What’s new? Let’s go inside out. It all starts with the new power plant, an air-oil cooled, 650cc parallel twin. Royal Enfield has designed the engine to deliver an easy but fun ride. The combination of the parallel twin, SOHC, air-oil-cooled engine that is mated to an all new 6-speed gearbox. The engine is vibration free, thanks to the crankshaft balancer and the 9.5:1 compression ratio.