When Kawasaki introduced the Ninja e-1 and Z e-1 last month, the electric naysayers honed in on four figures: 7 rated horsepower (12 maximum horsepower), a 51-mph top speed (59 mph with e-boost), a 41-mile range, and a 7.5-hour recharge time. OK, maybe that’s more like six figures, but the collective reaction may not have been so critical had one figure been lower — price. Then there's the pricing: the all-electric Ninja goes for $7,599 and the e-powered Z starts at $7,299. That's lower than street-legal electric motorcycles from the established competition in the United States, such as Zero, but of course more expensive than comparable or even more capable internal-combustion models. In parts of the world with tiered licensing, the electric Kawasakis may be an easier sale, but can the company succeed in the U.S. market with a motorcycle that's mainly limited to duty within city limits? Kawasaki is about to find out as it's now taking pre-orders and pitching its first-...