I got a question, i've been searching for the link for the spark plug reference pictures (that show examples of lean and rich plugs).
Another question, do the NGK Iridium spark plugs show richness the same as the stock plugs?
Reason for these questions: I put 155 main jets, 45 pilots, thruxton needles, mix screw is out 3 1/4 turns. I got large cannon specialty spare exhaust and the freak installed. The plugs look lean, no matter what i do they still look lean to me. No nice chocolate color yet.
