I don't see the difference, a faulty part will be a faulty part whether it's installed on a new vehicle at a factory or on a 30 year old vehicle during a restoration. I would rather (clearly) go with the new option. Aren't a lot of "restored" Vespas getting LML motors anyway? I will admit I expected a little more speed, but I never planned on taking it on the highway anyway so it's fine for my needs anyway. Whether it tops out at 50 or 60 at this point is really irrelevant when I never need more than 45 on any surface streets, I think the highest speed limit is 35 or 40. It's not a race car, but it'll take any roads and hills that I require with the meek pick up of the standard econobox. I really want to put a Sito+ on it but I'm not ready to start screwing around with it. I think that would open it up nicely. My gas gauge works intermittently, it's finicky usually in the morning, I think it's the dampness that it doesn't like, must clean connector on sender. On mornings that it doesn't work, it usually works again by lunch. I know many might argue that a bike with 1000 miles shouldn't be showing signs like this, but it's a 35ish year old design. This is what I mean by restored vs new, this could happen on either one.