How old do you have to be to ride a gas pocket rocket bike?

As long as you don't ride on the street, you use proper safety gear, it's ok with your parents, and you can walk you can start riding any time you can get a bike and a place to ride. Just ask your neighbors first before you ride on their property. Make sure you use proper safety gear (a helmet is a good start) and make sure you can operate the bike safely before you ride.