I have 1997 Dyna Wide Glide. Rebuilt CV carb. 45 pilot jet and 180 main. Shimmed stock needle.

I bought a Ness Big Sucker stage 2 and added V&H short shots as well. My trouble is when I have the air filter on, I get sneezing almost right as I open the throttle. If I take filter off and just keep backing plate attached to cylinders, I have no sneezing in the same scenario. Does not having the filter and it not sneezing as I open thw throttle mean Im needing more air? Or am I throwing too much fuel? I have had black plugs throughout my quest to rejet correctly from 45/46 and 170, 175, 180 mains.

 

how many turns out is your idle mixture screw?
m

 

I was about 1.5 turns out when i got stumble but I couldnt get it to stumble on the way out. I went over 3 turns with no stumble. I did adjustments with air cleaner on FWIW

 

Hmmm. Weird. Took 1 shim off the needle and ran around the neighborhood for 25 mins or so. These are the same plugs. The white one is this morning the other is before the ride.

 

Either I set the gapping light on both plugs at .37 instead of .40, the gap narrowed