Ok. Updating about bike running bad, backfiring, plug getting carbon on it. I changed the gas and put Seafoam in tank. I adjusted the valves. The intake was tight and the exhaust loose. I changed the plug and adjusted the air/fuel screw. The choke seems to work fine and the intake boot does not have any holes in it. The bike was running good. seemed to even have better get up and go. We figured the valves was the problem. So we put the air/fuel screw back to where the manual says it should be. The next day it started running bad again. So i adjusted the air/fuel again. But i didn't get to run it long before I left camp to go home. Also i cleaned the plug, it had carbon on it again. It ran good for little while ran. While working on bike, started wondering if maybe a electrical problem. I tried running it and disconnecting the positive battery terminal. The bike killed. I can do this on my 2002 Honda and it keeps running. Can this be a electrical problem? Or this just another problem?