I recall in 1978 I had a friend with a new Gold Wing. There is a very difficult to see "sight glass" on the lower right side of the engine. The friend filled the engine until he could see oil at the fill hole......WOW did that engine SMOKE
Rodger 2018 M3W "Dreamers on the Rise" 2004 Plus 8 (wife's) old Goldwings and a couple of Harleys