Zero X
The Zero X is an electric motorcycle manufactured by Zero Motorcycles. Specifications. The wheels are driven by hardened steel 420 chain and direct drive gearing. Braking is performed by six-piston calipers per axle, with a front rotor. It includes rear rim with rear tire and front tire. Standard battery pack is made from lithium-ion, with rated range of up to two hours or . Recharging is done using 120 V or 240 V with a charging time of two hours. Other features include USB port that allow access to the bike's motor controls. Extreme Package includes  Higher Power Perm Motor with 10% more power over stock and faster top end speeds, customized stronger fork. 2009. Changes include improved chassis, which features hydroformed top tub, larger swing arms, thru-axle rear hub, shot-peened and anodized frame, organic frame gusseting, new number plate. As a result, it was heavier (now ) than 2008 model. Prototype of 2009 model was unveiled in 2008 Alternative Energy and Transportation Expo in Santa Monica, California. Sales. On 24 September 2008, Zero Motorcycles announced all 2008 models had been sold out.