Thanks. A few weeks ago my BME began to run very rough with a slight backfire. Assuming that I had a bad plug I landed and changed plugs. Long story short I ended up pulling off the carb to find that one of my reeds were broke. Thinking I found the problem, I ordered and installed new reeds. Today I tried to start it up and the backfiring was still there. I am figuring that whatever caused the backfire is what broke the reeds in the first place? Anyhow, I will start by sending in the ignition.