I'm looking at a 80 CX500D. The owner has said it needs a stator. She says shes a mechanic and has done tests for why it has no spark. It's definitely been a while since I was involved with motorcycle troubleshooting (30+ years) but, isn't a stator like an alternator on a car? It just charges the battery right? As long as it's connected to a good battery won't it run without the stator working?