It seems this type of issue is very common with the TW. I have the same problem now. Some have stated that they had problems such as this, and that a new CDI box fixed it for them. I have cleaned out the carb, checked the operation of the float bowl, replaced the ignition coil, and replaced the CDI so far. Still having the problem...getting a little sick of dicking around with the dumb thing to be honest. I'll post on the board if (when) I fix the problem. If you could do the same that would be much appreciated. Oh and, by the way, if I were you, I'd be very suspicious that the previous owner may have had knowledge of the problem prior to selling the bike!