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Old 10-05-2013, 01:50 PM   #61
JimVonBaden
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I am fully aware of the construction of the final drive. I also know when the big bearing starts to go the seal on the bearing itself also goes allowing contaminants into the FD which show up if you change the oil. You also get slop in the FD, and sometimes the slow causes the other seals to go bad. There are relationships among all modes of failure.

Not changing the oil may or may not "cause" a failure, depending on what is failing, but it will certainly help you remain ignorant of the impending failure if you decide changing the oil is useless.

Jim
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Old 10-06-2013, 01:57 PM   #62
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On closer inspection (I've been sick, so still haven't pulled the wheel and brake to examine) there is more different.
The silver flange that holds the brake disk seems to be replaced by something else much smaller. I'll need to pull the wheel to be sure.

Also, there is a black plate with a big rubber boot. When I tried to remove the boot, a plastic plug came out. What is this? Is it the vent I've heard about? Seems really poor for any sort of water crossing or even heavy rain f so. I tried searching for final drive differences but no such luck. Sorry if it's a dumb question.

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Old 10-06-2013, 04:22 PM   #63
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You should also have a fill plug near the sensor hole. The brake rotor flange is made out of steel instead of alum. no more cracking. Mine didn't have the vent installed. Should be good for many miles of adventure riding.
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Old 10-07-2013, 04:16 AM   #64
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[QUOTE=trc.rhubarb;22485479]New FD was in stock due to a mis-order so I just lucked out! I now have a drain at 6 o'clock rather than 9 but all else looks the same[QUOTE]

Quote:
Originally Posted by trc.rhubarb View Post
So I'm looking at the part number they quoted and something isn't adding up.
It doesn't seem to be correct for my bike. Does someone that understands this stuff better know if this is a correct fitment? For reference: 33117705744

Well, if it works OK, great!!

Max BMW part fiche sez part numbers for R1200GSA (06-07) are...

33 11 7 705 744 - FINAL DRIVE, SILVER - I=31:11=2,82 (from 08/06), but.... 33117705744 was superseded by 33118521838.

33 11 8 521 838 - RIGHT-ANGLE GEARBOX WITH VENT, SILVER - I=31:11=2,82 (from 08/06)

Only thing I can figure is they gave you the updated FD, but quoted the old FD on the invoice.
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Old 10-07-2013, 08:19 AM   #65
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Only thing I can figure is they gave you the updated FD, but quoted the old FD on the invoice.
I think the same thing as well. Bike runs well, has a new FD that seems to work properly, so I'm happy. I don't suppose there would be a part number stamped somewhere on it?

Still confused by that rubber piece but maybe that is the vent I've heard about. I'll have to go check out a newer GS and see if it has one.
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Old 10-07-2013, 08:20 AM   #66
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Quote:
Originally Posted by trc.rhubarb View Post
I think the same thing as well. Bike runs well, has a new FD that seems to work properly, so I'm happy. I don't suppose there would be a part number stamped somewhere on it?

Still confused by that rubber piece but maybe that is the vent I've heard about. I'll have to go check out a newer GS and see if it has one.
That is a vent. They came on late 2010 bikes.

Jim
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Old 10-11-2013, 12:29 PM   #67
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Well, I got a double whammy this year. I've been riding BMW's for 15 years and never touched a final drive until this year. First, on my 07 GT with 27k miles and now on my GSA with 65K miles. The big bearing was shot on my GT and I'm hoping it's just the big bearing on my GSA. Oil changed every 6k, which of course, doesn't make a difference being a sealed bearing. It comes down to crap design and the wrong bearing for the job. I'm starting to develop a love hate relationship for these bikes. LOL
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Old 10-11-2013, 02:55 PM   #68
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My new final drive came with the vent and the newer cast brake flange.
Like below.



Step by step rebuild by ElGringo Click here





I think ElGringo quit riding after the rebuild so no updates on how it is holding up.
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Old 10-11-2013, 03:19 PM   #69
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FD porn

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Old 10-12-2013, 12:06 AM   #70
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Quote:
Originally Posted by mini151 View Post
So..enough final drives, to keep one bike rideable, for one year..brilliant..










