Re: something wrong in there
My suggestion, talk to Jim a.k.a. CreativeEngineering, the Manic Mechanic and get one of his engines. The same 2-stroke you had only much improved. I think you would be very happy with it even though it cost a little more even with his core exchange refund.
"I would rather be exposed to the inconveniences attending too much liberty than to those attending too small a degree of it." - Thomas Jefferson