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Discussion Starter #1
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.

Any ideas?
 

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Discussion Starter #4
No, unless it is malfunctioning.
I tend to agree. Although the Shift Cam appears to make a quite a clunk when changing from one camshaft to the other (see/hear enzo5000's video) to make the noise I am hearing it would have to be shifting cams several thousand times a minute!

Bit of a mystery.
 

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Discussion Starter #7
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.
It makes the same noise when accelerating from 50mph in 4th, 5th or 6th!!!

Been doing some more research. Read a road test report where the author referred to a 'whirring mechanical sound'. This might be what I'm hearing. Could be a characteristic of the 1250 engine.

Matter of interest - does anyone on this Forum have a R1250GS? Perhaps there's a clue in the name, BMW R1200GS Forum?
 

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Discussion Starter #9
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.
At 50mph in 6th gear my R1250GS is revving at 2800rpm. Looking at various performance graphs at those revs it produces about 42 bhp and an astonishing 84 ft/lbs of torque.

With all that grunt I think 'lugging the engine' is never going to be an issue.

If only my 250 had as much power and grunt at maximum revs.
 

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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.
Couldn't be further from the truth. The 1250 has a bunch of torque and running in 6th at 50mph is perfectly normal and the bike accelerates quite well from there without any rattling. The shift indicator comes on well below 50 for the move from 5th to 6th.
 

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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.
Couldn't be further from the truth. The 1250 has a bunch of torque and running in 6th at 50mph is perfectly normal and the bike accelerates quite well from there without any rattling. The shift indicator comes on well below 50 for the move from 5th to 6th.
Agree with bmac. I’ve been surprised by how smooth my 1250hp can roll out of low speeds in high gears. Compared to my old 2004 1200 GS, which would let know when it wasn’t happy with my gear selection, and down shifting was the norm, the 1250’s a dream. But the engine is way noiser overall.
 

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66 years old and still 16
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Rattle

I get a rattle from mine when powering at low RPM but it is coming from exhaust headers as the gasses depart cylinder, occasional whirring from right cylinder head, am i worried, no, its BMW who should be worried:wink2:

I do find the GS very noisy from the holes where the fork's go down, but with rads on the side and a gulf of a gap at front its not surprising.

Good music drowns that, :smile2:

Ged
 

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Old Man on a Bike
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Maybe the throttle body butterflies; when you open them slowly (as in "rolling" on the throttle) sometimes they flutter a bit. The intakes are pretty exposed on the Boxer
 

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I get a rattle from mine when powering at low RPM but it is coming from exhaust headers as the gasses depart cylinder, occasional whirring from right cylinder head, am i worried, no, its BMW who should be worried<img src="http://www.r1200gs.info/forum/images/R1200GS_info_2015/smilies/tango_face_wink.png" border="0" alt="" title="Wink" class="inlineimg" />

I do find the GS very noisy from the holes where the fork's go down, but with rads on the side and a gulf of a gap at front its not surprising.

Good music drowns that, <img src="http://www.r1200gs.info/forum/images/R1200GS_info_2015/smilies/tango_face_smile.png" border="0" alt="" title="Smile" class="inlineimg" />

Ged
What is surprising is that BMW cannot design a quieter front end, but that’s for a different thread.
 

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Discussion Starter #17
Is it possible you got a tank of bad gas or are you using regular grade gas? Make sure you're not hearing pre-ignition/knock.

Ed
Doesn't sound like pre-ignition/knock or as I know it as - 'pinking'.

Apparently the R1250 can sense what the octane of the fuel that is being used and automatically make adjustments to prevent 'pinking' and engine damage regardless of fuel quality (I guess, up to a point). Useful in third world countries.
 

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I am living in Belgium and this R1250GS is my 9th 12XX GS in a row.
I am experiencing the same noise in identical circumstances.
At first my dealer in Belgium who delivered the bike to me didn't find anything wrong with this sound.
My FRENCH dealer however (i reside partly in France) who performed the first 1.000 kms service told me I was his 5th customer with these complaints.
Both dealers have sent an so-called puma-notice to BMW and await further instructions from the manufacturer.
My new bike performs splendidly but this irritating noise takes away some of my fun and pride.
 

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Discussion Starter #19
I am living in Belgium and this R1250GS is my 9th 12XX GS in a row.
I am experiencing the same noise in identical circumstances.
At first my dealer in Belgium who delivered the bike to me didn't find anything wrong with this sound.
My FRENCH dealer however (i reside partly in France) who performed the first 1.000 kms service told me I was his 5th customer with these complaints.
Both dealers have sent an so-called puma-notice to BMW and await further instructions from the manufacturer.
My new bike performs splendidly but this irritating noise takes away some of my fun and pride.
Pleased to hear I am not alone in experiencing this strange engine noise. I wonder if all 1250s make this noise or just a few of us? Rather surprised motorcycle journalists haven't noticed it. As I said before, having read a lot of reviews, only one journalist referred to a strange 'whirring mechanical sound' which may or not be what we are hearing. Hope our engines don't one day go 'bang'. All rather bizarre.
 

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I'm wondering if it's a shift cam solenoid getting stuck and causing it to switch cams repetitively.
 
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