I semi-recently upgrade to 09 yz450f from a 05 wr450f so this is my first “motocross” bike. So anyway, I had it topped it out today a couple of times with 85.7mph being the highest speed (measured by GPS) (purely stock too) (~6500' elevation). When I got back to the truck I noticed some oil had come out of the crankcase breather hose and oiled my chain and rear rim a bit. Has anybody else experienced this? Did I simply have the revs too high? I’m pretty sure it was not overfilled and I only tipped over once today for just a second or two on the right side of the bike so I doubt it was because of the prior tip over, but maybe it was. As far as every thing else goes – it’s a totally awesome bike! Oh and sorry if this a old/dumb subject. I briefly searched and didn't find anything.