The Republic of Srpska, one of two political entities in Bosnia-Herzegovina, issued five motorcycle stamps on July 25th. The Republic’s English-language website can be found here but it does not appear to have been updated recently. The philatelic part of the Serbian, Bosnian or Croatian-language of the site is here but as of the 30th did not yet list the motorcycles stamps.

I do have an e-mail address for stamp collecting at its postal agency: filatelija@postesrpske.com