The problem with all these aftermarket tuning aids is that to get them to work properly they need to be set up on a rolling road with proper gas analysis. Settings given by the manufacturers are really only approximate at best. My K8 Vee was quite lumpy originally and was improved by fitting a pair of cans and timing retard eliminator (TRE). In spite of the generally held wisdom that Vees suffer lumpy low end running due to weak fuelling to reduce emissions mine has always run rich, which may account for it's lousy fuel consumption. I then fitted a Power Commander with a map that most nearly matched my bike which did improve the fuel consumption slightly, leaned it off a bit but also improved the low end running and the bike will happily chug along in town traffic. Is the Healtech American by any chance as the US Vees did not have oxygen sensors fitted which UK bikes do have, and I had to disconnect mine in accord with the P.Cs map I used. Suggest you check this..