i think its the valves too, but i dont think its time for rebuild, the bike never gets ran, and the guy who owned it before me him and his wife rode she had a warrior and when i saw it the warrior was brand new wasnt even dirty and he wasnt the type who would have a lot of time on his hands to ride. idk ill check the valves tomorrow, if thats not it im taking it to motor world and trading it in on a 07 R6