"EVERY EXIT IS AN ENTRY SOMEWHERE ELSE." Tom Stoppard

On the US side i had not one problem, i wasn't even stopped.

At Immigration in Mexico we paid a $US 22.50 visa plus the $US 39 fee (valid for a month) for importing the bike, which you need to also present bill of sell, passport and license.

In half an hour it was all done the bikes and the riders were legal and ready to keep going