you don't!!
everywhere
Go to www.Zonemoto.com
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.
no pinche mamon no pinche mamon
CRAIGSLIST
U can buy one on Craigslist (used)
Lowrider bicycles come in different makes and models, and whether buying a newer or older one also affects the price. A lowrider can cost as little as $50 and as much as $400 or more. But the normal price range is in the area of $125-200.
The average price of a lowrider bike will cost about $399.99. Although it is possible to find better prices, the average will range between the 300-400 dollar mark.
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
The Oil Filter is located under the bike just behind the transmission.