easy now guys i'm not a rocket scientist my bike has bored carbs cool head domes 22cc cpi pipes uncut flywheel, stock timing, the last jugs i had on were just cleaned up just the casting flaws and i was running 420 mains how is this possible plugs are perfect.i just put my ported cylinders back on and just taped my air box up for breakin has pro flow top of air box has about 14 1 inchholes and i taped all shut but 2 holes how much bigger on the main should i go thanks later