It’s an Open Source Two-Stroke Diesel Engine that’s easy for anyone to ... he’s scaling the design down to a 50cc motor with the intent of scaling the design up to 125cc and 250cc.

Both bikes feature 49cc liquid-cooled two-stroke engines with 6-speed transmissions and chain drive. Perhaps one of the ...

Built as a trail bike that works well in busy cities, Chappy sits low on tiny wheels, has a 50cc two-stroke engine, and zips through and around anything with ease. This bike straddled the line ...