I had the complete National Kit on my banshee. I wouldn't pay anything extra for the work but it was a great motor. I had the National "Hi-Rev" porting with the PT "Hi-Rev" pipes. It was great for duning and the every now and then drag. It did good and held its own on the drag strip against eqaully built machines, but I would look else where if your looking for a drag bike. It Didn't have much on the bottom with the Hi-Rev pipes and Hi-Rev porting so it wasn't very trail friendly but made a great Duner. Overall I would recommend it, I just wouldn't pay extra for it to say "national" on the jug.