Header pipe glows in the dark!

Today I got my 03 450 street legal, after driving around the neighborhood, around 30 to 40 mph, pulled in the driveway and about four inches of my header pipe was red. Is that common? :naughty:

If you had been stopped for a couple of minutes, it's normal. If you had JUST stopped, then it could be too lean.

umm, that happens on my ttr225 that is like 20 years old lol, and it only happens when i start it and hold the throtle wide open to keep it going till it gets hot.....then it runs good.

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