Well here it is. I got this Bike from my neighbor a couple of months ago and found this forum about the same time. So I told my wife I wanted the engine kit for my birthday. I ordered it eleven days ago and it got here yesterday! I thought it would be an easy build. I was wrong! I have a Trek Drift single speed. I ordered a ZB Limited Edition Silver 80cc from Zoom. So after figuring out i had to open up the diameter of the sprocket, and after installing the sprocket 4 times, I got it. Several trips to the hardware store for new bolts, zip ties, and wire to extend the kill switch because of my handle bars and a some tweaking on the chain tensioner due to the shape of the frame I finished it today. I have rode it twice so far. I wanted to post some pics for you guys to check it out and let me know what you think. I want to thank everyone that has ever posted tips and their issues, that's how I figured most of my issues out.