Hard to know for sure as you have not shared the type of cart. It is an 02 and it coasts and goes 25, so I could guess that it is a Club Car series cart. There are alot of them in TV, I have two.
If it is then I suspect whoever rebuilt it put in a high speed motor to help it get up hills and be a bit peppier.
If it is the type of cart I am assuming it is, then it does not have the ability to measure the speed of the motor in the controller and cap it at a certain 'speed', like some carts do.
It actually sounds like a fun project, but I suspect you would need a new controller and motor, if it could be done at all, but I could be wrong.
I have always been interested to build a cart that goes 40 that with a flip of the switch or click of a remote will only go 20, so if you figure it out let me know
