Weird grinding sound on my GS12

  • Thread starter Thread starter stradaduck
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stradaduck

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Hi guys, I have recently discovered this 'problem; and hope u guys can throw some light :o

I had been riding my GS12 for exactly 17 mths now (13000km on the clock) and all had been smooth sailing till the last 2 weeks when I heard a strange grinding sound when I clutched in and glide into my carpark.

I may not describe the sound very well but hell..... I will just try. It sounded somewhat similar to when you turn the wheels of a chain driven bike..the sound of the chain grinding some sort like that. Its even audible with the helmet on and it always happen when you clutch in to glide to a stop.

Ok, thats the first part of it. Since discovering this sound, my friend told me that there is also a weird rattling sound when he tried to throttled up more. Yes, after hearing that, I also felt it :(

Not sure if I am oversensitive or what but it has became a little bit more pronounced since yesterday.

I had been advised by my friend to change the transmisson oil. Appreciate if you guys can give me some advice on how to go about it from here as my dealer here is not exactly a 'genius' :o
 
Sounds like it could be rear wheel drive bearing, if it sounds like a dry tight chain. Check for excessive play in the rear wheel, grab the wheel with hands at quater to 3 position and try to move the wheel from side to side, if so, warranty job.
 
shedracer said:
Sounds like it could be rear wheel bearing, if it sounds like a dry tight chain. Check for excessive play in the rear wheel, grab the wheel with hands at quater to 3 position and try to move the wheel from side to side, if so, warranty job.
Click to expand...

Thks Shed ! Now tat u mention, i sort of felt my rear wheel slipping when I bank in a bit hard.

Really appreciate the prompt reply :clap Will chk it soon and let you know :D

Any other opinions, guys ?
 
Went to my dealer today.... chk the bearings n confirm its ok. They claim that it shld have some free play. Is it true?

They mentioned taking out the clutch slave (dont exactly know the spelling) to chk. What are they checking for ?

Appreciate for some more opinions :o
 
That strange grating noise is nothing more than the sound of various lesser BMW GS owners grinding their teeth in envy at your wonderful GS :D
 
Wapping said:
That strange grating noise is nothing more than the sound of various lesser BMW GS owners grinding their teeth in envy at your wonderful GS :D
Click to expand...

Heh heh heh ..... I hope so ;) Went to get a second opinion from another bike shop n they too tell me its the rear wheel bearings :(

Well...... just have to insist on my dealer to take out the wheel for a check i guess :o

I just hope its really the bearings n not some other engine problems :eek:
 
rear wheel bearing problem

stradaduck said:
Heh heh heh ..... I hope so ;) Went to get a second opinion from another bike shop n they too tell me its the rear wheel bearings :(

Well...... just have to insist on my dealer to take out the wheel for a check i guess :o

I just hope its really the bearings n not some other engine problems :eek:
Click to expand...
hi stradaduck,
just wondered on the outcome of your 'grinding noise'? I had the same problem and it turned out to be the rear wheel bearing. But I'd be interested to know if it was something else in your case. I also heard a similar grinding - I thought it was the gearbox because the sound seemed to be emanating from thereabouts - but the gearchange seemed perfectly ok. This also tricked Marseilles BMW because they replaced the gearbox and driveshaft before I realized it was in fact the rear wheel bearing in Corfu. Screwed up my holiday somewhat.
 
Ok last time I had a weird noise on the 1200GS, it was a "tender de la chaine de transmission" that was blocked in one position. I have no idea how to translate that in English but let me explain how this issue happened. Each time I time I was opening the throttle, there was a weird metallic grating noise. They checked and found the problem right away.
If someone could be nice enough and translate the part in bold, that would help :o
 
The Machine Cat said:
Ok last time I had a weird noise on the 1200GS, it was a "tender de la chaine de transmission" that was blocked in one position. I have no idea how to translate that in English but let me explain how this issue happened. Each time I time I was opening the throttle, there was a weird metallic grating noise. They checked and found the problem right away.
If someone could be nice enough and translate the part in bold, that would help :o
Click to expand...

"tender de la chaine de transmission"

tighten the time chain ????
 
hokoboko said:
hi stradaduck,
just wondered on the outcome of your 'grinding noise'? I had the same problem and it turned out to be the rear wheel bearing. But I'd be interested to know if it was something else in your case. I also heard a similar grinding - I thought it was the gearbox because the sound seemed to be emanating from thereabouts - but the gearchange seemed perfectly ok. This also tricked Marseilles BMW because they replaced the gearbox and driveshaft before I realized it was in fact the rear wheel bearing in Corfu. Screwed up my holiday somewhat.
Click to expand...

