How does this work?

Hi i’m a complete beginner when it comes to building cafe racers and i am just to buy my first project bike. I have looked at a lot of videos and pictures of peoples builds. This one caught my eye and intrigued me: moped video this is made from a tomos revival and it is the coolest 50cc i’ve ever seen, can anyone tell me how he’s done this and how i can try something like this. via /r/CafeRacers https://www.reddit.com/r/CafeRacers/comments/9cbqor/how_does_this_work/?utm_source=ifttt