Busaboy
.040 Over
I don't know if that tune will change the stalling problem. Try it. Uncheck the O2 sensor. Do the reset adapt, then the 12 minute tune - wait 12 minutes after the fan comes on without touching the throttle.
Does it ever idle OK? If not, jack up the idle in the idle table. If it is idling OK, except when you come to a stop, then something's wrong. Could be the TPS. I had this same problem but it only started after I had a PCIII installed and tuned. I noticed he had a +5% trim in the idle area. So I thought maybe it was getting too much fuel and flooding. I removed that +5% and it stopped doing it.
The engine idles OK. The problem only seems to occur coming to a stop in 1st gear. For such a large engine I would not think it would stall so easily. Once I get the bike on the scanner I will see what I can do.