We also have a 2000 Tomos Sprint that we liked so much that we bought three more new ones online from Steve's Mopeds in New Jersey. Our local Tomos dealer says he was driven out of business by cheap Chinese bikes. One won't start at all. Another runs only with the choke on. And the third runs for a couple of minutes, but then stalls out. We suspect that Steve did absolutely nothing to tune them up, and we've never looked at carbs either, so we're pretty lost.