Go to www.Zonemoto.com
you don't!!
CRAIGSLIST
you could buy a cheap second hand bike, or a Chinese mini dirt bike for no more than £600. but if you go for quality Japanese bikes you will pay a little over £1000. http://www.dirtbikefanatic.com/cheap-dirt-bikes.HTML
To make an electric dirt bike go faster it is simplest to buy a motor that can support a bigger battery and then get a bigger battery. Now you should lighten it. Also, don't be cheap, buy a dirt bike with a gasoline or diesel engine.
Snowboard because its better than a dirt bike.
Buy a USED 250 dirt bike.
For a 2-stroke dirt bike all you have to do is, buy a taller cylinder, and buy a longer crankshaft.
Not usually. Some dealers will give you a helmet when you buy a bike, but nothing else.
One can buy a mini dirt bike from the local bike stores. Sometimes local community auctions also feature variety of mini dirt bikes for very reasonable price.
Auto Zone
Ebay, Craigslist, a dealership
buy a Giovanni kit bike and follow the instructions