Part 1: Rare Yamaha CA50 that will endure an engine and fork swap, a liquid cooling conversion and will get yelled and cursed at a lot. Also, the OG TST Video, Part 2: Engine is coming out. Part 3: New engine mount has to get figured out, as the bike is from 1982, a simple bolt on did not work out. With some liquid persuasion though, it ended up “alright”. Part 4: A long time later, the CA is back and it is sillier than ever. Part 5: It is time to build the 70cc engine for our CA50 project.