So a while back I bought two Yamahoppers for ten bucks. Had one of them running the same day I got them. The carb and tank were filthy. A good cleaning and it was good to go. So the other one is not sparking. I really don't know crap about the ignition system on these little dudes. It should be pretty easy to find the faulty part, since I have one right next to it that runs, but I really don't even know where to start. Any ideas?