Well after a little green landing & some slips & slides on damp mud, I decided that some proper tyres were in order.
So here they are.
https://www.dropbox.com/s/p9axavapg7...%2024.jpg?dl=0
https://www.dropbox.com/s/9inhv73o1o...%2033.jpg?dl=0
https://www.dropbox.com/s/4219iz1i3q...%2049.jpg?dl=0
Only had a brief scoot up our street, so will report back on use later.
Front is stock size 100/90-19 rear is a 120/90-17 which is 40mm taller and than the stock Kawasaki 130/80-17. So works out about 6% larger radius, so should raise the gearing a little. They look good IMO.