Butterfly Valve - Exhaust Valve - Exhaust Flapper - Sticking or Seized Valve - Delete BMW R1250GS/A

Remove the cables , which than makes it easy to work the flap back and forth with fingers . Flood the top spring with copper grease and massage grease into the bottom swivel . Eventually it’ll be like new .
Don’t turn ignition on whilst cables disconnected or may get a fault code . ( I can’t remember if it’ll self clear thereafter or not )
That’s what an independent BMW mechanic did to mine when it failed. Stuck the flap in the middle and disconnected the cables. Worked fine after that, no message on dash. Left it like it was when I traded it in.
 
That’s what an independent BMW mechanic did to mine when it failed. Stuck the flap in the middle and disconnected the cables. Worked fine after that, no message on dash. Left it like it was when I traded it in.
That works on earlier 1200, but the 1250s now throw a fault code on the dash, which earlier bikes didn't. You used to just get a fault code on the ecu. The only way is to fit a box that fools the ecu.
 
Mine is all fixed now. Working like new. It also gave me a chance to give the Akro a proper clean!

I’m just waiting for a new exhaust clamp to completely finish the job.
 
Mine is all fixed now. Working like new. It also gave me a chance to give the Akro a proper clean!

I’m just waiting for a new exhaust clamp to completely finish the job.
Your post made me clean and stick some graphite grease on mine today (I'm one of the lucky ones who had it replaced under warranty)
 
These things have been a constant pain for me.
My last GS1250 had new headers at end of first year and seized up regularly over the next 25k.I did get good at sorting it myself,

My new GS1250 had a Mudsling from new which I strongly recommend it really does cut down on the valve getting covered in crud, which is the main cause. Your pillion will also benefit, it should be fitted as standard if you've no intension of serious off roading.
 
Cotswold BMW carry a stock of replacement headers all the time.
Contact BMW as it’s a known issue and the have a goodwill system for this exact fault in place.
You pay the workshop time, they pay for the headers.
Newer versions have the cam on the bottom.
You can drill a 4mm hole into the bottom bush and grease from there. It allows the condensation to clear which is the cause of the problem.
 
These things have been a constant pain for me.
My last GS1250 had new headers at end of first year and seized up regularly over the next 25k.I did get good at sorting it myself,

My new GS1250 had a Mudsling from new which I strongly recommend it really does cut down on the valve getting covered in crud, which is the main cause. Your pillion will also benefit, it should be fitted as standard if you've no intension of serious off roading.
It’s internal condensation that’s the cause as it settles in the bottom bush and can’t escape.
 


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