Ihave been a bike rider since i was a kid but this is my first foray into engines i have a few qeustions first i have a univega muontain bike its about 7or 8 years old its a 18 speed what if any would be a good starter moter .Second i would really like to either build or find a nice racked out chopper nothing major at first i am pretty good with tools so building wouldn't be a problem any ideas sorry about the grammer