I hadn't seen Fred's guide yet, that's helpful. I've been hankering to disassemble it and check on some of those things (gaskets, good cleaning of the carb, exhaust etc.), but obviously a little nervous to start. I was happy enough that it ran when I bought it (my friends wasn't as lucky with his 50 series), but I guess I'll have to bite the bullet eventually.
And I do speak french, but unfortunately I'm not really on Facebook or Instagram. Maybe I'll reach out to them on here and see if they reply. Thanks again!