Exhausts and Engine » Exhaust valve issues

Schoolboy error - I should've posted this with my last post. Sorry.

I'm told by a mate who's a Police motorcycle mechanic that some of the exhaust valves can stick causing massive issues as they're part of the headers and require the whole exhaust to be removed for repair which in itself is a tricky repair.

So - is there any preventive measures that can be taken to lessen this risk that anyone knows of ?
Or am I worrying unnecessarily ?

Cheers

Zitat von Rutland Rider im Beitrag #1

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Or am I worrying unnecessarily ?

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You've got to worry about something !
I like to keep my bikes for a while - my R1100S was an '02 model and I was still proud of it in '18. My preventative maintainence regime obviously worked.

I'm guessing that you mean the flap valve in the exhaust and not the actual exhaust valves in the cylinder heads? I had no problem with the flap valve in 10000 miles.

I don’t recall anyone reporting a problem with the exhaust valve opening (or not) on this forum so far and there are many thousands of kms ridden on here, so I don’t think its a significant concern.

In the worst Case, there is Everything individually :

https://www.leebmann24.de/bmw-ersatzteil...g=18&bt=18_0999

The exhaust valve on my 2017 had seized and was picked up at the end of warranty inspection (@2 years approx 27k miles). My brother's GSA had the same but earlier in mileage and age. I think it's a weakness but I've no suggestions on prevention. Both had new headers fitted.

The flapper valve in my '11 R1200RT got stuck at a 45 deg. angle about the 40,000 mile mark. On that bike I fixed it with an aftermarket tube that replaced the valve section of the exhaust. No problems with codes and such on that bike. The wethead system is quite different as it is part of the whole forward exhaust system. I would suspect that at some point the valve will have a problem.

I worked on turbocharged light aircraft for a long time and we would use a product called "Mouse Milk" to lubricate the wastegate valves on those exhaust systems every 100 hours of operation. A squirt on the shaft and "exercise" the valve with a wrench would do it. The wastegate operates similarly to the flapper valve in our bikes. I haven't seen any maintenance schedule for the flapper yet.

Frank

https://www.ukgser.com/forums/showthread...or-is-it-solved

The valve is for the drive by sound compliance test, when you start your bike the first few fires are loud through the silencer, that's because the default not running state is open, it closes as soon as it gets to tick over, the damper valve reduces the sound and will stay partially shut until full power is required.


Ged

Mind you, according to this it is vague

An exhaust servo motor is one component of the exhaust valve system ... all Honda, Kawasaki, Yamaha, Suzuki, BMW, Ducati, Triumph and a few others. ... the true purpose of the exup valves is to meet noise and emissions regulations.

Zitat von boxter im Beitrag #11

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when you start your bike the first few fires are loud through the silencer, that's because the default not running state is open

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