If you don't have any suspension work, get some done. Get some shocks, whatever you can afford, a arms, wider axle. All these things are more or less bolt on hp, because it will let you ride your bike harder and faster, using more of the power your machine already has. Seriously, you don't have any idea as to what your missing. The Elkas were such an improvement, then the wider axle even better handling, can it get better?? I'll find out when I get my wider a arms.
Scott