The barrels are 1000R Exup.1989/90 indicated by the 3GM prefix.
I cannot tell from the pics of the head.
It looks like it has been overpainted black by a P.O.
I do not believe that this top end can be fitted to the 2GH 989cc bottom end.
You fail to show the clutch housing outer casing which is an easy reference point.
This now makes your questions on the TCI availability in another post totally irrelevant.

Sent from my keyboard using the English language not some teen text shite from a fooking phone.