Staying warm while riding an electric motorcycle during the winter is not as easy as when riding an IC motorcycle that produces a lot of excess heat. When riding one of my IC bikes and it is cold I can always get off and hug the engine to warm up. That doesn't work so well with an electric motor. So wearing an electric vest could be a good idea. Of course, who wants to share their motive power supply with an electric vest and have to wire themselves into their bike, too? Well, here is one solution. A Li-ion battery powered heated vest made by Gerbing, the long-time heated clothing manufacturer. Read the long review here:
http://www.webbikeworld.com/heated-motorcycle-clothing/gerbing-heated-vest/