I once a Triump Bonneville that had a habit of the main SU carb jet vibrating loose. That made the mixture on that side very rich & it would cut out or run badly . Having 2 carbs the other cyclinder still ran. I'm not sure what kind of carb you have but could the jet(s) have moved?


JohnV6
2022 CX Plus Four
2025 MG ZS EV aka Trigger