Stuck at step 1 I see.Rated 189bhp at the engine, which is not that much down on power compared to 17-19 contemporary 1000s (6hp to 11hp diff.), even stock 165rwhp would mean 13% drive train loss to friction - a rather high number for a motorcycle.
Restore the ETV tables to EU stock and remove the intake tube restrictions and you have restored the bikes to Honda advertised power levels.
Add a full exhaust and decent tune and these bikes are 180rwhp+ bikes.
In this example your own ECU flash only made 164hp compared to 156hp stock, a +8hp improvement. A simple derestriction should add more than that. And that is with the "stage 2" tune, what does the stage 1 tune do?
A full exhaust is not going to add another 16+ horsepower.