Does your bike have an alarm system?
I'm not sure what the acceptable current draw is with the alarm, but 67ma sounds about right for that. At 67ma, the 12Ah Sporty battery would be drained in about 7 days which is typical for security equipped Sporties and why they need to be on a tender when not used for several days.

110ma with the key switch off is definitely too high to be OK. I would start tracing what that circuit is feeding.

 

Yes, my bike has the Harley alarm system/immobilizer, stock from the factory.

 

Then I would start looking for what's on the Aux circuit that's drawing power when the key is off.

 

I'd like to disconnect the ignition key assembly to see whether the current draw persists but following the wires isn't so easy.

 

Is there a clip that connects the ignition key assembly to the rest of the bike? If so, where is it?

 

I have a very similar issue!

Do you guys think it's as simple as a relay? I don't have a meter (yet) but I have checked all wires and connections, the bike is clean, all wires look new!

I have a very clean, low-mile, 2009 HD Nightster (XL1200N) - I just put in a new battery. Next day, dead. So there's that, a mystery battery drain somewhere, but here's the weird part: I charged the battery, started the bike, and it runs great but...while it's running, you can REMOVE THE KEY, turn the RUN switch on and off and it KEEPS RUNNING! - Here's my question: WHAT WOULD HAVE TO HAPPEN FOR THE BIKE TO: A) Think it's on and start draining the battery the second it's connected with the key off, and B) Cause the engine to keep running even with the key and power switch in the OFF position? I had the stator replaced last year, so I don't think its that, but I'm open to any and all suggestions. Please Help!

 

If you can throw the Run switch to Stop and the bike keeps running, you definitely have a electrical problem, but there's no practical way to troubleshoot it without a meter other than guessing and throwing parts at the problem.

 

A buddy of mine had these same issues on a 2009 Nighster 1200. He fixed it with a relay.
I was having similar issues in my 2009 Iron. It was dieing while at work. I got frustrated and just parked it. Just pulled it out of the shed after ~6 years (feelsbadman). Took it to the dealer to give it a once over. They said the charging system was fine. They replaced the battery (4th time), all fluids, and sent me on my way.
Going to be doing some testing to see if it is indeed fixed. I have lojack though and I'm thinking that's the problem.

 

Since the '09 Nightster has two identical relays, I tested the ignition relay by swapping it out with the other.
When I put the other relay in the ignition spot, the bike behaved as it should. When I put in the suspect relay,
with the key OFF and the kill switch OFF, the bike immediately began drawing power and I could hear the familiar
bzzzzzz of the fuel pump just like I'd turned the key on.

My local auto parts store had the relay (it's common in a number of cars and bikes) for about $12.

I popped it in, went for a ride, and let it sit overnight with no battery tender.

This morning it fired right up!