what is the screw plug under the harley davidson "96ci." block?

[always disapointed]

not talking about the trans. or primary drain.

 

[Ruppster]

If you are talking about the one that looks like a drain plug it's the crankcase drain. It's to drain out any oil left in the crankcase. If you plan on doing your own maintenance on your bike I would highly recommend getting a proper service manual. It will answer questions like you just asked.

 

[Captain Awesome]

Right side? It's the screw that holds the air filter cover on.

 

[Bart S]

its a return line port used in the engine manufacturing process when they bench-test run the engine