There are literally dozens of companies making tuning parts for Harley-Davidson engines. But not many have the experience of S&S Cycle, the outfit set up in the 1950s by George Smith and Stanley Stankos. S&S are still at the forefront of the Harley tuner scene half a century on. And when they build a custom, they go balls-out. This Sportster, for example, has a 100 cubic inch motor, vestigial racing bodywork and a name to match: ‘Death Tracker.’ “This story begins with a dilapidated 199...