My sister is 13 years old, and is around 4'11" or so. We have a PW80 that we got kinda for her and my little bro to share, but she's too big for it now. Me and my dad have been trying to think of something to get her, because she seems interested and actually rides pretty fast for somebody without much experience. I was kinda thinking of maybe an XR 100. What do you think? Any help is greatly appreciated.