Why do my batt terminal get realy hot when i try to start it

[Mikeinjersey]

And my batt gets hot real quick

You are not giving any useful information. How long is "quick" ? Does the starter actually crank? Will the terminal get hot even if you don't hit the starter. A shorted headlamp could possibly do the same thing. Any high current draw on the system will cause the battery to get hot including the battery itself as others have suggested. You need to do some troubleshooting to find your problem. These links may help you understand the system.

 

[dbones286]

Oh, and what Mick said, put a voltmeter on it and make sure the VR isn't over charging.

The engine didn't start terms got hot before it started

 

[dbones286]

What motor do you have?

117 s&s

 

[Mikeinjersey]

117 s&s

What bike do you have?
You should start by pulling the battery and having it load tested to make sure it's good. If you don't know for sure that the battery is not BAD you are wasting your time. You have a short either in the battery or the bike which is why it's heating up. You need to start isolating to find the issue.

 

[bdm7250]

117 s&s

Compression releases may be bad, I would eliminate the simple things first but if CR's are no good you'll struggle to turn the bike over.