I posted a topic a few days ago about my bike backfiring and running like it was fouling a plug after a couple hours of riding. Since I was riding at slow speeds and down long hills (keeping throttle closed to let engine brake) before it began to backfire, I assumed I was fouling a plug. I made it back to my truck after having to use the hot start to crank the bike (first time that I've ever had to use it). But after changing the plug, I didn't get very far before it died again (backfiring as I let off throttle). I am going to take the advice of you who replied to that post and clean the carb (am removing octopus so might as well). But a friend of mine is insisting that I have a bad coil or CDI. Would these symptoms be consistent with that problem? Any easy way to check them out?