If I didn't see it with my own eyes I'd call me a lair.
My 1994 Road King came with a detachable windshield that over time turned dull/hazy/yellow/flaking.
I used it because I can see over it but looking through it was tough.
I was told about the oven cleaner a long time ago but never gave it any real consideration, kind of like an urban legend. Well I got to talking to a few of the guys and they unanimously agreed that it was true and it did work.
I went over to the 99cent store and bought the can of oven cleaner
I removed the leather windshield bag
I propped the windshield up against an old plastic compound bucket
Sprayed both sides thick
Went in got a cold drink
10 minutes later I hosed it off
It really really looks brand new.
The stuff rolled right off and the windshield is as clear as the day I bought the bike.
Total cost: $1.07 with tax.

Think it will work on tinted windsheilds

The oven cleaner removes the coating.
When the windshields are made they coat them for scratch resistance. The Coatings are usually sprayed on and dry like paint.
Over time the coatings degrade with sun exposure, causing them to yellow like wood varnish or a honey color. Eventually the coatings start to fleck off like a paint would.
My windshield was pretty bad, the coating was shrinking and cracking. If I took my fingernail I could scratch the stuff off.
The oven cleaner actually dissolved it and as I hosed it off it just rolled off onto the ground.

Tinting can be in the glass or a film as I understand it. If its in the glass, forget it. But- if it is a film - you probably can peel it off.
Use some dish detergent water, start at an edge and start working the water under the film and as it gets wet it will release from the plexiglass.
IF the tint was a sprayed coating? I don't know how or if they do that but maybe- the oven cleaner should take it off.
Let us all know for future reference if you do it.