Good Morning,
Is there any way of adjusting Kart Chassis stiffness in the simulation?
You can go into the "chassis" folder and adjust from there. However, Raise did a great job at modeling individual frames and their respective diameters (see Sim Kart Modeling (https://simkartmodding.freeforums.net/thread/232/release-drkarter97-physics-overhaul-7)). If you adjust the .ini files in the "chassis" folder, you will not be able to join any server that does not have the modified files.