Engine & Performance for 2018 Harley-Davidson FLHR Road King

Engine & Performance for the 2018 Harley-Davidson FLHR Road King

The 2018 Harley-Davidson FLHR Road King features Engine: Milwaukee-Eight 107 V-Twin, 8-Valve, Displacement: 1,746 cc (107 cu in), Cooling: Air/Oil Cooled. This trim includes Chrome Finishes — Extensive chrome on the engine covers, exhaust, and headlight nacelle.. Owner note: The M8 engine has high compression; a weak battery will struggle with cold starts or cause 'kickback' that damages the starter drive. Known concern: Oil Sumping — Addressed in TSB M-1450; the permanent fix is installing the 2020+ redesigned oil pump.. Learn more about this ride →