glowing headers??

[lildude]

is it normal when it is cold out that when i first start my bike and im warmin it up and if i hold about half throttle the headers start to glow but if i let off they stop and once i ride it they stop???

[hondaracer31]

That is normal on a 400ex.

[tants]

suckers must be hot... :D

[bansheerider_13]

ive had my turn blue b4 in the summer but i dont know what that means lol

[400exInMI]

If you just bought you 400, it is normal for the headers to glow red. They should stop after about 10 - 15 hours of operation. If they are still glowing red, your jetting is way of, you running to lean. Pull your plug, if it is white, you need to rejet or take it to a dealer. The plug should be tan to brown in color.
Hope this helps

[toby400ex]

my pipe turns blue and purple, i dont think my bros 400ex has ever made the headers red, but then again it wouldnt start last weekend, then we pulled the plug and it was all black, and it might have been too black for just a jetting prob, he bought it new this june, is there something wrong with it or does it need rejetted.

[MILF_HUNTER]

my buddies old warrior had a cobra slip on. well it would always turn the header a glowing red color. kinda erie at night when i was riding with him. it was jetted properly and everything. the local yamaha shop kept it tuned for him for free.

[Ralph]

it happend to my 2002 stock 400ex and my friends 2001 400ex on the same night 2

[400exrules]

that would be cool lookin as long as it didnt damage anything

[zephead400ex]

I have WB Pro-meg system...my headers are really blue about 6 inches up the header...I know a blue color is normal but should they be really blue? thanks!

[300exryder]

on my 300ex , the headers are blue almost halfway up the header and then they turn a little yellowish. it is jetted properly, must be the chrome or something?? My warrior's headers always glowed. ran like a bear

[NoFrillz]

The glowing red colour I've never seen so I can't say nothing :D but for the blue, to purplish colour, thats because your pipe has become heat treated, usually happens more on the shinier pipes, when temp goes above like 400 degrees.
Try stickin stainless steel oven racks in your oven and turn on the self cleaning...they'll come out that same purplely blue colour...

[Ryan]

That color most likley means that you need to change your jet size. I believe your running to lean and need to go up a size. Correct me if im wrong

[trxex]

both me and my buddies stock headers glow red at night.2001 400 ex

[forum]

when you buy new chrome pipes spray the insides with black Hi heat paint. THat will greatly help the blueing effect also will help lower the heat i tad.

[joeroadking]

well I just installed the 440 kit and my header was glowing bright red,was 155main, 38pilot, Today I bumped up my main to a170, pilot to 42, raised needle one notch,4th from top of needle and 3 turns out on the mixture screw and it runs exc with little or no glow, this tells me that although many people seem to think the glow is normal in my eyes the bikes are running a little lean. just my two cents oh yeh all jets are kehin(not dyno jet) as well as stock needle for reference

[lildude]

ya my headers got like 6 inches of blueish purple stain. i run a 170 main so i shouldnt be going lean.

when i put my airbox lid back on yesterday so i could run in mudd i would like go to do a weelie in second gear and it would just like die..will drilling the airbox help this?? or am i gonna have to rejet or sumtin