Sleds were in a warehouse and trailers for storage. A deep pockets owner was into Kawasaki and made sure the players had what ever they wanted. It was said that you could port the 8 port motors all you wanted. The power gain was small and the life of the engine was also small. The engineers at Kawasaki had the best of everything for building the motors so they are great just as they are. Anyone running these motors should run the stock classes and they will be very competitive. 4/6 was also taken "almost" to the edge. Sprocket has managed to take those jugs to the edge.