You're getting closer. Now try it just a tad more richer to see if that helps. The good old spit test will give you some clues. Run it full throttle, bring it in as fast as you can, pull off the cover and place a drop of water on the head to see how fast it vaporizes. If it sizzles, bubbles quickly then it's too lean. If it's cool enough to where you can touch the water-cooling jacket for a few seconds then you're close or slightly rich.