I find these discussions on sprocket swaps informative. I am constantly doing this on bicycles--except that on a bicycle you are dealing with a 10 sprocket cluster in the rear and a 2 or 3 chainring cluster in the front. It gets quite complicated because in the end, you are the engine. Like Alex, I plan to leave things alone. I like the quiet exhaust, so that will stay stock. I also have no complaints about the performance. I do think that the Kawa engineers did their homework--after all, you have to have done something right to be the top 250 since 1986. My only gripe with Kawa is that their factory Shop Manual leaves a lot to be desired. It very briefly describes procedures and only mentions special tools. It could, for example mention that the rear axle requires a 24mm socket. The DIYs on this forum make the manual look sick. This sprocker DIY is great for those wishing to replace worn sprockets.
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