Just for the record, I've found all the nominal numbers now. Whatever good that is... anyway, in case someone needs them:
Wheelbase: 1,475 mm
Rake: 26°
Fork offset: 45 mm
Trail: 96 mm
Fork length: 760 mm
Trail is calculated from wheel radius, rake and offset using this formula. All other numbers are actually specified in the WHB, but not always easy to find.
According to some old post here this means the Sporti has different geometry than both breeds of V11's, which was what I wanted to know.
Edit: I wrote 80 mm trail at first, I thought it seemed short and yup, it was wrong (I fed degrees to a function that use radians). The geometry isn't that much different to a V11.