Dirt bike (motocross) game engine using AndEngine and Box2D

I'm making a motocross Android game and I need a good dirt bike simulation in AndEngine using Box2D. Not all game, just behaved realistic bike. It should behave like for example in this game: [login to view URL] I can send you my source code (not working properly; I have problems with vehicle boucing, bad joints etc.). Bike should ride, brake and respond to left/right keys (ride on one wheel/move the center of gravity). I don't want you to make levels, graphic, menus etc. All I need is a BIKE in Box2D and AndEngine.