[oldishwinger]

the whine could just be Harmonics coming from the new belts, and will diminish with time.

I had new belts fitted by a mechanic, and when I rode, there was a wicked whine, and it sounded like a new tensioner was bad, so I had the belts checked. all was good.

The mechanic explained it is harmonics caused by the new belts running on slightly worn wheels, and will diminish with time. He applied some belt oil to quieten things down, and he was right.