Factory / Break in settings on HSN is 3 1/2 turns out. But remember these usually come with 3 needle carbs. The PICCO based engine I have is a 2 needle carb.

Once broken in, my VZB V-spec Speed (?) (black head) liked to run quite lean.....and it RIPPED. After a tank, if I spit on the head a bit and it bubbles off instantly....I know I'm running too lean. Just keep a decent amount of smoke coming out of the pipe and make sure it doesn't get too hot....that's my experience.

Any one else with more detailed info???