My First 2014 Problem (Final Drive oil Leak)

Wistrick

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avc8130 said:
My guess is going to be that they used the pinch bolt to hold the axle while tightening the nut on the axle causing a misalignment and subsequent side load on the pumpkin.

ac
so how do you keep it from turning with out use of the pinch bolt...only ask cause I am getting ready for my first rear tire change

Dan
 

markjenn

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Wistrick said:
what if you use the pinch bolt to hold it and then released it and re torqued it
This probably would be fine, but you're still loading/bending the swingarm the first time you torque the axle nut with the axle not sitting in its final "at rest", "no load" position in the right swingarm. It's really a bit of a complex system as the compression load on the axle is going to initially start compressing the swingarm until the slack is taken up and the bearing spacers start taking the load. If you're really far off, you might need to go through several cycles to relax the stress on the swingarm.

Some say this is very important, others scoff it off. Safest thing is to follow Yamaha's directions and use the proper wrench to get the axle torque right, then do the pinch bolt. You're going to need a 19mm allen anyway as it is required to loosen/tighten the front axle. (The front axle also has a pinch bolt, but you set final torque by torquing the axle into the fixed left fork leg - there is no separate nut on the left side so you can't use the pinch bolt to hold the axle.)

I'm unsure how this problem would affect seal integrity, but haven't looked at it closely.

- Mark
 

avc8130

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markjenn said:
This probably would be fine, but you're still loading/bending the swingarm the first time you torque the axle nut with the axle not sitting in its final "at rest", "no load" position in the right swingarm. It's really a bit of a complex system as the compression load on the axle is going to initially start compressing the swingarm until the slack is taken up and the bearing spacers start taking the load. If you're really far off, you might need to go through several cycles to relax the stress on the swingarm.

Some say this is very important, others scoff it off. Safest thing is to follow Yamaha's directions and use the proper wrench to get the axle torque right, then do the pinch bolt. You're going to need a 19mm allen anyway as it is required to loosen/tighten the front axle. (The front axle also has a pinch bolt, but you set final torque by torquing the axle into the fixed left fork leg - there is no separate nut on the left side so you can't use the pinch bolt to hold the axle.)

I'm unsure how this problem would affect seal integrity, but haven't looked at it closely.

- Mark
Mark,

Good advice.

I'm not positive on the seal integrity either, but I didn't really see any other way to assemble the rear axle wrong.

If the pinch bolt is used, the swingarm is squeezed together and the axle is no longer parallel to the swingarm pivot. This theoretically puts a load on the bearings and seals in the drive.

ac
 

MGB

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All I can think when I read these final drive link threads is at least it's not a catostrophic failure!! I take a leaking drive over a "can't ride any further" failure anyday.

Been there, done that with another brand. :(

Good thought on the propert way to install the rear wheel....
 

snakebitten

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Mine has been leaking-oozing-gettinsticky for a very long time. It sometimes seems to stop, but that's probably just because I've cleaned the swing arm off and there isn't any dust to contrast with.

Regardless, there is never a measurable amount missing from the housing. I ride. I wonder. I check from time to time.
 

trikepilot

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Mzee said:
I took the bike to the local Yamaha mechanic and a new seal installed. It was done in about 30 minutes. The bike is running like new.
Mzee - this is good to hear as I am having the same issue at 15k miles. Weeping from the seal inside the pumpkin next to the splines. You can see the drip at about 6 o'clock in the pic. After two days it filled up a beer bottle cap and then some. So it is not a huge leak but enough to make a mess of a tire on a trip and need to be watched so that you don't run it dry.



Took the pic by my local dealer - the same one that warranteed the swingarm issue - and he was shocked. He said he had never heard of a Tenere shaft drive leak. He said to bring it by and they would get it fixed up under my YES.
 

jimsgone

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The upside is that it's a messy failure, in which only a little fluid makes a mess and you will be hard pressed to miss it. It's not a sudden catastrophic failure, as in some other brand that gets bashed regularly.

and that's one of the big reasons i no longer ride the GS's !! ::010::
 

markjenn

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jimsgone said:
It's not a sudden catastrophic failure, as in some other brand that gets bashed regularly.
To be fair, most of the "final drive failures" on the BMWs are oil seal leaks also. They just happen with more frequency.

- Mark
 

justbob

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The BMW final drive failures that I am personally familiar with were bearing failures that also caused a then misaligned seal to leak.
The bearing caused the seal problem, the seal did not cause the bearing problem, at least in the ones I am familiar with.
 

