From the American Legion magazine dated Dec. 2006, page 59:
"If the U.S. Flag is flown alone, it must be displayed at the center, or at the rider's right side."
"Any other flags - other countries, POW flags, service branch, etc. - should be displayed to the rider's left. Those flags can be the same size as the U.S. Flag or smaller."
"For safety, it is recommended that any and all flags be flown from the back of a motorcycle."
