Hello everyone,

I have a 1988 Yamaha Moto-4. I purchased a new battery for it, charged it, put it on the bike, turned the key and nothing. The neutral light doesn't come on, the headlights do not come on. I have no idea.

I confirmed the battery was okay by having a neighbor check it with a voltage meter. The red switch on the handle bars isn't the issue either. Also the four wheeler isn't stuck in gear as far as I know. It rolls forwards and backwards just fine.

The battery cables don't look damaged in anyway, maybe a little bit of surface rust but nothing to keep them from getting a connection to the battery.

I don't even know where to begin to solve this issue, if anyone has an idea please let me know.

Thank you!

 

At first I thought it might be the Neutral Switch or its wire, but with no headlights, it's most likely the main fuse or a bad connection / dirty ground. The main fuse is in the positive wire coming from the battery

 

Thank you for the information, as soon as i'm back from hunting tomorrow I will take a look at it. I guess if the fuse is blown it'll look like a blown car fuse?

 

Let us know what you find out. This most certainly sounds like it could be a fuse issue. Keep in mind as well that it doesn't take too much corrosion on wiring to cause issues.

 

No neutral light is a big clue. First thing you need to do is track down a service manual for that bike. it gives you electrical diagrams, fuel issues, and mechanical repairs. Without it you'll be pulling your hair. I have a 88 YFP350U and without a service manual, I'd be lost. It's saved my hide several times and worth the investment. Sometimes you can find one on CD of fleabay at a decent price. well worth the money. Good luck.