There have been many threads about changing bars on the Mille.
My first Aprilia was a new ’03 Tuono. I was already tired of low bars and found it perfect for me. I then got a salvage Mille for trackdays and a loaner. I hardly rode it at all because of the bars. I finally put the same bar setup on it that I have on the Tuono. These are 1982 Yamaha Seca 650 bars in adapter sleeves. They are exactly the same WIDTH as the Mille bars, but the same height and fore-aft position as the Tuono bars. The wrist angle is just right.
The Mille mirror mounts just touch the bars at full lock. I cut the eBay fairing just behind the second shield mount screw, just past the mirror mount, and down to about one inch behind the top edge of the hand guard. I painted it with a spraycan and kept the stock one for restoration. The screen is as long in the center as stock, with the sides cut off. I left the hand guards off since the bars are not behind them anymore.
The Mille now feels just like the Tuono, but with better aerodynamics. I discovered the Sargent seat was noticeable in its absence. Today’s Mille ride to the mountains pointed out the maintenance needed on the 13K+ Tuono. That Ohlins shock sure is nice, too.
NOTE to appearance perfectionists:
This is a SALVAGE Mille bought for trackdays. Repairs were made with eBay parts and spraycan.