This must be a difficult one to answer? I have looked through the workshop DVD and the parts microfiche and can find no mention of a filter, there is a stariner attached to the bottom of the imersed fuel pump but that seems to br it.
Our old F650 had a fuel filter/pressure release unit which cost a fortune so I doubt many were ever change unless faulty, We did not touch ours in 36000miles.
I did change my R1150R filter at 24000 miles, a real pig to do and I was worried about fuel leaking out of a giant o ring on the bottom of the tank. I took the old filter to bits and there was almost nothing in it.
With this in mind its possible a filter is built into the pump assembly, it looks big in the picture but if it is there is no intenetion to change it.