I've had it 3 years. I don't know of any motor work being done to it

 

Ok, so it does crank over but just slow. Is that correct?

 

That's correct

 

Did you try to put a battery charger on it and put it up to cranking amps and see what it does then?

 

No I haven't

 

Give that a try because if it does increase your cranking speed then it could only be three possible issues.
1) weak battery. just doesn't have the current to drive the starter. you can take it to like autozone and they can load test it for you.
2) A measurable voltage drop on you cable going from the battery to the starter.
3) The starter itself is getting to the point where it drawing to much current and will not spin as fast.

Those are the only possibilities I can forward you. The first thing I would do is load test the battery.

Also with a volt meter check battery voltage then check the voltage at the starter terminal. If you have more than a 10% difference than the cable will need replacement.

other than those two if they pass I would say the starter....

 

Alright I will try that. I'm thinking the battery is getting g weak it is 3 years old

 

Could be. I've never had a battery go that quick. I have used OEM's mainly and never an issue. usually 7 years.... Check the sticky for charging systems as well. It will guide you to the correct way to determine if it's putting out what it should be.. right here in the EVO section "How To Diagnose Your Charging System"

 

Alright thanks for the help

 

There is a big difference between just a click and the motor cranking over slowly.

If the motor is spinning over slowly I agree that it is probably the battery.