You are definitely at the upper end of the springs usefulness, but perhaps not quite out of it. Really close though. A spring change would be best, other changes would depend on what you are planning for the bike. I saw in another thread you plan on some track time. I would think that unless you plan on racing the stock equipment resprung could work out fine for you. I am still running the stock setup for now, my son is a pretty fast rider, and probably outweighs you by a little bit. He's also a bit on the tall side. The bike is working out for both of us on the track and in the canyons.