Honda RC149

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Honda
Honda RC149.jpg
Honda RC149
Manufacturer
Sales description RC149
Production period 1965 to 1966
class motorcycle
design type Racing motorcycle
Motor data
Five - cylinder four-stroke in - line engine
Displacement  (cm³) 124.42 cm³
Power  (kW / PS ) 25 kW (34 PS) kW at 20,500 rpm
Top speed (  km / h) over 220 km / h
transmission 8 courses
drive Chain
Empty weight  (kg) 85 kg

The RC149 was a racing motorcycle from the Japanese motorcycle manufacturer Honda , which was used from 1965 to 1966. To date, the Honda RC149 is the only motorcycle with a five-cylinder in - line engine .

technology

Equipped with a five-cylinder four-stroke engine , the machine developed 25  kW (34  hp ) at the still enormous speed of 20,500 rpm. This corresponds to a liter output of 272 hp. The engine of the RC149 already had four valves per cylinder, which were controlled by two spur gear - driven camshafts . With a bore of 35.5 mm and a stroke of 25.14 mm, a compression of 12.0: 1 was achieved. The exhaust gases were discharged through a five-in-five exhaust system. The drive was created by modifying the Honda RC116 , a two-cylinder with 50 cm³ displacement, by using the engine two and a half times. The motorcycle weighed 85 kg.

Racing use

Luigi Taveri on a Honda RC in Salzburg (2006)

The Swiss Luigi Taveri was the driver RC149 in the motorcycle world championship in 1966 and won five victories in ten races the title in the 125cc class of the Motorcycle World Championship .

The number of cylinders was not limited by the racing regulations in the 1960s, so that high liter outputs could be extracted from small four-stroke engines. In this way, Honda was able to e.g. B. also in the class up to 250 cm³ with the RC166 and its six-cylinder four-stroke engine to prevail against the strong competition of two-stroke machines at the time . When the regulations were amended to limit the number of cylinders - Honda had prepared a three-cylinder with 50 cm³ - Honda withdrew from racing at the end of the motorcycle world championship in 1967 . After returning to motorcycle racing in 1979 , with the unsuccessful appearance of the Honda NR 500 , Honda was forced to switch from four-stroke to two-stroke racing machines.

Web links

Individual evidence

  1. ↑ honda.com: Honda RC 149 - technical data
  2. ↑ Siegfried Rauch : Famous Racing Motorcycles - 150 old and new racing machines for Grand Prix use. 1st edition, Motorbuch Verlag, Stuttgart 1979, ISBN 3-87943-590-1 , page 78