Here :
https://www.navigantresearch.com (Search for motorbike for the study) You can register for free to access the exec summary
See also the 10 predictions for e-mobility in 2015 :
https://www.navigantresearch.com/wp-assets/brochures/WP-EV10P-14-Navigant-Research.pdfElectric Motorcycles Breakout as Transportation Alternative
The last few years have seen growth in the two-wheel EV market, but that growth has largely
been attributable to either e-bicycles or e-scooters. Sales of e-motorcycles have been
increasing, but the market remains a tiny fraction of the e-bicycle and e-scooter market (5.2
million e-bicycles and e-scooters compared to about 30,000 e-motorcycles were estimated to
have been sold in 2013 outside of China). However, there are a number of factors that point to
the potential that higher powered e-motorcycles may see a big year in 2014.
First and foremost, there are more products available for purchase with new entrants ready to
boost the market profile. While in the past e-motorcycle growth was focused on range and costeffectiveness,
2013 turned a corner on these issues with Zero Motorcycles and Brammo both
offering higher power (>60hp) motors and a range of 100-plus miles. Superbikes have been
coming fast and furious as well, with Lightning Motorcycles, Mission Motorcycles, and a new
player, Agility Motors, demonstrating high-powered (and expensive) e-motorcycles. Traditional
motorcycle players are now on the verge of entering the market as well, with Yamaha and BMW
offering products in 2015.