Well I took my bike out for a ride this weekend and all was well for a while. Then as I was riding I noticed the bike began to ride funny, I had just installed a new plug, but the bike would rev on its own almost like if you have the bike running and don't have the gas on for some reason and it begins to get too much air. It would rev without me touching the throttle. I was wondering if this was a carb problem (fuel lines are OK and not clogged), or maybe an overheat problem. Any ideas anyone????