Come out on your low end and turn up the idle if you need to. Make sure your mid needle is flush and at 1:00. Every 1/8th of a turn on that mid needle can open or close it up. To see what Im talking about you could take your HSN off the carb and look down into the mid needle and turn it. Just make sure that hole is open, flush with the outside of the carb body and at 1:00. You can always do a pinch test on the fuel line about 3 inches off the fuel nipple. You should get 3-4 seconds before it revs up and dies out. If it dies out before 3-4 seconds, it's too lean. If it dies out after 3-4 seconds it's too rich. This method is just a starting point/reference.