My goal for my engine is most HP between 10,000 and 12,000 rpm and increase throttle responce, drivability, idle, and power below 8k doesn't matter.. I installed the K&N R-0990 and measured to make sure the intake track was the proper length, it was 7.5" perfect, I also removed all casting flaws from the head. I will either install high compression pistons, or deck the cylinder, I will broaden the intake port, polish the combustion chamber and the exhaust. I plan on installing an intake cam in the exhaust and retarding the cam gear a few degrees, but that is uncharted territory, and I won't have any dyno access until the beginning of April, and even then it will be difficult and I won't have many tools, so I don't know if I will be able to adjust cam timing. So far the bike is running a hell of a lot better than stock, pulls very smooth, jetting is perfect. Let's hope the engine build keeps going this smooth.
I'm not sure how far the stock coils will...