For those who have both machines, how is the power of the KLX. Just trying to get an idea. I rode a KLR250 once so I have an idea of the power it has. Does the KLX250s have a little more zip?

 

It's really comparing apples to oranges in my case.

My KLR250 has been jetted, has a Cobra pipe on it and a 14 tooth front sprocket.

I would say that the KLX250S is feeling like it has as much power as the KLR250 did. And it is stock at this time.

 

I rode both my 2005 KLR250 and new KLX250 today -- both are still new and have stock jetting and gearing -- the KLX does have more acceleration than the KLR250, and is geared a little higher for the road, too. The KLR250 will crawl along at a slower speed in first gear, than the KLX250 will, but it's not a huge difference. The KLX uses a few less revs at road cruising speeds than the KLR, but again, it's not a huge differenece -- It feels like if you went down one tooth on the KLX countershaft, or up one tooth on the KLR countershaft, then their overall gearing would be about identical.
If you made the gearing identical, though, then the KLX would show an even greater power and acceleration advantage over the KLR. The KLX is pretty fast for a street-legal 250. Since the KLX currently only has 15 miles on it, I can expect it to get even faster as it breaks-in more, obviously. And the brakes on the KLX are way better overall, too. Nice bike so far. Feels lighter and more nimble than the KLR, too.