it changes regulary, only special people off here get mentioned, well done
martinsmith1979 -
when tuning the lsn its sort of the same as the hsn but instead of looking at top speed u'll be seeing an improvment in acceleration. As u lean it out u will see it pull away faster, when the lsn gets too lean u will see little or no smoke and u'll also hear the engine screaming it'll sound like it working too hard.
physically if its too lean it'll probably stall on you but also look out for a fast pull away to a sudden slow down or very un-easy revs (as if the engine is coughing)
Basically start then engine and get it warmed up,lean the lsn by one 1/8 of a turn and accelerate for about 5 seconds then stop wait a few seconds for the revs to drop a bit and do it again. Repeat a few times until u've seen the improvement (it maybe very small and barely noticable at first) the turn the lsn by 1/8 again and repeat the whole thing.
keep doing it until u encounter the symtoms mentioned above, at the stage back of 1/8-1/4 of a turn, u want a fast smooth accelration with a decent trail of smoke and rememeber its the acceleration u'r focusing on not top speed. When the lsn is to lean u'll see little smoke when its to too lean the problems start
Your idle will more than likely need adjusting afterwards