Thinking about changing battery, before my 2000 mile trip in a couple of weeks. Have heard good reports about Motobatt, (Busters £40) A bit cheaper than Yausa.
I bought a "direct" replacement from motobat only to find that it didn't fit in the battery box and the terminals were all wrong and needed a bit of work to actually fasten the wires onto them, then I found that the seat was sittin slightly proud of where it normally sat, don't get me wrong the battery does its job and has good cold cranking power but what I got using specific part numbers was NOT a direct like for like replacement