I never switched to synthetic
I simply use the recommended dyno oil and fluids and change all of them every 6,000 miles. Keeps it simple. Coming up on my 36,000 mile change soon and there is a local company that will analyze oils for free, so that is the next step. So far, all look good and clean, the magnet plugs have a little fuzz, so I'm staying with what has worked, unless something unexpected is found. Probably drill the clutch weep hole soon too.
Lots of information on the forum on switching oils, and my local Tampa dealer has said that to them, it doesnt really matter. If it is changed often enough, INHO most recommended oils will work. I'm not a proponent of trying to get extended miles out of the least costly maintenance item for my bike.
12 K1600 GTL
02 K1200 LT (gone but not forgotten)