It's a bit difficult to know who exactly invented the snowmobile ... and the steering skis would snap. One more trip to the drawing board followed and Yamaha reemerged, this time for real ...

Though Yamaha is hardly alone in packing a supercharger into some of its models, Kawasaki's Ultra jet skis are also making some impressive power. With a displacement of 1812cc's the supercharged 4 ...