The new HOREX – Sovereign power from a VR6
An exceptional motorcycle demands an exceptional engine. The new Horex delivers smooth acceleration powered by a 1200 cc VR six-cylinder engine. Thus, the new HOREX offers a remarkably wide engine speed range combined with impressive power well below the redline. Thanks to the VR cylinder layout this powerhouse is extremely compact measuring a mere 429 mm width at the cylinder head. This makes the VR6 as narrow and compact as most four-cylinder motorcycle engines.
The radically new design of the new HOREX six-cylinder VR engine represents a milestone in modern motorcycle engineering. The patented HOREX VR6 developed specifically for two-wheel vehicles is currently the world's only motorcycle engine that uses this space-saving cylinder configuration.
The VR engine design: Compact and powerful
The compact design of the HOREX engine is based on a VR6 cylinder configuration, something that was previously only available with car engines. Basically, the VR concept combines the advantages of a 'V'- formation and an inline engine with cylinders arranged in a row (hence "VR"). The VR is similar to a V-engine with two cylinder banks placed close together. The extremely narrow cylinder angle of only 15° makes the engine almost as narrow as a conventional in-line engine, only much shorter
Triple overhead cams
The VR concept enabled HOREX engineers to implement a variety of innovative solutions. The pistons for the HOREX engine are designed with slanted heads. Despite the V-formation of the cylinders, this makes it possible to arrange all six combustion chambers on a single plane. Two intake and one exhaust valve are positioned in a radial array around the central spark plug. This design provides an elliptical combustion chamber for maximum power output. The valves are operated by three parallel camshafts mounted in the head. Thus, the HOREX is the first motorcycle engine with a TOHC (Triple Overhead Camshaft) cylinder head.