Header Pipes getting red.

Lucky said:

After starting my new fe 450 04 , i find out that the Header Pipes becoming red after a while in idle.

Is this normal, or is something wrong?

Paul

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Hi Paul,

Glowing head pipes are quite common regarding a new bike in an "as delivered" state of tune.

Research the topic further via 'UHE Fuel". Plenty of assistance is always available.

http://www.husaberg.org/modules.php?nam ... wforum&f=7

Kind Regards,
Dale

Yes, leaving the hot-start on adds fresh air to the carb and leans out the mix causing red hot pipe syndrome. Recheck that your hot-start is off and try again.

Do you have any idea what jet numbers you're running?

look. lucky!. if it's running well-leave it alone!

all i would say is that when warm, if you have a flat spot etc adjust the pilot screw out .5 of a turn if not leave. this is the only thing you should touch if all is well!

regards

Taffy

Lucky said:

Thank you for all the good advices.

So Taffy, you mean that the red color lighting up in the dark is nothing to worry about.

The bike starts very easy, and sounds good.

I have now stripped the bike, and want to do some fixes before taking it out in the winter forrests of Norway.

I really cant wait to feel the Husaberg power after a year with orange.

I will be back with a report after new year.

Regards

Paul

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Taffy is correct in that if you are happy with all other aspects of performance "simply ride" as prolonged idling and / or excessive idle rpm will indeed overheat the thin wall header.

Dale

Absolutely, I see it quite often.I know it is single wall pipe but every time that i see it still raises that little concern that it might be lean.I usually try the fuel screw and see what it does.In alot of my cases it seems that radiator purging when idling for a long period of time comes next.Mind you i work on other brands as well ie:yz450f.I think it makes for quicker spikes in head temps if you are running a little lean and just idling or blipping the throttle and not moving.

Start your motor in the darkest area you can find and you will see about 3 inchs of cheery red. If any one out there has a FLUKE METER with the temp aaccessory you can read up to the head, at this time I only have a meter and it's limit is 500 F. I can only read at the spilt of the headers and there it is just at 500 F.

Don't worry, it's normal. Mine does it too, but can only been seen in the dark. As stated ealier by Taffy and Mr. Lineaweaver, if it's running good just go out and ride it and have a great time.

the thing to remember is this

if it's rich it runs at 500 degrees farenheit
if it's spot on it runs at 800 degrees farenheit
if it's lean it runs at 1300 degrees farenheit.

so lucky, let's say that it goes red at 799 degrees farenheit plus-what am i saying?

regards

Taffy

Lucky, I wouldn't worry about exhaust gas temperature at idle, as as an engine isn't producing any appreciable work here. You likely have a rich idle and maybe a little bit of a fast idle. You're seeing the result of raw fuel burning in the header pipe. When you're ripping on your bike I can assure you that temperature in the pipe is very much higher. Just don't try sticking your tongue on it to see how hot it is, especially when riding. It's nice to hear someone on here describe his bike as running great. Good luck and welcome aboard. CC

I have the same issue, FE 450 2009, saw it yesterday. was going for a 60km ride, and i could see it the whole way leaning over... my idle is higher, will turn it down when i find the screw, but when i am riding, just cruising at 40-60 km at negative 100 rpm? just strange, cannot say i've seen this in my crf450 carburated, BUT, this is a MX and has no lights, yesterday was at dusk into the night so..

On efi bikes, with the lambda, wouldn't the system add fuel if it were lean? a thorough clean of the efi system might help me as well as others having this issue. bike runs well but wont really go on one wheel by itself, like the crf, that one just puts you on your back, and without asking. i guess that's what the 10 hp difference will do to 120kg bikes.

steel generally goes red at 900F, and burning fuel in the exhaust has a cooling effect, will never make your exhaust glow. It's more an indication of spot on combustion or slightly lean. Some racers (what ever sport) dump fuel in the chamber at the exhaust stroke to cool the piston, valves and everything else. But when i am cruising the red should go away. I dont think 100km/h (the speed when the glow is sufficiently cooled) is the speed intended for enduro bikes, something must be up.

please guys update how your exhaust look at night, not when going nuts, just cruising =)

cheers

create your own thread please? this one is 18-years old.
Taffy