O wouldn't touch valve adjustment on this thing myself. They make replacing the spark plugs a major pain, jet valve adjustment is 99% worse. I'd much rather have it done and spend a couple hundo. Well worth it.
+1 I have 4 dealers within 25 miles and will leave it to someone who has done a number of them. I picked my dealer because they do a lot of Triumph work and seem to know what they are talking about. I do simple maintenance but that's it.