The fitting that is seated in the block will have a paste/sealant on the threads so i doubt it is that one, most likely the union fitting, you may have to sacrifice a ring spanner or go buy a cheapie then cut a piece out of the ring end to fit over the hose, undo completely clean threads both male and female with contact cleaner. If this fitting has an 'o' ring do a visual without removing pipe, smear a small amount of petroleum jelly on thread and do up.
As it is a new motorsickle it would tape up the are prior to wrenching to save the paint.