Inner Outer Primary

[HD-Dyna]

Hey all. Quick question if I remove the Inner and Outer Primary case Do I lose engine oil or just primary oil? I'm removing them but unsure if I do the engine oil replace before or after i remove them. Thanks for the help 

[xlfan]

Just primary oil

[HD-Dyna]

Thank you for that 👍

[motorhogman]

A Factory Service Manual can be your friend..