I think it says on the side. You could research your dirt bike and then you could probably figure out what size it is. You could also see what brand it is.. Honda, Yamaha, Suzuki, etc. Then you could get more information on it and it would lead you to the answer.
The biggest and most expensive one you can find!
There are different sizes for dirt bike wheels as there are for regular bike wheels.
Yeah if they have the right size dirt bike and gear
where can I find a free diagram of dirt bike parts
NO
there are no age limits for dirt bike. but there are recomendations for size
u can noramlly find out by looking at the vin # then searching it on a dirt bike site.
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