To me i like 110ccs but it differs around how tall and big you are
KDX 200 dirt bike has Seat height: 36.2"
It depend on bike different bike have different height. But 36" At Handlebars - 24" At Seat is the approximate height of any bike.
The height of a 50cc dirt bike would depend on the year, the make, and the model. However, they average about 30 inches at the handlebars.
at the waist of average height man normally.
when you sit on the bike, you should be able to touch the ground with your toes.
For a 13 year old it depends on your size and your experience with dirt bikes, but an 85 is usually the best size bike and fastest for a 13 year old. Unless you are really tall which you would need a 125.
Im 6'1 and 240lb i have an 03 crf450 and it rips
seat height is 39 inches of the ground
you would need about a 125cc 2 stroke
depends on how tall and what your weight is. if your average or a bit above it for your age, a HONDA XR100 will do nicely.
tell them why you love this sport and if your tall get an 85cc or 125cc