it does seem like the mixture is too rich, but only after its been running for a little while. it's really weird- i was trying to fix it last night, and like i said it would start up great but then it would kind of do this intermittent acceleration thing, like someone else was working the throttle, and it wouldn't really respond even if i gave it full throttle. the crazy thing was that after it started doing this it would idle GREAT, which i couldn't get it to do before. so i did try leaning it out a whole bunch, but it still did the same thing. i'm thinking maybe my main jet is too big-- could this be? if so, where can i get a new one? thanks!