How do you change and check the primary oil on a 1999 harley-davidson heritage?

Answer 1

Make sure bike is straight up, not on side stand. Remove drain plug at the bottom of the primary directly under the clutch assembly. This uses a torx bit (star wrench). Once oil is drained, preferably into a container, replace plug and remove clutch cover (big round cover). Using a funnel, refill primary through this opening with the proper amount of a quality V Twin primary chain lube. Fill to bottom of clutch diaphragm spring or bottom of opening. This will be approximately 1 quart, give or take an oz. Replace the clutch cover.

Answer 2

On your left side of bike, is your primary the big round cover is your derby cover take it off, that's where u inspect your oil. Oil should be fill up to bottom of clutch pack. To drain your primary oil there is a drain plug on bottom of primary towards right side if not there it is beneath the derby cover.