Kawasaki H1R

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Kawasaki 500H1R - Flickr - andrewbasterfield.jpg
Kawasaki H1R
Manufacturer Kawasaki Heavy Industries
Production period 1969 to 1973
class motorcycle
Motor data
Two-stroke engine , air-cooled three-cylinder engine , inlet with piston edge control
Displacement  (cm³) 499
Power  (kW / PS ) 80 hp at 9,500 rpm (1971)
Top speed (  km / h) 264
drive Chain
Brakes front: duo-duplex,
rear: simplex
Wheelbase  (mm) 1397
Empty weight  (kg) 136

The Kawasaki H1R was a racing motorcycle from the Japanese manufacturer Kawasaki , which was developed for use in the motorcycle world championship as well as for endurance races. The H1R emerged from the production model Kawasaki 500 H1 ; about 60 copies are said to have been made.

History and technology

After the performance of the air-cooled three-cylinder in the Kawasaki Mach III presented in September 1968 was recognized, a revised engine in slightly modified motorcycle frames was used in 1969 for the Daytona 200 , Isle of Man TT and Bol d'Or  - also by factory riders . The overall width of the engine of over 53 cm, due to the external ignition distributor and alternator, did not correspond to the common racing machines. The resulting reduced freedom from inclination had to be compensated for by positioning the motor higher. Equipped with a conventional ignition and a 35 mm Mikuni carburettor, the almost standard engine achieved an output of 75 hp at 9,000 rpm in 1969. The telescopic fork and the 250 mm duo-duplex brake on the front wheel were specially made . The racing motorcycle rolled on 3.00–18 (front) and 3.50–18 (rear) tires.

In 1970 the Kawasaki H1R took second place in the motorcycle world championship in the class up to 500 cm³ under private rider Ginger Molloy, behind Giacomo Agostini on MV Agusta . In 1971 the further development, the HR1A with 80 hp at 9,500 rpm, was presented. Dave Simmonds won the 1971 Spanish Grand Prix with this model . In 1972 the competition for the H1RA became greater and thus its success less. In particular, the high consumption of 18.8 liters per 100 km was a disadvantage on longer journeys. Disc brakes were still used on the front wheel of the 1973 model ; private drivers used the racing motorcycle in races until the end of 1974. For 1975 a water-cooled factory machine (H1RW) was used; Mick Grant won the senior race at the Isle of Man TT.

literature

Web links

Commons : Kawasaki H1R  - Collection of images, videos and audio files

Individual evidence

  1. ↑ Falloon (2001), p. 164.
  2. ↑ Falloon (2001), p. 38.
  3. ↑ Falloon (2001), p. 39.
  4. ↑ Falloon (2001), p. 40.
  5. ↑ Falloon (2001), p. 41.
  6. ↑ bonhams.com 1974 Kawasaki 500cc (accessed August 2, 2015)