Long story short i'm an idiot (at least I can admit it). My first oild change on a DRZ, did plenty on my KTM. I drained the sump and not the frame, then filled it with the 1.7l of oil it is supposed to have (so 3.4l give or take). I rode the bike for about 90kms (to-from work etc) then noticed oil splatters everywhere up the side of the bike and the engine was covered in oil. I checked the oil level and it was waay overfull and it was pretty milky. I have obviously done some damage but I would like some guidence on where to look, would it be a head gasket or the water pump seal? would there be further internal damage or just a case of replacing a seal and a gasket? Any help is greatly appreciated.