I took the Tiger for an MOT on Thursday (it passed) and when I went to leave the workshop the battery didn't have enough in it to start the bike,i put this down to testing the lights etc with the engine not running but it should have coped with that,workshop checked the battery and it's on it's last legs,anyway it has a the standard YTX14-BS fitted but lurking in the garage I have a perfect Yuasa YTX16-BS battery,apart from being a smidge taller it fits in the Tiger battery box with no clearance issues so would it be o.k. to use on the Tiger? I thought it might even be of some benefit being a higher amp battery for when the heated grips are on?
Had the same on mine, only difference was the taller one came from an Adventurer/Thunderbird fitment.
Thought exactly the same as you as a bit more capacity wouldn't hurt.
It was a Motobatt too so even more capacity, no problems encountered.