2017 Harley-Davidson FLS - Softail Slim, 2017 Harley-Davidson® Softail Slim® The perfect blend of classic, raw bobber style and the power of a High Output Twin Cam 103B engine. A modern ride with unmistakable old-iron attitude. The good old days are right now. The Softail Slim® brings old-school style into a new era. The Hollywood bars, slim rear wheel, cat eye console and foot boards recall the early days of custom motorcycles. Yet, you also get thoroughly modern features like a High Output Twin Cam 103B engine, hidden suspension and ABS brakes which make the Softail Slim motorcycle a modern classic.