While I strongly recommend against using torrents for software downloads due to potential risks (such as malware, viruses, and legal consequences), here are general guidelines for obtaining MotionBuilder:
If MotionBuilder 2014 is specifically needed for a project and you're having trouble finding it through official channels, consider reaching out to Autodesk's customer support for guidance on legal and legitimate access to the software. motionbuilder 2014 64 bit torrent download link