I'm about to buy a CRF 80 for my 9-year-old. He has an FMF pipe on his XR 70, but I've heard that they are good for little more than increased noise. How about Pro Circuit, BBR, or Big Gun? Which of those do you recommend?
Also, what's the proper bend for new bars? Mini high? Do you recommend Renthal 7/8, or something else? He's about average height.
Thanks for your help.