I bought a PC680 for my 1150 with ABS.
Fits easily into the battery box. A few mm narrower which is easily fixed with a section of the packing case. Minor modification of the the battery lead needed.
If you have a non-ABS bike then you will need to remove the spacer in the base of the battery box. I'd post a link to the other threads on the topic but with the search facility turned off....