I posted a reply earlier about my confusion regarding the application of the ban. Therefore, I wrote the US Consulate in Guatemala City. This is good for a laugh. I hope I don't have to rely on them-ever. Here is their response:
>
> Date: Tuesday, April 14, 2009, 8:29 AM
> Dear ------
> Thanks for your communication. In fact, last week was issued a new law for motorcycle riders in Guatemala, although we couldn't inform you if this
applies to tourists too, for further information we advice you to contact the
Vehicle Department and you can find their contact information on
the following> link:
> http://guatemala.usembassy.gov/acs_drivers_licenses.html
> Thanks for your attention.
> Sincerely,
> American Citizen Services Unit
> U.S. Embassy - Guatemala
> Avenida Reforma 7-01, Zona 10
> Tel. (502)2326-4405

I found this response unsatisfactory as a taxpaying US citizen and responsed in this fashion:

Hello Again: Thank you for your quick response. However, I expect more from The American Citizen Services Unit. First, I am in Colorado and do not have fluent command of the Spanish language. Secondly, you are in Guatemala City. Third, this is the type of information that should be on your website as news. I would think, as US citizens are frequently passing through on motorcycles, that you would have this information on hand and verify its application to US citizens (tourist or otherwise). There are a number of people who will head in that direction later this year, as they venture to South America. Some fly their equipment in to Argentina, at great expense, and travel back to the US. Either way Guatemala is a transit point. I am not the focal point for distribution of such information. But, I would not find it unusual for a US citizen to contact you or examine your web page, during the advance planning stage. There are people who are
not even aware of this ban. What would happen if it were enforced and resulted in the removal of a US citizen and their detention in some isolated area of Guatemala. Let's us avert that unnecessary and embarrassing situation. If you find this email too abrupt, please accept my apology in advance.

Actually, I wanted to be more blunt. Now lets see what they have to say. If I don't get an adequate response, I will contact my local congress person.