Cen,

Just sharing my experience.
I found that the low speed needle is quite sensitive, if set too rich the engine would be difficult to start, my LSN is set about 2 turns out. once broken-in make sure that you set the HSN so that good smoke is visible at all times. The fuel tank cap should give a bit of "pop" noise when you lift it meaning it's sealing properly, otherwise it would be hard to start up and it may cause the engine run unexpectedly leaner. Tighten the screw on the bottom of the cap a little if you have some air leak.