Ok, not sure if I have this problem anymore as I have rebuilt the bike. I do still wonder about it though. I would start the bike full choke, drop it to half. Get on to ride it and without even touching the gas and while just coasting down an incline the engine would stall. It would start right up again and run fine....but did it every time when starting cold. What would cause such behavior? It would only stall if left to idle, not being revved.