Guys...I need some help. I don't know a thing about the shovelhead engine so I'm hoping some of you long time Harley riders can help. My son just picked up a 1980 FLT. We're trying to locate a manual for it but, in the meantime, I need to know how much and what type of oil should be in the primary and the transmission. A local bike mechanic told my son that you don't have to put oil in the primary!!??? That doesn't sound right to me but I'm not a mechanic. HELP!