Mario Kart 8 Installer - Cemu 1.8.1b ((top)) -

: Extract the Cemu 1.8.1b files to a dedicated folder. It is recommended to create a folder named "portable" inside the Cemu directory to keep all settings and save data local to that folder.

Version 1.8.1b introduced several stability fixes, but Mario Kart 8 still requires specific configurations for peak performance:

: In Cemu, go to File -> Install game update or DLC and navigate to the meta.xml file within your update or DLC folders. Essential Optimization for 1.8.1b