Welcome to the forum. I don't have any recommendation on an odometer other than if you are only installing one for keeping track of how far you have gone in a given ride, I would take the money and buy a Garmin GPS and a RAM mount and install an ATV trail map available online. You can plug the GPS into DC power and it will give you all the information you could ask for. Now if you want to keep a running total, thats a different story. Heat cycle the motor a couple of times, then go out and ride it. Don't baby it.