Ok, so I picked up a 2000 XR250 about three months ago and was just recently riding with a dude on a XR400 and a dude on a CRF450. Needless to say, the guy on the 450 was smoking us and the guy on the 400 I could at least keep up with with minimal stop and waits. But riding with those guys made me realize that my little 250 sounds like a moped compared to their bikes. I have the snorkle removed and altered the spark arrestor to where all that it consists of is the plate at the end of the pipe. the rest of it was cut off with the handy ol' porta band. I had the spark arrestor pulled all of the way, It seemed as if lack of back pressure was not mixing well with my current "stock" carb. adjustments. This week I am going out to get a k&n filter for it and was wondering if I could just re-adjust my air/fuel ratio or will I have to go out and get new jet(s)? I know, I know...some of you are probably saying to get a 400, but I like how light and agile the 250 is in the woods and also how quickly it is able to adjust to a constantly transitioning enviornment...besides I haven't quite finished paying it off yet, so I would never be able to justify it with the wife. Has anyone installed the stage 1 hotcam in their XR250? I read that the only adjustments that are needed are that rejetting of the carb. The kit says that you don't need to do any head work for this particular cam. if anybody has installed this cam in their XR250, could you give me some feedback on what mods have been performed and what the outcome has been so far? Thanks!!