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Yamaha YZR 500 1980 - 1989
1981
The Yamaha raced the YZR 500 since 1973 - for 30 years over 28 generations. Till 2002 20 different riders won 115 races for Yamaha, and also won 11 world championships and 9 constructor's championships with the YZR. Yamaha YZR500, 1980-1989 Kenny Roberts received the Yamaha 0W54 for the 1981
season, a square four with rotary valves. The bike had a broader powerband but
was more difficult to ride as it was heavier. Barry Sheene got this bike also
later in the season and won the Swedish GP with it. Again Yamaha used their experience and after the rotary
valves on the Yamaha 0W54 now the V-four layout of the famous 250 cc RD05A was
used for the new Yamaha 0W61 in 1982. The same reasoning as in the 1960's led to
this change. Yamaha wanted to make a smaller bike with better handling. The
carburetors and rotary valves were mounted between the cylinderbanks (60 degrees
"V"), a method still used today. The rearsuspension unit was mounted square on
the driving direction and the suspension travel. The frame was a pre-Deltabox
type. Kenny Roberts used the bike for the first time on the Salzburgring and set
a personal record with it.
1983
1984
1987
1989
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Any corrections or more information on these motorcycles will be kindly appreciated. |