Jason is right. I'm not concerned with getting more power...I've had this thing for 4 years and it still scares the crap out of me at times when I crack the throttle. I'm concerned that something is wrong and at almost 11k miles, I shouldn't be having motor issues. These come stock with 180 hp to the crank....and the dyno sheet Bubba posted is correct. I've seen these dyno anywhere from 152-157 hp to the wheel. So for this being almost 20 hp off, something isn't right and I noticed it last year when I went to the track and the top end felt very sluggish. More than anything, I wanted to put a feeler out to see if there might be an issue I wasn't aware of. Maintenance will happen, that's a given, but changing fuel and spark plugs isn't going to remedy 20 hp.