thanks guys I have been wanting to do a MB for two years but never could pick a bike yet . I am set on a 4 stroke so im better off going for an easy first build .
A four stroke internal combustion engine it is then!
There's plenty of bikes in that price range. My bike is a Schwinn Del Mar, and I've been happy with it other than it's slightly small for me (6'1"). Check out Micargi, they have some good stuff. If you can add a couple bucks, and wait for one, buy a used Worksman.
After riding for a while, I really wish I had a Worksman, or custom ground-up built bike. It doesn't take long to get comfortable enough to ride it pretty fast, and you gotta keep in mind your foundation
There are lot's of threads here on bikes- "Pre-Motorized Bicycle Information" is your money section.