Why link to brammo? Brammo used a sevcon controller, not motor (not sure if they use a Sevcon controller for the production model). I know they use a different brand for their Enertia.
The motors in the two bikes (Enertia and Empulse) are both from PMG. They're PMS series motors, and the Empulse is liquid cooled.
I'd contact Sevcon (good luck, they're kind of bad with customer service) for motor specs. I haven't seen any real specsheet or curves since I've been looking at AC motors for my motorcycle (1-2 years). I ended up with a high voltage 1238 and an AC15 from HPEVS.