Well it explains plenty. Hanso kindly sent me some tunes after I got the CES headers and I downloaded one. It worked great for a while and then suddenly started running like a pig and not idling. Sometimes it was OK. I recently asked if tunes can be "unstable" and no one took it seriously. Worst thing I ever did to my bike was fiddle with the tune. Hopefully I can restore it to what it was before. Thanks for posting Hanso. I really wish I'd left it alone though.