swop the plug and if that doesn't cure it then you are drowning the plug.Lean the LSN 1/8 of a turn at a time..despite the flush/flush factory settings I'm on my 6th GO engine and I've never had one yet that will idle without the glow starter until I lean the bottom end at least 1/2 a turn..DO NOT lean the HSN!! This might cure the idling problem as it will lean the bottom end as well but will cause you all sorts of problems the moment you start to rev it some!

Oh and I forgot ..for god's sake take off the air filter and set the idle gap to .7mm-1.0mm before you do anything.Then if it still won't idle follow the above.