This is the first and worst build I did. Mainly because it was made it China. This is the second build I did. It is a Staton Gearbox connected to Sick Bike Parts Freewheel Cranks This is my third build. It is a Thats Dax Friction Drive connected to a Harbor Freight 52cc Waterpump Engine. This is my Fourth Build. It is a DIY Scooterguy mount with a Honda GX35 engine. This is my fifth build. It is a GEBE kit with 105G wheel and a Tanaka PF4000 I got out of motorized bicycles and then got a Honda Ruckus I couldn't keep up with traffic with the Honda Ruckus so I got a Yamaha Zuma 125 which I still have Now I don't feel as safe on the Yamaha Zuma 125 as I did when I was on a motorized bicycle on the sidewalks. So I'm building my dream bike. An Electra Townie 21D with a GEBE kit velocity 105g wheel and a Robin Subaru EH035 engine. Hope you can learn from my experiences.