Not sure what is going on? I was driving home from work and all the sudden on acceleration the engine would sputter/huff/slip. Doesn't do it on deceleration and I thought it was was the engine, so I went to nuetral and reved the engine and the engine revs fine. I thought it was 1st gear but found that it was jump/sputter as long as I was accelerating to 4-5k rpm in any gear. If I keep it at 2-3k it seems to run normal. I'm freaking out a little bit, I don't have much experience with bikes. Is this a clutch thing?