The more I read your posts... the more I really do believe that the RM85L or YZ85 bigwheel equivalent, is going to fit the bill... addressing a few key points you made; I agree with you on the Freeride... maybe that is an option in a couple years (@ 14 maybe) when he has grown a bit more... still perhaps not looking for a full sized bike... or maybe swaying towards the trailbike/fun bike aspect, if not want to pursue the mx/bike park theme. Realistically, the AG bike idea is for the farm... spot on. Soumds as though he has some skills... inline skates and skatepark bowls... he obviously has an eye for lines and jumps... that stuff requires timing and balance... and practice. Use that theme to your (both) advantage in future, when you take the new bike to the mx park then... Instead of just pointing him out to the track and let him cut laps endlessly... break the track down into some specific sections. Focus on some riding drills... eg. braking, cornering... specific jumps etc. Just like he does at a skate park - work on the individual components of a line or a turn or jump... then when he has the individual components worked out... link them up (like a skate sequence) and THEN let him cut some laps. You will see the difference - improvements immediately. I really admire what you are doing Cuttlefish... and regards his shyness etc. I am certain these type of activities (together) will benefit you both... He will make friends, develop life skills and you will strengthen that father/son bond that already exists. Good luck with the new bike hunt. Keep us updated when the young bloke gets his new pride and joy. Thanks.