Well, he's 14 and it's a 160 quad. He does really well with it on trail rides around here with us. Our group usually consists of a Tracker, a Samurai, a CJ5(all running on at least 31's) and a couple of quads or dirt bikes. Our rides would be considered intermediate at least compared to what I drove through in the stock group last year, so I have no doubt he could keep up well. My main concern was if Paragon would allow him in with our group without another quad or bike to pair with him...
Of course the other logistical problem we would face would be getting both my Tracker and his quad there, while still towing them behind my ZJ so that Ms Digger has it to keep her busy while we're trail riding... I have a dolly and a 4x6 utility trailer, but not the right license for towing triples, and the quad doesn't fit into either the ZJ or the Tracker... LOL!