It looks like the Boano fairing meant for the RD07A Africa Twin (by the way the side panels and air scoops are shaped.
The cut out parts have been filled in with orange...plexiglass maybe.
I'd have thought the AT fairing was wider at the fuel tank but possibly the assembly is flexible enough to be pulled inward to Transalp dimensions.
The only part I question is if there is an effective way for hot air to exit the radiators which would likely be a factor in our climate.
Nice job with the mods. You'll find the Boano stuff significantly more expensive to get here.....as always.