I bought a leftover 2011 TXC 511, and I absolutely love it. However, I have about two hours on it, and it seems to stall a lot. It clunks out in first gear even under steady throttle, yet low rpm's - more so than should be expected. I just came off a Ktm 450 SX (carb) and never had this problem. Has anyone else had this problem? Is there a remedy? Any insight would be hugely appreciated.