The air screws are intake side I.e turning them out lets in more air, I think! Assuming the jetting is correct, I think they might be set too rich.
I've got an A10 as well, a RGS replica, one of my favourite bikes. Having said that, the unit Triumph twins make far more sense on busy roads, they handle well, have great brakes and are pretty reliable, once sorted.
Cheers
ATG
Paul