06 sparks headpipe turned purple

[eagertorace]

I recently installed the sparks big core on my 06 and noticed after a good day of riding, the head pipe is turning purple. I thought it may be a little on the lean side so I checked the plug and it was fine in color. Do these new pipes (06's) suppose to change colors? My brother has an 04 with sparks and his didn't change.
I'll make a phone call this week to find some answers. Anybody else's doing this?

i have a 2005 with a sparks big core, it did the same thing, plug looks good :macho

[Jersey450R]

its inevitable man.

[Dave400ex]

How much better does it run with the Sparks?

[Prey]

mine turned purple too, and i have only had it running for maybe 30 minutes with it on

[Colby@C&DRacing]

When stainless steel gets hot it will turn colors like titanium will. The 06 also seems to have hotter exhaust gas temps.

[400exrider0004]

I believe the turning purple of the headpipe is normal. I know many bikes that their pipes are purple sometimes all the way near the end of the curve.

[Punk'd]

Its just from the heat:)

[eagertorace]

okay I figured it out, the reason my brother's header didn't turn purple is because mine has more power than his:D :D :D

[eagertorace]

Originally posted by Dave400ex
How much better does it run with the Sparks?

feels like it's got more torque and a little on the loud side, almost too loud.