Hi, im hoping someone on here could help me with a bit of an issue, i have an iron horse which i have got going again, i have took the head off and cleaned it, took the carburettor apart and cleaned it and the and everything is good there, i have also put a new spark plug on as well, it starts and ticks over like a sowing machine but as soon as i put the throttle on it reves up but then cuts out like it starving of fuel or getting too much air but im not sure can anyone help thanks james