thermoquad help

No effect of the tuning screws is way to righ or lean. Considering the plugs still look brand new, I think yur way to lean along with the other clue of surge and pop. The other thing is, "It clears up when the scondaries are opening" is another sign of lean.

These things (TQ's) do take a leaning curve. Once you have takin the time to dial it in, you'll be fine.

I run my TQ lean on my 400. Once it warms up, it is very crisp. But it needs to warm up. The hot air takes up more space than cold air. Less air (When warm) has the carb running a ever so slight tad richer.