Hi Hokoboko

Things have turned for the worst :( One month ago, my dealer insisted that it was just the transmission oil. They changed it n told me it was fine. Well, I took their words for it though the grating sound was still obvious.

Last week, I went for a trip. After 2800km and 800km away from home, i heard a really significant knocking sound from the rear together with some kind of grinding sound. The knocking was so bad that the 'knocks' could be felt on the handlebars and even my wife felt it on the pillion pegs. All these can only be felt in slow speed when I clutch in to roll to a stop and when I start moving off in gear. Once the speed increases, they cant be felt.

Now comes the strangest part, these symptons only appears when you do left turns and nothing on right turns. My dealer took out the bearings and found them to be ok. So, they tried to replace the rear axle. symptons were gone but the grating sound remains which they attributed to the gear box which is 'loose' when they are disengaged :confused: Is this true ?

Today I collected my bike and rode it for about 60km. The rear wheel just did not felt as smooth and when I pressured it on the left, there is a feeling of friction in the rear wheel. At a rest stop, I found the oil on the tires and discovered oil leaks from the bottom section of the axle.

Sorry guys, I may not have described the problems really well and I am also not technically inclined. Am I right to say tat I m experiencing final drive failure and can someone tell me if the grating sound may be due to the clutch or gearbox having problems? What are the symptons to look out for clutch and gearbox failures?

Thks guys !
 
Grinding - 06 GSA - might get stuck in Russia

Hi guys. Just read this old thread.
My 06 1200 GSA has 21000 miles.
I am currently on a tour in eastern europe , heading to Russia and Kazakhstan.

Grinding noise has been apparent for 2000 miles. Thought it was bearings but now concerned it might be engine. I get the grinding noise constantly at low speeds eg 4th gear, 2500 revs and then as I stop. It is rythmic, rotational grinding if that makes sense.

If it is the cam chain tensioner, stuck open etc as per above posts, how serious is it? Do i need this fixed asap? (it's been like it for 2000 miles) I am in Slovakia and heading east will leave me with fewer and fewer BMW mechanics to choose from!

(PS i am two up, fully loaded - breaking down in the Kazakh steppe is not an option, not least with the wife on the back!)
Dan
+447886698648
 
A stuck cam chain tensioner is going to make the timing chain thrash about on ONE side of the engine only. It'll make a metallic clattering/tapping noise like your valve clearances are way too big. It's hard to say how long you can run like this as it depends on how slack the timing chain can get with a stuck tensioner but you may get away with it for longer.

Engine noises will be engine speed related so they get louder/higher pitched as you rev' the engine. You should therefore hear them with the bike stopped and engine running in neutral.

Final drive and most transmission noises will be road speed related. When the grinding noise is happening then dip the clutch and see if the noise goes away, if it doesn't then it's transmission or wheel related.

Check the wheel bearings, check the brake pads are not down to the metal and there's not bits of rock jammed in the top of the caliper etc.

Good luck!
 
Grinding gone with no load/passenger?

I just popped out to go to a mechanic. First time on the bike without the passenger and the panniers. The grinding is hardly evident.

4th gear, 3000 revs, and 3rd gear 4000 revs - there is a grumble coming up through the bars and footpegs. It is this grumble which is accentuated under load (overloaded?)

Thanks for the advice directly above. After this unloaded ride I am beginning to realise it must be wheel bearing or shaft drive related.

The question is, if it is driveshaft related- what is the fix?
 
The drive shaft has a UJ at each end to allow for the movement of the suspension. At angles where the shaft is anything but in straight line from the gearbox the transmission of the torque from the gearbox isn't perfectly constant but pulses slightly as the UJ rotates. This is incidental but may explain why the grumbling noise you feel is different when the bike is unloaded as the suspension alignment may be more favourable without your passenger. The upshot is that the pulses may be creating the rhythmic grumbling noise in whatever is actually the root cause of the problem

It's unlikley your UJ is shot unless water got into the shaft and been in there a long time and rusted the bearings, I don't recall reading about failures but I'm sure someone will put me right. If you drop the final drive box down as if you were changing the oil (on a pre-drain plugged bike - do a search on final drive oil change) the UJ next to the final drive will present itself for inspection. It should have no play in it if you hold one 'half' and then try and move the other. If it has then the whole of the driveshaft will eventually need replacing. It's not a big deal other than putting hole in your wallet

More importantly, dropping the final drive will allow you to check the final drive shaft bearings. If the shaft that comes out of the final drive box moves from side to side then the inner bearing is on the way out.

As you can see from this excellent thread, it's not a roadside fix.

http://www.ukgser.com/forums/showthr...69#post1623869,

You still sure it's not wheel bearings?
 
Nippy Normans supply Touratech, Wunderlich, Desert Fox and many other makes of accessories.
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