Big Blu

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markjenn said:
To be fair, most of the "final drive failures" on the BMWs are oil seal leaks also. They just happen with more frequency.

- Mark
More frequently, really? Ya got any hard numbers to support that statement?
There may be more incidents of failures on BMW's but there are many, many, many more of them on the road, no?

Perhaps it's the ST that has a higher rate of oil seal failures, and for sure fork seal failures. Miles and age will present the flaws and weakness of any product, let's see how the ST fairs in the long run. There have been reports also of frame cracks..... Oh my the shy is falling!!! Sell all ST's, sit at home, no need to worry about a any motorcycle related failure...period! ::025:: ::025::

Oh, I almost forgot the excessive clutch vibration causing many to upgrade the clutch basket, oh my what is one to do! Sell I say, sell now before it's too late.... Or ::021::


Paul
 

justbob

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According to the statistics I have read, BMW motorcycles sales only account for about 2% to 3% of the total U.S. motorcycle sales.
 

Jackal

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justbob said:
The BMW final drive failures that I am personally familiar with were bearing failures that also caused a then misaligned seal to leak.
The bearing caused the seal problem, the seal did not cause the bearing problem, at least in the ones I am familiar with.
Agree 100% on this one,
 

longride

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Big Blu said:
More frequently, really? Ya got any hard numbers to support that statement?
There may be more incidents of failures on BMW's but there are many, many, many more of them on the road, no?

Perhaps it's the ST that has a higher rate of oil seal failures, and for sure fork seal failures. Miles and age will present the flaws and weakness of any product, let's see how the ST fairs in the long run. There have been reports also of frame cracks..... Oh my the shy is falling!!! Sell all ST's, sit at home, no need to worry about a any motorcycle related failure...period! ::025:: ::025::

Oh, I almost forgot the excessive clutch vibration causing many to upgrade the clutch basket, oh my what is one to do! Sell I say, sell now before it's too late.... Or ::021::

Paul

I don't think anyone but you should sell their S10. Seriously.
 

Big Blu

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justbob said:
According to the statistics I have read, BMW motorcycles sales only account for about 2% to 3% of the total U.S. motorcycle sales.
Please share the source of those statics.
Also, how many GS's have been sold world wide since it's inception? How many ST have been sold world wide since it's inception?

You might find this interesting, or not.

https://www.press.bmwgroup.com/global/pressDetail.html?title=bmw-motorrad-achieves-third-all-time-sales-high-in-succession-in-2013-most-successful-year-in-the&outputChannelId=6&id=T0163827EN&left_menu_item=node__804

Some facts here:
http://www.webbikeworld.com/motorcycle-news/statistics/motorcycle-sales-statistics.htm

Paul
 

Koinz

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justbob said:
The BMW final drive failures that I am personally familiar with were bearing failures that also caused a then misaligned seal to leak.
The bearing caused the seal problem, the seal did not cause the bearing problem, at least in the ones I am familiar with.
The majority of the issues I heard about were related to incorrect shim spacing (preload) of the main bearing. That's what was causing the bearing to fail.
I have heard people replace the bearing and not set it up correctly only to find that final drive failing shortly after again.

On Final Drives that are setup correctly, they last many thousands of miles. Something has to cause the bearing to fail.

Let's not kid ourselves - All bikes have their quirks. I love them all ;D ::001::
 

Checkswrecks

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Maybe I am missing what you are trying to say.
It looks like you were challenging justbob to show you the source of his data, as if the 2-3% figure might be incorrect. But then your links (which agree with others) provide the following numbers to support his 3% figure. By what BMW and Rick (WbW) provide:


14100 BMW US sales/458972 total US sales =
Accounting for ALL models, BMW had 3% share of the total US market.

The GS sold 30,000 units last year, world-wide. As I remember they sold about 2:1 to the Teneres.

Big Blu said:
Please share the source of those statics.
Also, how many GS's have been sold world wide since it's inception? How many ST have been sold world wide since it's inception?

You might find this interesting, or not.

https://www.press.bmwgroup.com/global/pressDetail.html?title=bmw-motorrad-achieves-third-all-time-sales-high-in-succession-in-2013-most-successful-year-in-the&outputChannelId=6&id=T0163827EN&left_menu_item=node__804

Some facts here:
http://www.webbikeworld.com/motorcycle-news/statistics/motorcycle-sales-statistics.htm

Paul
 
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