An interesting argument started on the GSXR board regarding prefilling of oil filters. Do any of you guys prefill your oil filter? The only time I prefill an oil filter is on the Dodge Cummins diesel, which has a huge vertical mount filter.
My own opinion is that on small car and motorcycle filters, prefilling doesn't really accomplish anything particularly with side mount filters because you can't get enough oil in them to make a difference anyway without it leaking out.