Avtrician
It wont help with the broken key, but at least you can strt the bike once its out....
I am shocked he would recommend a lube like Triflow. I know it well. Almost every small arms weapon in the US Military inventory uses it. While I agree that regular lubing is good typically they don't recommend something like this because it can attract dirt which will gum up the pins. You typically use a Graphite lube on locks. That is what I have always used.
Another thing I noticed is that the key that broke on you was one of the aftermarket ones. I though they usually bent not broke. Hmm. That is what I am using. I guess it goes to show that no key is perfect.
I think even with the broken key stuck you should be able to turn the lock with a blade of some type in an emergency
I was in fact able to do this, but only once. The second time, it would not work - my assumption is that the broken piece slipped down further into the lock and it wouldn't turn anymore.