A 50cc dirt bike doesn't technically have a weight limit. There are many full grown adults weighing in excess of 200 pounds which own and ride dirt bikes of this engine size.
50cc dirt bike may be available at a bike specialist store, but very unlikely. Most 50cc dirt bike are seen online for purchase only. For example eBay and Amazon.
Not every 50cc mini bike goes the same speed, it various on, the engine, the suspension, the weight of the rider, etc.
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.
cobra...
no
well, who rides a 49cc dirt bike just ride a 50cc
$3.OO
About 5km/h
i wanna a 50cc dirt bike
The size or displacement of the engine, 50cc versus 125cc.
About 2.5 hp
you use the kickstart usaully