In the 1970s, Rokon, then based in New Hampshire, experimented with a motorcycle with a variable-pulley snowmobile drive. In 2006, Yamaha offered its YCCS—Yamaha chip-controlled shifting—on its FJR1300AE. This took the form of a conventional clutch and gearbox operated by computer-controlled actuators as in Formula 1. In 2008, Honda's DN-01 arrived with the "Human Friendly Transmission"—a self-shifting multi-mode hydrostatic drive like those of high-end lawn tractors. Aprilia's Mana 850 employed a belt continuously variable transmission (CVT) like those of some economy cars. Ducati experimented with an automated conventional clutch and gearbox but did not produce it. The most recent system is the DCT, or dual clutch transmission, pioneered by Porsche but optioned by Honda on its VFR1200F, NC700X, Africa Twin, and Gold Wing. The rider can select automatic or manual operation.