yes on the bottom of the primary
Get the repair manual, follow the steps
how do you take primary cover off an 86 sportster
Take the rotor and the clutch basket off at the same time
remove the derby ( round ) cover from the primary. fill til it tries to run out. replace derby cover.
remove the round derby cover from the primary. fill until the oil tries to run out. replace the cover.
how do you stop oil leaking from a 2000 sportster primary cover
Yes, it is has a very important job. It is the primary chain tensioner adjusting nut. The stud is attached to a nylon chain guide and cannot be removed without disassembly.
under the primary is a 3/4" lock nut, loosen that and adjust the screw by looking through the chain inspection hole. When tightened properly there should only by 3/8" vertical play in chain.
It is chain drive.
engine and primary share the same oil on the 1976 sportster,due to engine oil sumps into primary.
I have a 2006 XL1200R that intermittently does the same thing (I'm wondering if it has something to do with primary chain tension).