I have been noticed a lack of power for some time now so i took my bike in and found this. I have low compression due to my bilitanium hydrolic clutch decompression (add on) lever pulling on the exauste valve enough to hit the intake slightly bending both. and my exauste cam sprocket spun out of place by about a tooth and a half. no wonder i could not get this thing up hills. Was just wondering if any of you have had your cam sprockets spin on you.