[Sleeping in EQ]

As a former rider (I gave up the donor cycle after a close call), I can affirm that a woman can ride any bike a man can if she's willing to put the time into learning how to maneuver it (just as a man would have to do).

Upper body strength can help with a long ride, but most of riding a big bike is just practice, balance, and confidence.

But you wouldn't want to commute on a motorcycle anyway (I know you just want to make a point with your roommate). Commuting is maximum risk with minimum enjoyment.