I have recently acquired some real estate in the battery trey (due to ABS removal) and was wandering if anybody fit larger battery in the R1150. I currently have PC680 and it is working but I can tell it is getting weak. It is there from the PO so I have no idea about how old it is. When I got the bike starter motor had lose grease plate that was shorting so it might have taken some life out the battery.If you start and stop the bike couple of times in a close succession starter gets "draggy". Charging is fine @14.2V and I didn't get in a situation that it didn't start yet, but if I can get bigger battery cheaper or at the same price.why not.