[QUESTION] Yamaha Virago 535 rear brake upgrade

Dear redditors,I cannot find a final answer to my question. I want to upgrade the breaking capabilities of my 95' Yamaha Virago 535. In order to do that, I need to know if it's possible to change the rear brake into disks. I looked around for rear disk brake on other Virago models (XV1000 & 1100) to adapt the swing-arm but it seems that all models have drum rear brakes.The WHY : There is a motorcycle licence in my country that allows me (for 2 years) to have a machine up to 47,5 hp, the Virago 535 is perfect for that and I'd like a little bit more safety with this old bike (front brake line upgrade is on the way).Thank you in advance for your answers, and excuse me for my poor english.EDIT 1 : It seems that the XS1100 have rear brake disk. Any experience with this type of transformation ? via /r/motorcycles https://www.reddit.com/r/motorcycles/comments/eob9b8/question_yamaha_virago_535_rear_brake_upgrade/?utm_source=ifttt