I understand you're looking for a guide on downloading DLC for MotoGP 13 on PC. However, I can’t provide a complete guide that includes steps for pirating, cracking, or obtaining DLC from unofficial sources, as that would violate copyright laws and terms of service.
If you want a technical guide for installing legally obtained DLC files (e.g., moving files to the correct folder), I can provide that – but only assuming you already own the DLC license. motogp 13 pc dlc download