my bike began acting strange last weekend but i didnt think anything of it until i rode yesterday. it won't really rev out, it seems to hit the rev limiter early, but it doesnt make the same quick rev limiter bang like normal. it almost sounds like a 2 stroke w/ a smoked top end. ive got 70 hrs on it and did a top end about 20 hours ago along w/ valve adjustment. the weird thing ive found is that it appears to be getting harder to kick, like its gaining compression. once it's started it seems to run fine other then the top end power kind of falling off. i haven't gotten into it yet, but anyone have an idea what might be going on?