If you're not shooting for perfectionism and won't bother to enforce a spar parts ban, then why propose a spare parts ban in the first place? Just ban the prod

If you're not shooting for perfectionism and won't bother to enforce a spar parts ban, then why propose a spare parts ban in the first place? Just ban the production/sale of new two-stroke machines, not the spare parts. As old machines wear the cost and effort of keeping them in service will eventually exceed the activation energy for buying a new machine. An unenforced ban of spare parts would accomplish nothing productive; it would waste your political capital and train a new group of people to have contemptuous disregard for laws. With respect to the antique analogy, you have it completely backwards. Antiques are things which have outlasted their practical usefulness but are kept around anyway because people have some nostalgic or aesthetic affinity for them. Machine guns fall into this category; they are essentially fetishes (in the traditional nonsexual sense of the word). Virtually nobody is earning their living with machine guns. Two stroke motors on the other hand are in active use by thousands if not millions of people to earn a living. If they were in fact antiques, then they wouldn't be a problem in the first place because antiques aren't put to use. If you banned new production of two-stroke machines, the ones that already exist would gradually become antiques despite the existence of legal spare parts, and eventually the only people keeping them in running order would be the antique geeks who own it because they like it, not because they earn a living with it. The people who are actively earning a living with two stroke motors today are the people you [should] have a gripe with, the lawn care guys who run two-stroke leaf blowers in your neighborhood aren't antique collectors doing it for fun, they're guys trying to feed their children.