Normal for change in idle between hot and cold?

When my bike is cold with NO choke, it idles very slowly and almost wants to turn off. When I ride it around and warm the engine, I stop and the engine is idling fairly high. Is this normal? Bike runs great though.

It's normal for my 426 to have the header glow bright red when I just sit and idle for a minute or two. As soon as you get going, the pipe will cool off and turn back to the normal color. I have heard if you ride for awhile and it stays that cherry red, you might have a lean condition in your bike. The 426 I ride, will puke coolant if I idle for about 4 minutes, they overheat very fast. My rule of thumb is that if I am stopped for a minute or more I just shut it off, and turn it on and take off when need be. Thanks Rich Rohrich. Impressive explanation.