Hello I just got a 1989 Kawasaki kdx 200 for free off one of my buddy's ,he got a new bike ,anyways when I first got the bike it would kick over but wouldn't start ,so I decided to check the oil in the case and noticed white milky stuff in the oil (water or coolant) so I changed the case oil and now the kick starter is locked up it won't move at all ,it was fine until I changed the case oil any ideas? I'm planning on taken the motor out and rebuilding it ( I have never worked on dirt bikes) only lil stuff never done motor work ,,just wanted to know if I should check the tranny or or just rebuild the top end ,please help I'm stuck just wanted to get some tips ,ideas before I rip it apart thank you