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

Engine Configuration Two-Stroke Single Cylinder; Air-Cooled Engine Displacement 49.6cc (3.03 cu-in) The humble 50cc single Harley engine was utilized in two unique offerings. The first ...

Riding it is a breeze, thanks to the 50cc engine that offers just the right ... Yamaha’s funky race replica two-stroke scooter is nippy, agile and lots of fun, although the single seat limits ...