The Only Harley Engine I'd Trust Past 100,000 Miles

Every number in this video, its source, and a worksheet to run the tally on your own bike are in the Harley Doctor handbook: https://harleydoctor.shop In the 1970s, buying a Harley meant buying a second hobby, and that hobby was keeping the first one running. The bikes leaked oil onto garage floors, the wiring gave out, and owners learned to carry tools the way other riders carried lunch. For years, that was just what the brand meant to a lot of people. But in 1984 a single engine ended that reputation. Forty years later it is still the only Harley I would trust to cross one hundred thousand miles without asking me for a rebuild. So which engine was it, and why does a design this old still outlast the ones built to replace it? New here? Subscribe for straight, no-upsell ownership math, one video at a time:    / @harleydoctor