Originally Posted by killercanuck
What kind of carb do you mean? Vent tube sounds like a CNS? The vent tube does need to vent on cns type, chinagirls vent through the 'tickle' button. No venting, I think, means the vapour can hold the float open. (gas expands)
Try with the vent tube open, go for a quick boot around the block, and double check its not still doing it.
It is the CNS carb and you are right, I took the carb apart today to inspect it and everything inside was fine. I opened up the vent tube on top and that fixed it, she runs like a top now. Thanks!