The numbers make it clear: The FZ-07 is quite a bit faster than the Zero, and I wasn't even wringing its neck. The FZ-07 benefits from less weight (400 pounds for the Yamaha versus 452 pounds for the Zero) a gearbox, and more horsepower (a measured 66 hp versus a claimed 54 hp for the Zero), but the Zero has more torque (a claimed 68 pound-feet versus 45.5.). One of the benefits of electric motors is that they offer peak power from the word go, so you'd expect the Zero to fire off the line. It's evident however that the bike's computer doles out power gradually. I suspect that is to preserve the batteries but also to protect the rider—lose rear-wheel traction on an e-bike and it'll spin up instantly since there's so little mass to accelerate. Don't ask me how I know!