...
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Old 10-12-2013, 03:51 AM   #71
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One would think that after all of the years that BMW has been building these final drive units by now they would be bullet proof. Apparently BMW does not want to famous for reliable bikes. A o-ring chain drive may offer more peace of mind and be less money and hassle than these FD's to maintain. BMW bikes are too expensive to be having all of the problems i have been reading about.
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Old 10-12-2013, 07:56 AM   #72
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64k miles, and what failed was effectively a wheel bearing and unfortunately as a bit of a fluke, it took out the axle with ring gear. I see I can get a new axle for about 600ish and a bearing cant be more than $50. The repair itself looks easy enough but maybe a little time consuming. Had it been my money, Ebay would have hooked me up with a new FD for about 650 and if it was just a bearing, I could have fixed my own and resold the original on ebay after being out a few hours and $50 + shipping costs.

How many chains/sprockets would you buy in that same mileage on a heavy 1200cc bike? If I took the HD the places the GS has gone, that rubber/Kevlar belt would be toast along with both sprockets. Still a lot cheaper on the surface but the parts are then thrown away rather than reusable.

Assuming you paid a shop to replace the chain/sprockets 3 times at $300ish for parts + 1h labort for $400 a pop, you are in for $1200. My quote to fix, until the axle was caught, was I think about $600 which is less than what they originally told me it would be to rebuild.
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trc.rhubarb screwed with this post 10-12-2013 at 08:02 AM
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Old 10-12-2013, 09:25 PM   #73
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Quote:
Originally Posted by trc.rhubarb View Post
64k miles, and what failed was effectively a wheel bearing and unfortunately as a bit of a fluke, it took out the axle with ring gear. I see I can get a new axle for about 600ish and a bearing cant be more than $50. The repair itself looks easy enough but maybe a little time consuming. Had it been my money, Ebay would have hooked me up with a new FD for about 650 and if it was just a bearing, I could have fixed my own and resold the original on ebay after being out a few hours and $50 + shipping costs.

How many chains/sprockets would you buy in that same mileage on a heavy 1200cc bike? If I took the HD the places the GS has gone, that rubber/Kevlar belt would be toast along with both sprockets. Still a lot cheaper on the surface but the parts are then thrown away rather than reusable.

Assuming you paid a shop to replace the chain/sprockets 3 times at $300ish for parts + 1h labort for $400 a pop, you are in for $1200. My quote to fix, until the axle was caught, was I think about $600 which is less than what they originally told me it would be to rebuild.
Detailed repair, click below. Looks very time consuming
http://advrider.com/forums/showthrea...5#post15784265

Then what if it doesn't hold up as many have not. You are out about $800 in parts and your labor then you need to spend $2200 to buy a new one.

Maybe 80% of the GSs are only driven to Starbucks so BMW thinks all the failures are from extreme riders abusing their machines.

I don't think BMW should be let off the hook. Final drive failure is an unplanned unexpected failure. Why have they modified the final drive 3 or 4 times since 2008 alone? Maybe an enclosed Kevlar belt is what BMW needs.
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Old 10-13-2013, 08:50 AM   #74
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I'm going to have to agree. It's a poor design. It has nothing to do with oil changes or abuse IMO. It's just the wrong bearing for the job. As for trying to compare it to chains, that's not a fair comparison. I'd compare it to other shaft drives. How many FJR final drive failures have their been? I can't even think of one. BMW should just have somebody like Eaton or somebody else design it. I love these bikes, but seesh, thank god the rear end is somewhat serviceable.
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Old 10-13-2013, 12:53 PM   #75
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Quote:
Originally Posted by mini151 View Post
Repeat after me;
There is no final drive problem, BMW is the best.
There is no final drive problem, BMW is the best.
There is no final drive problem, BMW is the best.
There is no final drive problem, BMW is the best.
There is no final drive problem, BMW is the best.
There is no final drive problem, BMW is the best.
There is no final drive problem, BMW is the best.
There is no final drive problem, BMW is the best.
There is no final drive problem, BMW is the best.
There is no final drive problem, BMW is the best.
There is no final drive problem, BMW is the best.


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