I had a hornet before that had the same size rear but the more common 120/70/17
instead of the 748s 120/60/17.
I used to run 42 rear and 36 front.
I'll see what mine are tommorow, the tyres feel soft but are perhaps not good in the wet. They are new and came with the bike so don't want to fork unecessarily.
Thanks
Lee1980