This is true, you don't have to continue to counter steer, once you achieve a "stable lean". On the flip side, you do not have to achieve a "stable lean" to get through the curve. It is all about over coming the forces that are trying to drive you into the ditch. Some times, you can manipulate the situation into a state of equilibrium (stable lean); other times, you have use your arms (counter steer) and body weight.

 

If its a perfect 90 degree turn like in the diagram, thats exactly how they would attempt to take it....turn in from the far outside and try to clip the apex of the turn so they could take it with the least amount of lean possible, which would give them the most speed and get them out of the turn the fastest...but it would also depend on the most optimum exit considering the next turn on the track...they diagram out the entire track like that in practice...finding best breaking point, best apex, best exit, etc...

 

And other times you can just slow down to over come those forces that are trying "drive you into the ditch".

Slowing down, counter-steering and then accelerating is what the diagram shows as one way to negotiate a turn. I believe that is what I do and what I have always done, but I admit when I am actually riding it is hard for me to figure exactly what I am doing because it seems that I do a lot of things simultaneously. I do know it is fun.

 

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I expect they would trail brake into the turn and accelerate out of the turn hard enough to negate the need to counter-counter-steer.

 

This is how I know you have no experience riding.

 

It is true. The faster you are going the more you have to lean.

 

A lot of what we do as riders is instinctual. An advanced riding course can help you understand those things. I've never taken one, but I've spoken with people who have. I wouldn't mind taking one to get a better grip on low speed maneuvers, but I find practice is a pretty good teacher too; along with watching demonstration videos.

 

You are over simplifying the relationship between degree of lean, the radius of the turn, and speed.

 

No, I don't think I am over simplifying. It was explained in this video very well. For every entry speed there is a naturally stable angle of lean. (Notice the word stable) If you are not leaning enough for your cornering speed, centrifugal force will over come gravity and the bike will be thrown out of the turn.