The mileage of Kawasaki superbikes solely depend upon their engine size. The range of engines start from 250 cc and goes up to 1400 cc for the Ninja series only. The variation depends upon the technology being used and the weight of the bike. A Kawasaki 250 cc motor can return 30 kmpl at good highway times whereas we can expect merely 10 kmpl from the 1400 cc on the same track. Also they have a supercharged Ninja H2 which can go as low as 5 kmpl.