This project started as an attempt at learning to weld. Back then I barely knew what was the difference between a 2 and a 4 stroke engine. I just got a stick welder as a gift and wanted to make something cool.

I welded up the frame, mounted an electric motor and called it a day. The result?

It was slow for my taste. The BLDC geared motor with a reductor had good torque but the max speed was meh (around 20kph).

Is that it?

A year and a half later, I found a 50cc bike for kids at a bargain price. I cleaned and fixed it, it started up just fine.

It didn’t come with a pull starter and the flywheel wanted to fly off occasionally. But it was enough to do some test fitting.

Yeah, I know. Those welds are closer to bird shit that professional welded joints. But hey, I’m applying for a “MacGyver” position, not for a welding job!

Then I quickly welded up a cage using some steel rods. This primarily serves for mounting the fuel tank, but it also protects the rider from burns and possible chain failure. You know, just in case someone’s worried about safety.

Then I installed the throttle and brake cables, and it was finally time to do a test!

The max speed ended up being about 36km/h. The tiny motor revs very high making you feel like you’re going twice as fast. The pipe gives the typical 2 stroke power/RPM curve, which makes it feel like it goes into second gear at about 3500RPM. Video coming soon!