I think this goes into the category "How to make a bunch of riders happy?" Answer: apply correction factors when doing a dyno of their bikes. LOL
Seriosly, this is only good for bragging rights. Could you answer a simple question - what was the actual HP at the rear wheel of your bike? Because that's what matters, and that's what I'd like to know, and that's the HP you will be applying when you ride.
Then and only then, you can give me correction factors, so that your HP can be compared to other bikes' power.