Exide, same as the OE battery. (UK bike)
Duke 390 though.
I’m sure the BMW will have a similar battery. I bought the Exide because it’s a respected brand and being the same physical size it fitted perfectly.
(Some Lithium batteries are smaller, which is OK but the battery holder might need modifying)
Last edited by lightning; 07-12-2019 at 06:04 PM.