I have a 94 V-max 500 ST with PSI pipe, aftermarket helix, not sure what it is. I played with it last year and had it up to 95mph. I think thats pretty good for a 500 long track. The only problem was I got beat by a Polaris that should have been in the scrap yard. I want to be sure that wont happen this year. I don't think it will with the Viper as it is. I have to blow this guy away this year no matter what. When I seen the Viper at the dealer I had to have it. Love at first site I guess. I figured its a Yamaha 700 tripple and its black and beutifull, Can't go wrong. The guy that beat me has already seen the Viper. So he may be stepping up also. If he is I hope I'm ready. I was thinking about the heel clickers. How mutch will they improve 0-80mph? And how mutch will the top end suffer if its set up for 0-80?