The list gets quite long when you talk about what's different from past or present Harleys. In fact, most of the bike is unlike other cruisers. The new motor is light-years away from the present generation of air-cooled, 45-degree pushrod Harley engines. The aptly named Revolution engine is a 60-degree, liquid-cooled, double-overhead-cam, four-valve-per-cylinder V-twin laid out like the VR1000 race engine, but sharing none of its parts. It is a short-stroke (72mm stroke in a 100mm bore) with the cylinders an integral part of the crankcase. The camshafts are chain-driven, with long followers for the automatic tensioners. Valve lash is adjusted with shims-under-buckets. The design is unit-construction with a wet sump and geared primary drive. It displaces a mere 1130cc, but is redlined at 9000 rpm, and claims a stunning 115 horsepower, much more than any other H-D street engine. The connecting rods are side-by-side, and a gear-driven counterbalancer, backed up by rubber mounts, snubs any shaking. This is the first Harley streetbike with a radiator, and it is encased in a large shroud with a raft of high-tech air-management features. The engine is fuel injected, with an all-new two-throat downdraft system. The five-speed transmission uses helical gears for the middle three ratios to reduce noise. In short, this engine is as modern as anything on the road and certainly as modern as any cruiser engine.