At least I don't feel so alone now. Once in a while my LeMans runs great, but very often it will have a bad day and vibrate, sputter and even stall on occasion pulling up to a stop. I've tried everything and its a little exasparating (sic??) to say the least. I tried the My15M and it ran like a raped ape for a day. Since I didn't feed the aforementioned ape its meds the next time I rode it the bike ran like crap! I've tried the PCIII USB and was rewarded with similar schizo behaviour. I've had it re-mapped twice by two different dealers and its still not spot on. The guy that did the most recent map said that there's no compensation in the system for things like hot, humid weather and mentioned something about running two different maps. To me that is not a convenient approach and is utterly unacceptable. I've also pondered the possibility that maybe something else in the system is at fault like the fuel pump or pressure regulator, but the fact that it almost always acts up at part throttle (3500-4000 RPM) leads me to believe that its still the ECU causing the problem(s). In general it runs a little better since I changed the TPS to the Harley version, reset it for the proper voltage and sync'ed the TB's with a TwinMax unit. I always knew that earlier Guzzis were quirky beasts and I had hoped that they got it right with the V11, but I don't think so.