I have a fuel problem

[gofastsandman]

Old school here. Take the air box off and put your hand on each throat while runnin`.
If you hear more rpm in one, there you go. Don`t do this for long, just to see if you can isolate to one throat. As Bushwacker said runnin` premix can be a double edged sword.

Have you done a compression test? That is always tops on my list.

Cheers,
Us.