the breaker will trigger much later. it wont go at exactly that current. you need to sustain more then that current for a few seconds, the higher the current the faster it will pop.
personal feelings? just make a direct battery-controller connection and bypass the bms for the controller current but keep it for the rest. that way the bike will still cut out as you lose the control voltages for the controller and it will instantly die if the bms triggers a low voltage or something but it wont trigger on current anymore. that is regulated by the controller anyways.
Lithium beats liquid dinosaurs.