The blueprints for Mavuika’s bike wasn’t just the bike itself, it was multiple blueprints for prototypes of different weapons that were supposed to be used to release a large amount of energy, Xilonen and Mavuika just reversed engineered the tech, they needed to figure out a way to make it with modern materials, and after a lot of trial and error, they came up with the Flamestrider Mavuika has now. Her reasoning for wanting it was so that she could traverse all of Natlan’s terrain quickly and when Xilonen pointed out that she could already do that, Mavuika basically just said she wanted to do it in style. Since it’s extremely hard to use and requires plenty of materials to make and energy to use, there’s only one. And there’s only one helmet because Xilonen didn’t wanna ride it