I had read somewhere here about engine tunning. The thing that im looking for is about if you pinch the fuel line and the engine revs a little bit (revs almost nothing)and then dies about 5 to 6 second lateris it lean or rich or the other way around if it revs alot for about 5 second and then dies(lean or rich). Im tunning a new engine the max temp that the engine gets its 210. sometimes if I give full speed it dies? rich or lean. It has a good smoke trail. I have driven it for 2 tanks for about 3 min. at a time and in idle its spits drops of fuel/oil but it doesnt smoke. good or bad. thanks for youre help. Oh bythe way the engine is a axe motor rossi speed