Electric motorcycles have made large advances in a short time, and they continue to get ever better. California-based Zero Motorcycles’ 2016 range of virtually silent two-wheelers grows to five distinct rides from three, ranging from street and dual-sport models to an off-road dirt bike. Rather than re-invent the wheel, so to speak, Zero has gone the improvement route, with an all-new motor and increased battery efficiency for longer range and higher capacities across the board, reports emerging-technologies Web magazine, Gizmag. Riding the outgoing models hard for a day could cause them to overheat, tripping a thermal management mode that cuts power back to save the engine and battery from thermal damage. The new motor promises to provide full performance for longer, without overheating.