at lowriders.com
invest alot of money in a dh bike and buy a motocross helmet. develop an affinity for xxl clothes and then lose your sense of fear.
you don't!!
Go to www.Zonemoto.com
You can purchase inexpensive motocross helmets from a number of retailers including Discount Ramps, Motorcycle Superstore, Motorcycle Closeouts and MX Megastore.
Probably the easiest way to buy a cheap bike is to look for one at local garage sales or flea markets. There is also several websites where cheap bikes can be found, for example eBay.
CRAIGSLIST
U can buy one on Craigslist (used)
The Kawasaki Kx 85cc is a newer model of modern motorcycle and off road vehicle and can be bought at many Kawasaki licensed motor vehicle dealerships.
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
you can buy a real shop repair book on your bike from bike shop or on line, the same one the bike shop uses.its not cheap but tells everthing
www.racksbike.us Perfect for buying bike racks. Its also with Amazon if you buy stuff there alot. If that doesn't help then go to Amazon. Bike racks there are cheap.