I just picked up my ’11 XP a few days ago, and love it so far. My only minor complaint would be a relatively lack of bottom end before that big top end rush. The previous owner put on a set of 29" 1K wheels and tires, so I’m sure that is part of the issue. I rarely race and mainly do desert trails, and would like a little more out of the hole oomph. I assume a good clutch spring would cure this. Anyone have a suggestion? Thanks in advance.