I noticed in the am when i start up the V the oil in the window was very foamy and a milky color after it got hot it cleared up got 100 miles on it so i dumped the stock oil and filter put in spectro dino oil . Started up this am Thurs. no foam it looked good. Had some small filings and specks about what i get on any new bike. I will later use amsoil 20/50.