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ZeroLogic
03-12-2006, 08:53 PM
Well after fixing my quad last week. (Timing skipped) I went out riding in the local pits all day today. When I got home I saw my header was turning blue in spots but not like all over. I rebuilt the carb last week also, and it was running great all day. I do have the carb a bit lean, the clip on the needle for the carb is on the second notch leaner. Could the color change be because I'm too lean?
Its a Sparks pipe by the way.
JW450R1
03-13-2006, 05:18 AM
my r header turned blue hmf full exhaust.called hmf.they and every-one else says it's all normal.i really wasn't happy with that thou.i went up 1 size with my slow jet,and it does glow any-more.so my opinion is that yes it's to lean.plus it's a little more peppy comming out of the hole.....
2004exrider
03-13-2006, 07:50 AM
Im pretty sure they all turn blue even with perfect jetting.

Jimmy
Speed_MDS2
03-13-2006, 07:57 AM
The paper work that came with my yosh said it should be a gold colour. It said that blue or purple and your to lean. This info is only good for a stainless system though, Ti turns blue/purple and thats normal.
ZeroLogic
03-13-2006, 01:30 PM
Well the Sparks has been on there ever since I brought the machine also and just started to turn from goldish to a blueish in spots. But I guess its soppose to be like that so thanks for the help.
JW450R1
03-13-2006, 05:04 PM
my header was glowing red when they told me that's normal.i really couldn't beleived that.i went up with the slow jet and the red glow went away,and the pipe just turned to a gold type color.now that i can beleive.
Honda TRX250ex
03-13-2006, 05:23 PM
I think it looks sexy! wish my pipe would do that.
PolarisRider
03-13-2006, 05:31 PM
all headers do that.......after it turns blue for a while, it will start to rust. Its normal;)
blakefoote
03-13-2006, 05:36 PM
all headers turn blue...ive had my LRD for 2 days and it is blue and purple...I prob havent rode it a total of 1 or 2 hours
ohsobad_chevy
03-13-2006, 07:23 PM
Ive always heard that when your head pipe turns blue, It means that you are jetted correctly. Dont know if it is true or not.
GPracer2500
03-13-2006, 09:07 PM
Originally posted by ohsobad_chevy
Ive always heard that when your head pipe turns blue, It means that you are jetted correctly. Dont know if it is true or not.

Head pipe color (i.e. patina--not color as in red hot) is an unreliable indicator of right/wrong jetting. There are too many variables such as head design, pipe design, pipe material, pipe finish, etc.
wilkin250r
03-14-2006, 10:50 AM
Here is one thing I DO know. The stock 400EX header will actually glow read on occasion. BONE STOCK, stock filter, stock exhaust, stock jetting, stock everything.

If it runs like that off the factory floor, I'd say it's normal.
GPracer2500
03-14-2006, 10:58 AM
Originally posted by wilkin250r
Here is one thing I DO know. The stock 400EX header will actually glow read on occasion. BONE STOCK, stock filter, stock exhaust, stock jetting, stock everything.

If it runs like that off the factory floor, I'd say it's normal.

Almost all bikes come from the factory with lean jetting settings. Thank the EPA for that.