Recently ran my first dyno on my 08 mutt 117, countless $ and hours building this engine and I built this engine myself. Numbers seem very weak for the work I've put in. My flow charts from my head work state that drag pipes can cause losses of up to 20hp compared to a good 2:1. I'm running bassani sweepers that sound great and look good. Don't get we wrong, this is a completely different bike after the upgrades, but the numbers don't quite show. Dyno guy said this should be a 130/130 engine, and a good 2:1 will should get me there, he also said my hp curve falls on its ass at 4500rpm due to the pipes. Wondering what you're thoughts are on hp losses with "drag" style pipes?