Forget your Harleys and your Vespas and your Lambrettas, my money is on the Honda C50 cub as being the greatest motorbike ever made. They pull 65k easily on the flat, you could fix everything on them yourself in half an hour with only three tools, no one ever stole them, and you could happily store them for the winter by throwing them in the river knowing that come summer you could pull them out and they would start first kick.  The seats were always ripped and the odometers always read 999,999 because the C50 was so awesome it would go forever. In fact if you never want to see a mechanic again all you need is a 1970 Honda C50 and a 1978 Datsun 1200 stationwagon. I’m totally going to get another one.