i believe "we-dare-not-mention-his-name" had 140s on his ZXR250.... not sure however if they were stock or not...130 is stock on ninja 250 and i think 140 was stock for ZXR250, dont quote me on that tho....
on the same topic however, people in the US are putting 150s on the new baby ninja

god knows why.... ruin the handling which is so good on small bikes...
but oh how could i forget... it makes it look more like a 600