No, it is not allowed to place non-compliant electric motors on the EU market : A product intended to be placed on the Union market, offered in a catalogue or online, has to comply with Union harmonisation legislation.
Where a product is not intended for the Union market or is not compliant with the applicable Union legislation, this has to be clearly indicated (e.g. by providing a visual warning).
Disclaimer: Please note that the European Commission cannot provide a legally binding interpretation of the EU legislation, as this is the sole competence of the European Court of Justice. Any remarks from the European Commission services are without prejudice to the position the Commission might take should related cases arise in a procedure before the Court of Justice.