Exhaust header leak

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oczer79
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Exhaust header leak

Postby oczer79 » Sat Apr 19, 2014 5:57 pm

I had a small mishap today where the rear header pipe under the engine hit a rock. It bent the whole header up and now it's leaking where the header attaches to the cylinder head. You can't see any leak, but i know it's there because the noise has changed and it backfires a lot when letting go of the throttle.

My question is, can I still ride the bike while waiting to get it fixed, or is there risk of valve damage?
KTM Superduke 1290 R

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bic_bicknell
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Re: Exhaust header leak

Postby bic_bicknell » Sat Apr 19, 2014 6:09 pm

Why not fix it immediately? All you probably need to do is undo all the connections on the exhaust and reassemble it true. Maybe you need a new gasket between the header and the cylinder head but you can check that out quickly. If you haven't had the exhausts off before or for a long time it's worth soaking the nuts and thread with a penetrating oil because they can seize on and you can snap a stud off which is a pisser. I'd advise that if you are ordering parts like gaskets then order four new copper nuts - it's worth it.

But if you have to ride it in the mean time then I think you would be OK, it just might run a bit lean.
Past: Honda CB125J, Honda TL125, 1963 Triumph Tiger 90, Yamaha RD250, Kawasaki KH250, Kawasaki 400 S3, Kawasaki KH400, Kawasaki Z400J, Suzuki GS750, Suzuki GS1000, Ducati SS900 Superlight, KTM LC4 Supermoto, Honda VFR 800i, KTM Superduke '07.

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oczer79
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Re: Exhaust header leak

Postby oczer79 » Sat Apr 19, 2014 6:14 pm

I only have 250 km left before i have to take it to first service, i figured it could just wait until then. It's easter and all shops are closed so I wont be able to buy a new gasket, thats why id rather not remove the headers. Besides I can clearly see there is a dent in the pipe from the force of it being pushed up.
KTM Superduke 1290 R

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bic_bicknell
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Re: Exhaust header leak

Postby bic_bicknell » Sat Apr 19, 2014 6:41 pm

What were you doing? Motocross? :lol:
Past: Honda CB125J, Honda TL125, 1963 Triumph Tiger 90, Yamaha RD250, Kawasaki KH250, Kawasaki 400 S3, Kawasaki KH400, Kawasaki Z400J, Suzuki GS750, Suzuki GS1000, Ducati SS900 Superlight, KTM LC4 Supermoto, Honda VFR 800i, KTM Superduke '07.

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oczer79
Two wheeled terror
 
Posts: 149
Joined: Mon Jan 13, 2014 2:45 pm
Location: Norway

Re: Exhaust header leak

Postby oczer79 » Sat Apr 19, 2014 7:00 pm

I had an argument with a sidewalk. It got heated, words where said, punches where thrown. In the end we both ended up a little worse for wear. :?

BTW, the 1290 has less ground clearance then it seems.
KTM Superduke 1290 R

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No. 47
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Re: Exhaust header leak

Postby No. 47 » Sat Apr 19, 2014 8:22 pm

No risk of valve or any other damage on the 990 so would assume the same for the 1290 - have they really continued with the rear header gasket detail?
'08 ex-Battle race KTM Superduke 990 R No.47
'08 OE KTM Superduke 990 R
'01 Ducati 996S

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oczer79
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Re: Exhaust header leak

Postby oczer79 » Sat Apr 19, 2014 9:40 pm

No. 47 wrote:No risk of valve or any other damage on the 990 so would assume the same for the 1290 - have they really continued with the rear header gasket detail?



I am unfamiliar with this issue. Are leaking headers a common occurrence?
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DMacL
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Re: Exhaust header leak

Postby DMacL » Sun Apr 20, 2014 8:18 am

No. 47 wrote:No risk of valve or any other damage on the 990 so would assume the same for the 1290 - have they really continued with the rear header gasket detail?


1290 gaskets are identical to 1190 ADV ones, I didn't check any other bikes though.

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No. 47
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Re: Exhaust header leak

Postby No. 47 » Sun Apr 20, 2014 9:34 am

oczer79 wrote:
No. 47 wrote:No risk of valve or any other damage on the 990 so would assume the same for the 1290 - have they really continued with the rear header gasket detail?



I am unfamiliar with this issue. Are leaking headers a common occurrence?


Misread your post - was thinking same as 990 ceramic/graphite ring at rear of rear header.
'08 ex-Battle race KTM Superduke 990 R No.47
'08 OE KTM Superduke 990 R
'01 Ducati 996S


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