Hello,I just started driving my Xt2 yestarday after a few months of not using it. I thought my engine was running fine but then I started trying to tune it. Then today i was still trying to tune it but when it got going then i hit full throttle then the engine sputtered and then died. Every time there was lots of smoke from the pipe so it was running pretty rich. So i lean it out a little but then when i gave it full throttle it sputtered and died again but at a higher speed this time and not much smoke at all. Is it possible to be running too rich that it will stall your engine? Thanks for your input if you have any.