I was riding along on my '78 Maxi today, it's currently running a 70cc Airsal, a pipe, and an upjetted stock carb. Well, the rubber fitting on my LeoVince pipe was coming loose, so I stopped to fasten it, and when I killed the engine, as it died, there was a "pop" noise. It wasn't extremely loud. I thought nothing of it, but then when I tried to start up to get back on the road, it wouldn't even turn over. This pretty much narrowed it down to an electrical issue, because the piston was still moving up and down; there wasn't a seize. I thought the plug was fouled, but it was pulled and replaced, to no avail. Did my coil go bad, or what? I don't have access to the garage right now but I need an outside opinion.