ok, rode sunday, no problem. started bike today crazy sound-sounded like pistons hitting the top of the engine(ping,ping), like no oil in the bike. my friend said do not ride. found 2 rmz guys, the 1st guy had no idea, the 2nd said my valves needed adjusted, and while they were in there check the noise. 05 rmz not a year old, maybe 20-25 hrs, i drop the oil every 2-3 rides, adjusted the cam-chain with no problems, and lets face it i am not that fast. could the valves make that type of noise? what should it cost? i have the horrible luck. please help!