KAWASAKI H2R BRIEF HISTORY The Kawasaki H2R was a racing motorcycle built by Kawasaki from 1972 to 1974. It was based on the road going Kawasaki H2 Mach IV air cooled, two stroke triple . In 1975 it was replaced by a Water cooled development, the Kawasaki KR750. Timeline 1971 The AMA had announced that the regulations for 1972 had been changed to allow 750 cc two strokes to compete in 750 cc class, leading Kawasaki to develop a race version of the road-going H2. The engine was powerful but fragile. The chassis of the H2R was derived from the chassis used on the H1R which had been derived from the Kawasaki 250 racers and was effectively an enlargement of the 1968 125 cc frame. This frame had been based on the Norton Featherbed. To overcome the vibration of the larger engines, the engine was rubber-mounted which affected the stiffness of the frame as the engine was no longer contributing to its rigidity. The H2 was thirsty, initially only g...
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