Now, notice the difference that was done to the AVL combustion chamber.
Pic #1 is the stock AVL chamber
Pic #2 is the Ace Chamber
Note that the Ace chamber is completely different shape for improved flow, has bigger valves, is more compact for higher compression, has more squish area for improved mixture motion, and is coated with the CerMet Thermal Barrier coating.
Yes, there is a little scar on the metal near that one edge of the chamber, but that whole thing was all welded-up, and re-shaped by hand, and then surface milled for flatness. The little scar will not be any problem. Didn't want to mill the head down any further than that.
That was a huge amount of work, and a will be a great improvement to the power of the bike. This is a major step forward on the AVL.
There might need to be a little retarding adjustment on the ignition timing, but we'll see how it does first, and adjust if needed.
9.8:1 compression ratio on this.
This can also be done to the UCE, because the UCE chamber is the same as the AVL.