I seem to be posting something like this every couple of months or so lately, as more and more news comes from different makers producing electric dirtbikes.
Over at autoblog green, there is a story about the new Zero Motorcycles MX model with heavier duty forks and shock. Read the full story here: http://xlnk.me/2p or watch the video of the MX bike in action below.
It is funny to hear how loud the chain and other gear is when there is virtually no motor noise to mask it ;-)
I'm really looking forward to one of the more mainstream manufacturers coming out with thier electric offering. Once that happens, their popularity should skyrocket.