Bigair, I find this post quite interesting... Guess we wore you down, or maybe the 250F did? Anyways, my 07 250XCW was pretty grunty. As far as turning, uh, duh, LOL. I think we've told you the 2 strokes will turn circles around the 4 stroke. Ha ha. I don't think you need the head done quite yet. Ride it, and see how you like it. You also need to get the handlebar switch for the ignition. It is very feelable. So you will notice a change if you really know bikes, one is great for comparison to a 4 stroke, and the other lets you do more of a 2 stroke style. All while on the fly. The guy I sold mine too, just happened to come in my office on Monday and praise how much he loves it. Has sold off his 4 strokes now. If you are gonna do work on the motor, I'd say wait and just go to the 300 cylinder and MikeS head when you are ready.