If you can sit on the seat and stand flat footed on the ground.
Talk with a salesman, let them help determine what size dirt bike is appropriate for your. Be sure to tell them what you will be doing, play riding, racing, dual sport rides, etc. Select a model that is suitable for your skill level taking into account the bike's handling, power and size. Sit on the bike to make sure it is the right size and test ride each bike. Also, consider buying a used dirt bike.
There are different sizes for dirt bike wheels as there are for regular bike wheels.
Sit on the bike. If you’ve chosen the right size bike, your feet should just be able to touch the ground. Now, look at where you are on the sit. If you are like most beginners, you will be way too far back. A dirt bike seat has a natural indentation where the seat meets the gas tank. That is where you want your butt.
NO
there are no age limits for dirt bike. but there are recomendations for size
lose weight then buy a motor bike (Really stupid answer i know) i don't know why i put this up there.......
The size or displacement of the engine, 50cc versus 125cc.
The best dirt bike for a would be a Honda CRF 100 for a male and a CRF 70 for a girl. Of course the real size of the bike depends on the size and experience of the rider.
Two strokes can accelerate faster but it depends on engine size
a 85cc
to start of with a50cc
Dirt Bike or Street? Dirt Bike 250cc will be okay if you are beginner. It really goes by skill level. 4-Stroke motocross bike 250cc will be plenty. You will be able to jump everything. Street, you will outgrow it very quickly.