Hi c3lin3y
The handles are not adjustable. For the bike, what my son does is he sits further to the back.
The scooter is in a very good condition as it is hardly used. I would say 8 or 9. As for the bike, the screw on the front wheel is a little loose but it is easy to push it back in. We may have a spare screw somewhere in the house. Let me know if you are interested and we will look for it.
Thanks.