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Old 04-05-2012, 02:04 AM   #46
luca9277
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Hey Jaymboze,
let me know how it goes with the new oil, I may just do the same myself.
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Old 04-05-2012, 05:47 PM   #47
jaymboze
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Hi all,
Well, I put the 85W140 oil in and fired it up on the centre stand, and the bloody noise is still there...!
Pull the clutch in and it disappears, as it did with the thinner oil.
Have not had a chance to ride it yet, so not sure if the vibration I was getting will be minimized, but I doubt it...!
I was hoping that it would be a cheap fix (wishful thinking on my part ), but the problem is obviously more serious, with the culprit being hidden inside the box.
My gut feeling is the splines.

As for the thicker box oil, the mechanic says it will be harder to change into 2nd gear when the oil is cold, but is fine once it warms up after a 5 minute ride.
He has other customers who actually prefer the way it shifts gears with the thicker oil.

Will keep you posted.
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Old 04-05-2012, 07:25 PM   #48
Lensgrinder
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My 2008 GS developed the clutch rattle as well, just as others described.
Pull clutch in noise goes away, let it out it rattles.

Mine has 32,000 miles, but is six months out of warranty.
I may talk to the dealer to see what they have to say.
Richard
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Lensgrinder screwed with this post 04-07-2012 at 08:14 AM Reason: typo
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Old 04-06-2012, 08:45 PM   #49
jaymboze
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Hi all,
First ride today with the thicker oil in the box , and althought the clutch rattle noise is still apparent, the actual gearbox seems a lot quieter when riding and the gearchanges feel smoother...!
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Old 04-06-2012, 09:18 PM   #50
funsummer
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great thread and info guys.
I have a 2009 gsa with 18 thousand km and my clutch is now very noisy.
The clutch has had a hard time with some sand riding.
Gear changes from 1st to second are very hard and clunky.
I really hope that my shaft splines are just very dry and binding up the plate.
Anyone else had similar gear change issues?
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Old 04-07-2012, 02:02 PM   #51
jaymboze
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Question

Hi all,
One other thing I was told by the mechanic is that these single plate dry clutches we have in our GS's should not be slipped at all, but rather ridden in a manner that has it fully engaged or disengaged, as the heat produced when slipping the clutch tends to fry them fairly quickly...!
This seems to be the exact opposite of what I have been led to believe since many of the off-road riding techniques envolve slipping the clutch to some degree ( hill starts etc...)...?
Has anyone had experience with using a ceramic clutch for mainly road riding, as I believe they are fairly abrupt...?
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Old 04-11-2012, 12:52 PM   #52
Lensgrinder
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When replacing the clutch plate, do we also replace both the cover plate and pressure plate, or just the pressure plate?

I might be looking at having to replace the clutch as well, so I want to make sure I do it right.

Thanks,
Richard
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Old 04-16-2012, 07:49 AM   #53
Lensgrinder
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Follow Up

I replaced the clutch assembly this past weekend.
It quieted the noise down, but it's still there.
I also replaced the rear main seal and the counter balance seal.
It does seem to shift better, probably the gear oil.

I now believe it is probably what was posted earlier about being in the gearbox.
I probably should have opened the gearbox up.
Will look into that later, for now I put in Bell-Ray 85w-140.
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Old 04-26-2012, 07:27 PM   #54
Lensgrinder
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Well, I decided to pull the rear subframe again.
I'm glad I did as the input shaft and bearings need replacing.
The gear oil I put in two weeks ago was completley black.
So, you might want to check your gear oil for excessive metal in it.

In my opinion, just putting a heavier oil in is like putting a band aid on a bullet hole, it is eventually going to strand you.

Mine happened six months out of warranty with 33,200 miles, but BMW agreed to pay for half.

My thanks to Rick at BMW motorcycles of Escondido for getting this for me.
Richard
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Old 04-27-2012, 07:18 AM   #55
mouthfulloflake
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just a thought.

ive had this noise for a few years, clutch lever out, rattle LOUD when warm

I did a TB synch yesterday, got them really close at idle, and even closer everywhere else.
that clutch rattle noise is greatly reduced now.
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Old 04-29-2012, 10:12 PM   #56
Lensgrinder
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After talking to one of the techs, he told me he had seen several of these.

What happens is the compression spring on the input shaft applies too much pressure on one side and breaks the retainer.

The input shaft has been updated in 2007, but some how I ended up with one. Lucky me.

If you continue to run it as is with the noise, your transmission will eventually grenade.
It's not good news, but it's better to be informed than guess.
Richard
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Old 05-11-2012, 09:04 AM   #57
Lensgrinder
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After transmission rebuild, (new input shaft, bearings and seals), I averaged 44.521 mpg on the first full tank of fuel.
before the rebuild it was around 39 to 40 mpg.
Richard
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Old 06-01-2012, 02:44 AM   #58
luca9277
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I brought my GS to the BMW dealer and it looks like the clutch friction plate has some play on the gearbox input shaft splines, and is worn, so it will be replaced.

However, the major cause of the engine rattle in N when the clutch is not engaged is from the gearbox input shaft.

On disassembling the gearbox they’ve found fragments of metal picked up by the magnet inside the gearbox, from the input shaft bearing housing.

So that will be changed too and the total is 2800 Australian $.

The guys @ BMW have sent a request for goodwill assistance to BMW hoping to get some discount on the parts, my bike is a 2008 so out of warranty but the shaft should last longer than 40K Km..

If I don't get a penny I am sure I will be looking at BMW and its service network under a whole new light...
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Old 06-01-2012, 06:35 AM   #59
mouthfulloflake
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I was pushing the bike out of the driveway yesterday, and had the bike in gear with the clutch in, and the trans is NOISY

so yeah, I am pretty convinced it is the input shaft bearing, one or more of them at least.

I need to undercut the drive dogs anyway, or procure a M97 shaft.
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Old 06-01-2012, 09:06 AM   #60
Motzilla
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would Moly in the trans oil help?

Has anyone tried adding moly to the transmission oil to reduce the rattle?
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