Like the other members of what Harley calls its touring family, the Road King gets the new 1450cc engine, a modern engine that retains the style and tradition or earlier H-D big twins. Called the Twin Cam 88 by Harley (a.ka. Fathead), the new engine brings an additional helping of horsepower, which is most welcome in Harley's touring oriented bikes. The twin-cam configuration is less important than the revised design and manufacturing processes that the engine introduced. Those aspects of the engine design promise greater reliability, speedier assembly (which should help Harley increase total production), easier maintenance, and quieter running. Despite its all-new design, the 1450's design parameters follow the traditions of previous Harley Big Twins: air-cooling, overhead valves operated by pushrods and hydraulic lifters, a 45-degree cylinder angle, with a single carburetor supplying mixture from the middle of the V, dry sump, and chain primary drive on the left side running to a separate (and also new) transmission case. The tranny uses the same shafts inside the new case though. Since adopting them over two decades ago, Harley raised our expectations for toothed belts as final-drive mediums, and the Fatheads all use them.