I tried the Belray 80w in my '01 220 and put in the full liter as I read that there was no problem handling that capacity. My bike started shifting much harder, and I was hitting neutral in crucial situations (very frustrating!) So I went back to Motul 10w-30 and to the recommended 700ml. The bike now shifts much smoother and I find myself at the top of the hill instead of screaming in the middle.;)
Hrms, I've used Spectro 80W for a while. Not had any issues.
Recently used 10w-40 as I was out of the 80w and had IMHO a few more neutrals. Just replaced it with the 80w again. Not a full quart but high on the site glass as recommended and while it's still a little noisy. It seems better to me.