So I just bought a 1986 JS440 off craigslist and when I got it, it ran fine. I couple days later I tried to take it out but it wouldn't start. I ended up getting help from another rider who hit my starter with a hammer, which actually got it to work. I had to do this a lot so I ended up buying a new started and while I was at it I also bought spark plugs. I ran extremely well for a couple weeks until I took out the battery to charge it. After I put the battery back in and tried to start it, all I got was a clicking/humming noise from the ebox. The starter doesn't engage at all. Please help.