Exhaust valve seized

General discussion of the BMW R1200RT/R1250RT
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Beagle
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Re: Exhaust valve seized

Post by Beagle »

I thought the cat was part of type approval. Im suprised if BMW approve the fitting without it.
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David.
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Re: Exhaust valve seized

Post by David. »

The Akrapovic silencer is the only one approved for use by BMW.

Don't know if these headers are approved for use by BMW. The observation is that the valve has been retained.

If fitting the non-cat. version Akrapovic recommend the following.

When installing optional headers E-B12R7, remapping the ECU is recommended in order to prevent »check engine light« warning signal and achieve optimized performance and throttle response.

THIS PRODUCT DOES NOT MEET EMISSION COMPLIANCE REQUIREMENTS FOR STREET OR HIGHWAY USE.
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Beagle
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Re: Exhaust valve seized

Post by Beagle »

“ THIS PRODUCT DOES NOT MEET EMISSION COMPLIANCE REQUIREMENTS FOR STREET OR HIGHWAY USE.”


Exactly!
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David.
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Re: Exhaust valve seized

Post by David. »

I wonder if the Akrapovic header with a catalytic converter is approved for use by BMW.
Casbar
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Re: Exhaust valve seized

Post by Casbar »

David. wrote: Akrapovic manufacture exhaust headers for the 1250, https://www.akrapovic.com/en/moto/products/BMW/R-1250-RT?brandId=44&modelId=994&yearId=5778

Options are available in Stainless Steel or Titanium. In both cases, they have an exhaust valve, with or without a catalytic converter.

Image

Image

Interesting that the exhaust valve has been retained in all cases.
I wonder if they have had to do this to have them approved for use by BMW.
"Featuring exhaust valve for improved rideability in lower rpm."

Check out the installation instructions to see photos of the different Akrapovic v's BMW exhaust valve.
https://d1sfhav1wboke3.cloudfront.net/ImageServer/Apim2media/Documents/20687/a97ade48-8c42-4717-85de-617698a7ee92.pdf

That link is for a GS and GSA, different headers, is there one for the RT as well? Could look myself I suppose :)
guest4915

Re: Exhaust valve seized

Post by guest4915 »

It's a bit late after you've traded it
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David.
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Re: Exhaust valve seized

Post by David. »

These Akrapovic installation instructions cover all R1250 models,
https://d1sfhav1wboke3.cloudfront.net/I ... 358c0b.pdf
Last edited by David. on Thu Apr 16, 2020 6:34 pm, edited 1 time in total.
Casbar
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Re: Exhaust valve seized

Post by Casbar »

David. wrote: These Akrapovic installation instructions cover all R1250 models,
https://d1sfhav1wboke3.cloudfront.net/ImageServer/Apim2media/Documents/20688/a3e289b7-8b0f-41c1-94f4-507ea6358c0b.pdf

Great, its just they show the GS headers, which are different to the RT. But let's be honest, its not rocket science to change headers - is it
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Re: Exhaust valve seized

Post by simbo »

Casbar wrote:
Great, its just they show the GS headers, which are different to the RT. But let's be honest, its not rocket science to change headers - is it

Not for anyone with any mechanical skills it's not, it's a very straightforward job.
The GS 'is' the better bike :-)
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David.
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Re: Exhaust valve seized

Post by David. »

Beagle wrote:Took silencer off to lube the flapper pivots.
What lube was used, was the flap seized and is it free now.
Beagle wrote:Service light now comes on but will have to wait till dealer will do it.
Can the service light be reset with the GS-911, https://www.youtube.com/watch?v=HmYQDuQyPFA
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Beagle
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Re: Exhaust valve seized

Post by Beagle »

Borescope Pictures of Flapper Valve and Cat
Attachments
Catalyst.JPG
Flapper Valve 2.JPG
Flapper Valve 1.JPG
Flapper Valve 3.JPG
Last edited by Beagle on Tue Apr 21, 2020 2:48 pm, edited 1 time in total.
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David.
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Re: Exhaust valve seized

Post by David. »

That flap looks very clean, no sign of carbon or lubricant.
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Beagle
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Re: Exhaust valve seized

Post by Beagle »

I only use Shell Nitro both in the bike and the X1.
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Re: Exhaust valve seized

Post by David. »

David. wrote:What lube was used, was the flap seized and is it free now.
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Beagle
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Re: Exhaust valve seized

Post by Beagle »

Wasnt seized just relieving boredom. Used Graphite/Copper spray.
Last edited by Beagle on Wed Apr 22, 2020 1:38 pm, edited 1 time in total.
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