Thought this was cool when hot!!!!
 

I've posted many times about running a lean mix in my toys- here's the pipe on the Punisher (Honda TRX200SX) glowing in the darkness.

I pulled up the video just before the pic was taken- I didn't realize how fast the pipes got hot and stayed that way!!!!
http://www.youtube.com/watch?v=0brdv9OpjAo

I've had a few toys that were like that. In fact, I had a 3-wheeler many years ago that you could light a cigarette off of! Our Honda 450R ran the same way to where it was glowing. Can't imagine the abuse that piston takes!