. Motorbuch Verlag, Stuttgart 1980, ISBN 3-87943-590-1 .

Web links

Individual evidence

  1. ^ Siegfried Rauch: Famous racing motorcycles. P. 235
  2. ↑ Joachim Kuch, Jürgen Gaßebner: Suzuki. P. 35
  3. ^ In: Joachim Kuch, Jürgen Gaßebner: Suzuki. P. 36
  4. ↑ bonhams.com Lot 260 (accessed June 13, 2015)