Engine & Performance for 2020 Harley-Davidson FLHR Road King

Engine & Performance for the 2020 Harley-Davidson FLHR Road King

The 2020 Harley-Davidson FLHR Road King features Engine: Milwaukee-Eight 107 V-Twin, Displacement: 1,746cc (107 cu in), Cooling: Air-cooled with oil-cooled cylinder heads. This trim includes Chrome Styling — Extensive chrome on the engine, exhaust, front forks, and headlamp nacelle.; Milwaukee-Eight 107 — Standard engine is the 107ci, whereas the Road King Special (FLHRXS) features the 114ci.. Owner note: The high-compression M8 engine requires a strong battery (typically 300+ CCA). Parasitic draw from the security system can drain the battery if not kept on a tender. Learn more about this ride →