Kx 65 problems could somebody help i have a kx65 for my son and black oil just blew out of exhaust and trying?

could somebody help i have a kx65 for my son and black oil just blew out of exhaust and trying to kick start it sounds wierd now it wont start and sounds like bearings are messed up ? paul 575 8070 email royalbluepoolz@aol.com