I personally know of a couple over 50,000 and have heard of a couple more over 100,000. Haven't heard of any hitting 200,000 yet, and I too am talking miles not kilometers. Hard to believe am air cooled twin can achieve such mileage but they do. As Greybeard says must be in the modern alloys. Heck of a lot more than we used to get out of the old top ends.
