The Tiger original Yuasa battery is a bit of a beast - weighs 5.6 kg - Although the Original Tiger 800's electrics were designed to run additional heated kit & devices etc.
So non standard may be a little lighter ? mottobatt ? or dry cell type
You get exactly what you pay for with a Yuasa - so here's to another 8 years of trouble free starting

Note - Now Fitted - Started on the button today & 1 degree here in Cumbria