Had my first ride in the woods on my 08 yz450f! wow! but that deserves a separate thread... the manual says change for oil after break in (which is for me - now) a buddy mechanic of mine in UAE used to say they put crap fork oil to our new CRFs so we flushed and changed the fork oil first thing... how do you guys go about it? is it an absolute must? or it can wait 10-20 hours (or when seals start leaking)?