A fuel injected modern sport bike, will not run without the battery connected.We placed a new stator and a new rectifier/regulator on our 2011 GSXR 1000. When we remove the negative cable from the battery, it shuts down. What else can it be?
The alternator keeps the battery charged, it’s not used for starting the bike.If I read the schematic of my K5 right, both the battery and Alternator can supply the starter relay with power independent of each other
But I admit, that is a K5 is not a 2011