You should use knee pads,elbo pads,helmet,gloves,and shin pads. If you want the jumps bigger you could tell the person who owns the track to make them bigger for you. If he wants money for it. Try giving him 10 dollars if you want the jumps 3 feet. If you want the jumps 4 feet give him 18 dollars. If you want it higher tell the person who owns the track to make them higher. If the person who owns the track wants more money to make the jumps higher tell the person how much money he wants. On the track you can mountain bike. Good luck. Bye.