So I hear a lot about Not using walmart bikes and I was wondering what kind of bikes
any of you guys recommend ?
Let me put it this way...
A bike that fits YOU just right and comfortable for YOU to ride as fast as you can is where you start.
And you need brakes front and rear, no exceptions as no motorized bike is safe without at least 2 brakes.
A $95 Huffy bicycle is a kids toy regardless of where it is sold, and you really don't want to start with a toy to build an adult motor machine.
Sadly, the first thing that usually goes bad is the back hub and coaster brake, the only brake it has.
I built a lot on the ~$220 26" Micargi Pantera 7S beach cruiser bike.
$25 at
http://sickbikeparts.com for a small front engine mount and dual pull brake lever and you're set.
The direct drive engine sprocket aligns right up with the 7-speed hub and the 2.28" tires are about as wide as you can go for good chain clearance, and even then you have to cut the rear fender on the chain path but overall they have proved to be a reliable safe platform for both 2-stroke and 4-stroke engines direct drive, and shifters for 5 years now.