Back to Regular Oil - Bad for Engine?

[Charlie Bravo_imp]

I've had bikes that were run on full-syn and at the first change I went back to dead dinosaurs. The bike ran smoother, with less mechanical noise, revved better, and with less vibration. Of course, this is all butt-dyno data. When I had the Yami FJR, I went onto their forum to look around, and of course checked oil recommendations. They had only one oil thread, which was: RUN ANY DARN OIL YOU WANT!