I service all my cars and bikes early. Bikes @ 7 500 and cars after every track outing or 10k km's. I always change the filters as well as oil, the ktm has 3 oil filters that get changed.
My reasoning is somewhat personal preference, the way I see it, I'd rather change the filters than take the chance that one of them can't flow enough (due to them doing their job and becoming "clogged" with particles) and the engine undergoes some or other form of oil starvation.
Like I said, it's a personal preference thing for me, but I expect the best out of my vehicles, and as such, they get treated in such a manner.
:Ninja: