Kawasaki Mule 4010 Faster?

I just bought a Fuel-Injected brand new Kawasaki Mule 4010 and it has 2 hours on it. I want it to go faster than 25mph. I want to know how to tune the ELectronic Control Unit (ECU) to make it go faster. I know it will void the warranty, and I don't care. Also if there are any more inexpensive mods to make it faster I would like to know