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06 Yfz 450 head pipe glowing red and jetting help please

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I see these forums where people say there head pipe glows red at an idle but when they start moving again it goes away. Well my yfz glows red while 4th gear wide open, is this okay? also i am going to be rebuilding this winter and was wondering if anyone had input on parts to rebuild with... Mega bomb header factory 4.1 open air box lid what should i use for jetting? Thanks for your help Glen

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I would definitely look at increasing your main jet you are running lean and if it is the same in the midrange I would look at raising your needle also.

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