Pro Moto Billet WR Silincer Insert

I have a 05 WR450F did all the free mods except the smog, I put on the Pro Moto Billet WR Silincer Insert tonight and fired it up, the header of the pipe started glowing red. Can anyone give some advise on this to what's going on or what to what I'm doing wrong.

Assuming your jetting is correct, that is a completely normal thing. All the WR's and YZF's will make their headpipes glow red if there is no airflow over the headpipe. Don't worry it isnt the silencer insert, I have one too on my wr250f..no need to be alarmed. Also, you may want to check out: www.thumperfaq.com :)

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