I would say that you just fix it up with everything is needs, sell it for a good price and then buy a new bike from your local bicycle store they should have a number of bmx bikes. When buying a new bike you should make sure that it comes with a three-piece they know what is. If it doesn't come with a three-piece then you should look for a nother bike with it because if you don't buy it with a bike it, you will need to buy it later on and that ranges to 150-300$ each if you want a good one. I would say that you buy a FELT or GIANT your choice.