Alta Motors is bringing quiet electricity to the loud, gas-guzzling world of motocross.
The Silicon Valley start-up builds entirely electric-powered motorcycles that founders say are faster and easier to ride than gas equivalents.
Alta's electric racing bike, the "Redshift MX," beat gas-powered motorcycles in its first two races, the company said.
The bike can accelerate from zero to 60 miles per hour in 3.3 seconds, with a two-hour battery life and four-hour charging time. The bike hits speeds of up to 80 miles per hour, and is expected to sell for just under $15,000.