Kawasaki GPZ1100B1/B2
In 1981, Kawasaki released the GPz1100B1 followed by the GPz1100B2 in 1982. Both models featured a 4 cylinder, 2 valve air-cooled engine design with a capacity of 1089cc producing 108bhp in the B1 and 109bhp in the B2. The design was similar to previous engines used on the popular z1000 series.