How many miles since the last change? 6K miles or so, don't worry about it. If you have synth in it, even better. I would start thinking about it at 7 or 8 K miles especially when on a trip with highway miles.
I agree with any oil.
What happened to 20W50? Did someone change the engine while it was in my garage this last 4 years?
My other bike is a BMW
RA & MOA #224