YEH,

Fooding your engine, when you have a pullstart is a pain in the arse

I can only think, that if it starts and sounds dull and overmuffled that is a flooded engine but it should then after about 5 seconds get louder and then sound nice and crisp again,

however if it starts but then cuts out as you let it settle to idle, this is usually your setting on he HSN being too rich
Try keeping your glowstarter in while your going round (dont be too rough) an if it doesnt go wrong then, that means its almost defianatly your settings too ich

If it sounds jerky at idle and usettled then the LSN is too lean, this causes it to conk out when setting off, if you open up the throttle, and it go's down to very low revs and conks out, it is too lean.