Hi everyone! been enjoying all the threads while i build my first motorized bike. i had envisioned and constructed a powered bicycle like this in my mind since i was 8 years old. The visioned faded when i turned 16 and got a car. then, w/gas prices on the rise and approaching 35 years old, i started thinking about a scooter or moped for my 8-mile commute to work. Began researching and happened across some of these (your) projects on youtube and the info on this msg board. after some thought, i purchased a 70cc kit on ebay from boygofast and began planning installation on a schwinn mountain bike turned commuter (s9[five].3 w/1.5 city tires, rigid fork, and surly singleator). The most challenging part of the build for me was mounting the engine (aluminum tubing on the schwinn is too large for the stock mounts). i ended up using muffler brackets from Autozone (2.25 in.) and large radiator hose to protect the tubing. since this is a borrowed frame (from my brother - thanks andy!) - i've mounted everything so as not to scratch or harm the frame in any way using the radiator hose and bicycle inner-tube to mount the motor, gas tank, cdi box, and chain tensioner. been riding around the neighborhood w/a smile on my face for a couple days - thanks for all the info - there's a great community here!