I’ve been trying to read all about sumping but there are many threads with a lot of conflicting information. Can someone shed some light in simple terms and answer a few quick questions please?

From what I can gather, the scavenger pump cavitates or is otherwise incapable of returning oil to tank and allows oil to collect in the crankcase leading to a low oil condition and an overheated engine resulting in engine failure. Correct?

This condition only seems to affect touring models?

My older riding buddy just yesterday picked up a 2018 107 Softail Deluxe. Is this engine at risk for this condition and what should he be aware of or watch for?

Thanks.

Thanks!