Clarification
I remeber 1-2 years ago when this issue first came up, and the actual problem, based on my recollections is much more insidious than not having medical insurance. The situation this is designed to correct does not have to do with acutally obtaining medical insurance. I have never been asked my an employeer who was offereing insurance how I planned to arrive at work. The actual problem would be in coverage.
That is to say the bill that congress immediately passed basically said that if your employeer is offering insurance, they can't pick and choose who it is offered to. In addition it stated that if you had coverage previously and a given condition was covered, then if there is no lapse between your policies, any new coverage you obtain had to cover it as well.
The problem for motocyclers (and skiiers, ATV riders, moutain climbers, etc.) was that the insurance agency got to the buerecrats (sp) and got them to say, essentially "Well, if you get injured while engaged in a high risk situation unrealted to your job, we don't actually have to pay your medical bills". So you would be going along on your bike, have some sort of accident, get taken to the hospital, tell your S.O. "Don't worry hon, this is what we have insurance for." Give the hospital your card, get your treatment, go home, recover, and several weeks later get a bill in the mail for all the medical treatment since the insurance company denied your claim because you were injured while on a motorcyle (or skiing, rock climbing, etc.)
The kicker is that while what you were doing was perfectly legal, albeit high risk, people involved in illegal activities such as Drunk Driving would have any injuries that occured while doing so covered, as that was not listed as a "high risk leisure activity".
-Spawn