It's not the best but, pretty solid game. Mainly Hop contests and customizing and is modular, hey it's free and is also online. So if you're po' like me and want to dump sum switches, this might work for you.
http://www.thelowridergame.com/index.php just register an account, download unity player and you are ready to roll. hit me up if you want, look for Dillon and the same icon.

P.S. play while listening to your favorite cruising songs or else it gets a lil' boring listening to just hydraulics.