Front rattling noise - Page 2 - BMW R1200GS Forum : R1200 GS Forums
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post #11 of 19 (permalink) Old 11-Aug-2018, 10:22 AM (640) Thread Starter
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Well, not good news here. On vacation and problem is definitely still there, just hardly noticeable whilst riding solo. It seems to occur in the following conditions :
- bike is warm (in fact, it possibly heats up more than it used to - but that remains to e checked)
- fully loaded with passenger triggers the problem
- it actually happens around 4000rpm,not before.
- it happens especially during hill climbing (ie, with passenger, under load)
It sounds like a chain rattling against something or something similar.
What an earth could this be ?
No other abnormal symptoms. Oil level is fine, and fuel has been changed many times to sp98 high octane stuff. Pinging is not the issue. Also the sound doesn't match.
What could be slack or loose ? The bike only has 25000km but of course out of warranty and the local dealership is just awful.
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post #12 of 19 (permalink) Old 21-Aug-2018, 05:11 AM (424) Thread Starter
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Hi all,

Here goes with the video :

Password is the bike brand in upper case.

You can hear the weird clangy noises at 20 seconds, and at another occurrences, every time around 4000RPM.

Any ideas before I take to the dreaded garage?
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post #13 of 19 (permalink) Old 23-Aug-2018, 05:22 AM (432) Thread Starter
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Well this one seems to have everyone baffled! The mechanics too. Called a good mechanic, says he has no clue. He had worked on the bike and there was no camshaft wear or anything that could explain the noise. All there is at the front is the water pump and clutch so he is somewhat baffled.
Then went to the dealership. First thing they asked was if it sounded like metal being fatigued/stretched, which is a sign of a clutch problem, but that doesn't sound like it to me. They tried the bike, albeit on a short ride, couldn't reproduce the noise. They didn't hear anything abnormal. There again, I think the sound comes when the engine is nice and warm, possibly wasn't sufficient. Anyhow their conclusion was "drive and don't worry about it".
Time will tell, will let you know if this evolves in anyway. Thanks for your help.
Tony
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post #14 of 19 (permalink) Old 23-Aug-2018, 06:00 AM (458)
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Hi, I'm interested in knowing what it takes to resolve your issue. I have a 2017 GS that sounds like it it coming apart after it gets warmed up. Kind of sounds like marbles bouncing around a box. I have been told that these boxer engines tend to make noises that are not prominent in other type engine configurations. It could be that what the dealer told you was completely "normal" for this engine, don't know.

One thought...

Have you noticed any metallic shavings or sliver in your oil when you change it?

Also, it is strange that the noise is more prominent when riding two up than when solo. I see why you are confused.

Please keep us informed as to your progress.
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post #15 of 19 (permalink) Old 31-Aug-2018, 02:12 AM (300) Thread Starter
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Quote:
Originally Posted by db52282 View Post
Hi, I'm interested in knowing what it takes to resolve your issue. I have a 2017 GS that sounds like it it coming apart after it gets warmed up. Kind of sounds like marbles bouncing around a box. I have been told that these boxer engines tend to make noises that are not prominent in other type engine configurations. It could be that what the dealer told you was completely "normal" for this engine, don't know.

One thought...

Have you noticed any metallic shavings or sliver in your oil when you change it?

Also, it is strange that the noise is more prominent when riding two up than when solo. I see why you are confused.

Please keep us informed as to your progress.
Hi,

Yes will keep the forum updated with any news. Haven't the ridden the bike much lately, and generally don't ride that much, hence the slow progress on that issue My best guess is that the noise comes up behind the windshield. Doesn't seem to be from the cylinders. But there again it's hard to judge those things, and it's hard to stick your ear to the engine whilst driving. At the front are two main elements I can think of : water pump and clutch. But no idea how those would sound like a slack chain bouncing about.

Thanks for the idea it's a good thing to keep in mind. For the next service I'll take it to my favourite mechanic and ask him to check the oil for metallic shavings. Unlikely, but best check.

I know this engine sounds weird at best of times, but that noise seems particularly odd. The earplugs will fix it
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post #16 of 19 (permalink) Old 24-Nov-2018, 11:31 AM (730)
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Question Body Noise

Hi,
I get a lot of noises from the front of the bike (2017 Exclusive); some of it is tyre noise, but I think that there is also buzz from the plastic bits around the front of the bike. I need to do more research.
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post #17 of 19 (permalink) Old 25-May-2019, 05:45 PM (947)
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Did anyone ever figure this out ?
my bike has the exact same noise from the front of the engine, coming up between the forks ! it sounds horrible.
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post #18 of 19 (permalink) Old 26-May-2019, 03:32 AM (356)
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Likewise, keen to know if anyone’s hacked a solution to reduce the racket coming up the steering well.
Took a 2019 African Twin DCT for a test ride, today. The same Bridgestone A41’s although 21” and no where near the front end noise of the 1250GS. Tires alone are not the cause.
I reckon it is the type of plastic BMW uses, the concave design of the fairing and fender that funnels the sound to the riders’ helmet and all the nooks and crannies of plastic that amplify the sound.
In the old days, we used to bog holes with foam to stop mud from building up. Worth considering...or maybe just switch alliances.

Last edited by Gdoss; 26-May-2019 at 04:04 AM (378).
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post #19 of 19 (permalink) Old 03-Jun-2019, 08:17 AM (554) Thread Starter
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Hi all,

7000km later, and the problem is still there really.
The symptoms : something is rattling, sounds like something clinging in the engine. It has gotten louder and louder. It happens only on load, especially uphill fully loaded. It is not a regular noise. And interestingly, now it doesn't do it all of the time. At times, it doesn't happen at all.

I have no clue would could possibly be causing that. last weekend I rode 400km without a single occurrence in the day, and then, it started up again. I've tried fuel changes, oil change, valve ajustment is correct... And it's more or less loud.

I've checked screws, all sorts of things. Really, I'm baffled. I just keep on riding... Hopefully the noise will just end up disappearing (I thought it had this weekend, then it came back, but less pronounced).

Will keep you posted... But I'd love to know : what possibly could it be? I've ruled out small-end, big end, piston slap, pinging... Although I'm no expert none of those seem to coincide. Would the lose clutch noise coincide with the symptom? On load? Surely can't be a cam chain tensioner? Or could it? Does this thing has push rods that can come lose? Again, would that make sense? I'm open to any suggestions.

Apart from the odd noise I try to avoid (I go easy on her when the noise appears), it runs a fanstactically well...
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