So I’m thinking about buying an engine (hope the link works):

For my moped project. It looks dirty and dented on the outside, but I’ve heard that’s hardly a sign of what the inside is like, plus new ones cost more than I can afford.

My question is, what should I ask the seller about? All the listing says is it has compression.

It’s my first project as a whole so I’m generally clueless about this stuff. Thanks

(old 5-series for your trouble c:)