Here's a bike that runs entirely on electricity. Zero Motorcycles of Santa Cruz, CA has introduced the Zero DS, a fully electric, dual-sport motorcycle built for both the city street and the dirt trail. The Zero DS was designed from the ground up as an electric vehicle. Each component on the bike ó such as aircraft-grade aluminum with lightweight strength ó was designed to minimize weight and maximize energy density. The Zero DS is emissions free, and its parts are non-toxic and almost entirely recyclable. The bike's power pack consists of lithium-ion cells that are landfill-approved.