Even when the increasingly dated Evolution engine provided the power, Harley’s Fat Boy was the best-selling motorcycle in America, though it wasn’t very popular with our testers after last year’s big twin cruise-off. This year Harley reinvented its Softail series—those models concealed rear suspension and solidly mounted engines. H-D started with the engines used in the Dyna and Touring series bikes, such as the FXD included in this comparison. For 1999, the company introduced an entirely new big twin, even though it followed the basic format of the old Evo engines with air-cooling, a 45-degree V angle, a single carb, overhead valves operated by pushrods and hydraulic lifters, a single crankpin using a “knife-and-fork” connecting rod arrangement and a separate transmission case. Displacing 1450cc (instead of the Evo’s 1340), the new Twin Cam 88 engine not only made substantially better power, but also brought modern design, materials and manufacturing techniques to the venerable 45-degree V-twin. The new engine brought beefier and stronger components, more compression, tighter tolerances, better bearings and improved lubrication. Overnight, those bikes with the new motors, Harley’s Dynas and tourers, achieved power parity and even supremacy over other big twins—despite their displacement disadvantage. The engines were mechanically quieter and generally seem to have provided the improved reliability and reduced maintenance that the modern design promised.