Just picked up an XR80 that was sitting for about a year. The guy said his kid put it away and didn't ride it and he tried to start it and it wouldn't start. I took out the plug, clean it up and the thing started right up. It ran real rough so I put in a new plug. After the new plug, it still didn't run right so I drained the gas and checked the air cleaner which looks good. Filled it up with new gas and it doesn't want to go at full throttle. I took the bottom of the carb off and cleaned it up. It didn't look too bad but it did have some gunk. The thing runs great but bogs out at full throttle and will slow to a stall if you keep the throttle open. Any ideas?? Should I take off the carb and clean the whole thing?? I checked the plug gap and tried running it with the air cleaner off just in case it was clogged. Still no good.