Did it feel like she was running out of power.. almost like a carb problem?
I had a similar thing and it was the Reg Rec.. think they are separate units on the B1… but check you battery charge and make sure its charging when your running.
Take a reading off the battery while it’s just stud.
Then start it on idle and see what the reading is at while the bike is idling also get a reading at 4-5 k and see what that is.
