Since I am new here and have never built a motorized bicycle. I was wondering how someone would put a motor mount on an oval frame. THe bike I want to put a motor on is this one http://www.walmart.com/ip/26-Roadmaster-Granite-Peak-Men-s-Mountain-Bike-Black/42248076 how would someone go about mounting a motor mount on this bike if it has an oval downtube? All ideas and any past experience will be appreciated.