10- 15
125
yes
probaly like 15 years old or more you just have to the right size to fit it
2 stroke, 10- 15 years old is a good year spand. 4 stroke, 4- 8.
As a starter bike yes, but an experienced rider will want a 125 or 250.
No, it is not okay for a 15 year old to date a 36 year old because the 15 year old is still a minor.
I would go with any 125cc 2 strokes. they will scare you a little at first but you have to learn t0 respect the bike first
No. The 15 year old is a minor and the 21 year old is an adult. It is illegal.
Made - 2002 Motocross Kaitlin 10-15 was released on: USA: 28 May 2009
A 110cc dirk bike is a fairly small and short bike. It would probably fit an older child of 10 or so, but be too big for a 15 year old. You may want to look into bigger bikes for a teenager.
The following is from one of my local motocross tracks, most local tracks should have something similar: 0-85cc 7-15 Beginner 0-85cc 14-15 years 150cc and smaller 4 Stroke, 15 years old & younger
 and any of the novice or intermediate classes depending on their ability