I'm no mechanical engineer but if one exhaust is bluer than the other it indicates that it's getting hotter. Excessive heat will happen if the mixture is weak. Since modern fuelling systems have very little adjustment I guess the fuel injector is faulty and will need replacing, but I might be wrong.in my 1250 GSA the right exhaust header is completely blue7discolored, while the left one is still as new...different fuelling left/right?
My BMW R1250GS Left Cylinder Noise / Ticking. Can you send me a video clip that is distributed by BMW and one which I made myself and which was sent to BMW.I can send you a video clip that is distributed by BMW and one which I made myself and which was sent to BMW (I cannot put it on YouTube, however for privacy reasons).
Let me know your e-mail address by PM , so that I can send you a We-Transfer link.
Your BMW dealer is not telling the truth, by the way : BMW has sent a Puma to all dealers reg. this noise problem (which they consider present but harmless).
Sorry but what you say is BS.My thought, exactly. Even mildly twisting the throttle in 6th at 50 MPH is a recipe for lugging the engine. I'd expect to hear nasty rattling. Downshift first. I'm more likely to be in 4th gear at 50 MPH than 6th.
No, it's not pre ignition (pinking)! The R1250 boxer engine has been designed to run on poor quality petrol that one might find in the third world. Even when I use super unleaded it makes this strange engine noise when under light load.Sorry but what you say is BS.
At 50 mph you can give it full throttle and there will be or should be no 'noise'.
What you guys are hearing is likely pre-ignition.
I will make a separate post about what has happened to my 1250GS
deleted post as thought it was referring to 1200 engine Doh!I have noticed that my new R1250GS has a strange and unexpected engine noise.
It occurs when the engine is under load at all speeds and all gears. A typical circumstance - 50 mph in top gear when slightly opening the throttle there is a strange rattle/slight knock/grumble. It's always difficult to describe a mechanical sound but it's obviously fairly loud if I can hear it at 50 with a full face helmet and silicone ear plugs.
My dealer said 'it's still a new'.
My previous two water cooled 1200s never had this issue.
I will explain in more detail later but the NGK LMAR8AI-10 spark plugs BMW have fitted standard are too hot.No, it's not pre ignition (pinking)! The R1250 boxer engine has been designed to run on poor quality petrol that one might find in the third world. Even when I use super unleaded it makes this strange engine noise when under light load.
I am rather intrigued as what has happened to your 1250GS.
Please report back what you find.I will be definitely pulling my plugs for a look when I get home. The bike has 16000 on it and I believe it is still running the original plugs? It does have the dreaded 1250 rattle but I think I have got used to it now. I did get bmw to note my concern on it's service file for its 10000 service. If it is denotation I will be pursuing it vigorously with BMW. Years ago I had a brand new mercury 200hp outbound and it was eating platinum plugs around every 30 engine hours. Mercury denied there was a issue. Low and behold after about 6mths they did a recall and changed out the ecu on that model and the plug issue was no longer! My gut feeling is bmw know there is a issue but aren't acknowledging at the present time. Ford recently got ripped a new one for trying to fob off customers with the focus gearbox issue. The regulator fined them $10 million and directed them to put it right. Now they are going after several other brands who haven't provided a fit for purpose product. A lot of these big organisations will deny it until it starts to damage their reputation hoping the consumer will just go away.
Sent from my SM-N975F using Tapatalk