Welcome drummerkid to the forum, glad you joined us
Install instructions...
Instruction Manual - Gas Powered Bicycle Engines, Motorized Fast Bicycles, Motor Gas Engine Bicycle, Bike Conversion Engine Kits, Motor Assisted Bike Engines 80cc and 49cc, Peddle Start Motorized Bicycle Engine and more!
http://www.livefastmotors.com/pdf/two_cycle.pdf
Page Title
ZBOX MOTOR FITTING INSTRUCTIONS
http://pws.cablespeed.com/~pablomail...%20manual2.pdf
1) The 2-stroke are going to be more maintenance then the 4-stroke. The two stroke are lighter and look cool. With the 4-stroke you do not have to mix oil with fuel, but you will have to do change oil changes.
2) I like the chain drive...I've never used a friction drive so I can't really say much about it.
3) I don't know where you are from?? I don't think most states will allow MB's on the sidewalk...I don't like it anyway!
4) Well first be sure a kit will fit your bicycle. There is the center mount 2 & 4 strokes. Then you have the rear mount chain, belt, or friction drive. If a motor will not fit on your bike, your best bet is with a rear mount. Here is a link to measure your frame..
http://motorbicycling.com/f3/what-ki...mmend-510.html
Here is a list of dealers with some of there prices...
http://motorbicycling.com/f3/find-de...view-1730.html
...
http://motorbicycling.com/f4/kit-best-1764.html
Others should add there two cents