I agree with Dennis, I had a 1996 Kawasaki TS (Tandem Sport) That I bought cheap with a bad top end on it. I had a top end for a 650 mod kit on the shelf, from my race ski efforts, and dumped it on the TS for giggles. I readjusted the carb, different pipe, Advanced the timing a couple degrees back and forth, and after about 5 days of tinkering to get it to run dependably... I converted it back to stock, and it was a happier ski after that. The economy of fuel was about twice as good too. Oh YEA...TS also meant TOW SKI...when the race ski's broke down. lol
Karl