I dont know because the top end is fine. If I go any leaner on the HSN it will be too lean right at the top end. Right at top end runs fine.
Off the idle its fine. If I leave it for any more than 10-15 seconds it will start to bog when I take off so I know its on the richer side rather than lean on the LSN. But even when I open the throttle very little and creep forward at a slow pace for a few seconds then nail it it bogs down and puffs out a decent cloud of smoke before clearing out.
So the very top is fine and off the idle is fine. If I change any needle settings its going to stuff these areas up. Its the parts inbetween when holding the revs in one spot for a few seconds.