hi guys. really newb here, if the post is in the incorrect place let me know, i just bought a 2007 te 450 did an oil change and fixed several other things, this is my first husky, the problem im having is that did an oil change just about 50 km ago, everithing aside a minor oil leak that i fixed adding an o ring couldn handle, checked the level today and oil was grey, ran it for 5 km like that re checked the oil and it was really white, milk like color, coolant level dropped, went back home, the bike started but was loosing power and had trouble iddling. did a search throug forum but no conclusive info found, could be water pump seal or blown head gasket? how can i diagnose it? thanks in advance