This may be of interest/help to someone. I don’t have a bmw anymore having moved to a Honda nt1100 on March. I’m very happy with it btw. Got a puncture tonight. Pumped it up with a pump that comes standard with Renault/Dacia cars. Didn’t blow anything stoped at 45 psi. Got me home. Was it because the Honda has a stronger supply to the plug? Or does the Renault pump suck less juice? Worth a look? JJH