The killacycle is pretty cool, but that's not the point of this post.
I noticed in one of their press releases that they switch 2 motors from series to parallel on the fly to get more torque at low speed.
Here's the excerpt:
We also implemented a contactor system that allows the bike to shift the motors from series connection on the launch, to parallel connection further down the track. This allows us to push 2000 amps through BOTH motors on the starting line to get something close to a total of 800 ft-lbs of torque. This results in about 2000 ft-lbs of torque on the back tire.
Here's the full press release:
Maybe this applies to the Volt? Gen 2?