Kawasaki introduced the 3 Cylinder, 2-Stroke, 750cc MACH IV motorcycle in 1972 as a big brother to the 500cc MACH III they introduced in 1969.
Why not make a 750? – After all, that 500 MACH III was the fastest and quickest “production vehicle” you could buy in 1969 and 1970. No car or other motorcycle available for sale then could beat the 500 MACH III in the quarter mile. As other companies were trying to catch-up, Kawasaki released the 750 MACH IV in 1972 to make sure that the Kawasaki name stayed on top of the food chain through the quarter mile.