two more things that i've noticed. the clunk tubing was very loose on the brass tube, i wonder if the engine is sucking some air when it's trying to get fuel?
another thing is that where the muffler meets the engine, there are some black oil stains. I'm going to put a gasket between the muffler and the engine to see if it stops the leakage.
if the engine is overheating, could it be because of the needle setting?
and what causes the engine to stop mid air after few minutes? if the engine is over heating in the air, it has to be the needle or something else?