Where is the bog? Is it stumbling or burbling right off the bottom? Or is it the transition from bottom to mid?
With the RB-Designs carb -> I know the sensitivity of the air screw is much greater. Keep this in mind if tweaking and taking advice on air screw settings from others, you could get off in the weeds pretty fast.
I would note the baseline air screw setting that Ron set up for you - and then go in an 1/8 to 1/4 turn to see if it cleans it up.
I rode Magellan's bike with the RB-Designs Carb - I was very, very impressed. Very Clean and Very Fast. This was without the head mod too.
Oh and sounds like you need to clean out your pv cover and check to make sure the pv linkage is working right.
jeff
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