Just for learnings sake, I'll recap the legitimate things I've heard: -FMF powerbomb header (smoothens power delivery). -Double headgaskets (drops compression). -Different throttle cam system. -Heavier flywheel (reduces how quick the engine spins up, increases low end centrifugal force helping piston keep smooth movement at lower RPMs) -Lower tooth rear sprocket (less power, higher top speed). Let's stick to the ones that work. I'm interested in hearing knowledgable peoples opinions on the above options and the pro's and con's of all of them. I'm not at all interested in dropping the power of my bike, but I am interested in learning some stuff!