When I got mine it made the valve noise but I to figured an adjustment would fix the problem. I was very wrong. The cam and rockers were so worn that even after being adjusted properly there was still way to much slack and they made lots of noise. I replaced the rockers and cover and cam with stuff from an xr and it is much quiter but still makes a lot of noise epecially at higher rpms. I am not sure if that is normal or not. I did take the cam chain tensionor off the bike cause I dropped the pin that holds the compresion realease lever in the cover. It fell down the hole the cam chain goes thru. I got it but was very worried I was gonna lose it so be carefull. The tensionor was a pain to put back in and I dont know that I did it right I may have a loose chain.

Mine only had 3400 miles on it to.