Okay so the Destral Cycle is powered by sound, which probably means that once it gets going it uses its own noise as fuel, and that sounds really efficient and green and cool and all but

How do you start it? It must need some kind of external sound to start, right?

Do you just sit on it and scream for a minute to start the engine?

Imagine Antroz climbing onto this thing, about to ride it into battle, and just going “AAAAAAAAAHHH okay it’s running let’s go”

Or if he got it back from the shop and found out the mechanics reduced the noise it made, so it crawls along at a snail's pace unless he screams constantly.

Makuta Antroz coming down the road on a motorcycle screaming his gaseous lungs out, that would be equal parts hilarious and terrifying.