Fork Stanchion recall?

[Pauly S]

Why is everyone being so defensive about this issue? like its a personal insult the bike may have an inherent design floor. The facts are, that people have had crashes due to stanchion failures and the bike should be checked and rectified if it cant be used as intended. BMW promote off roading the GS with the off road school, the GS Trophy and the 'spirit of GS' videos where the new rally is ragged around various off road situations in various countries. Not to mentioned, is sold as a world crosser. So yeah if a tosser jumps a bike and the forks break or they land a wheelie badly and the forks break thats wrong. totally wrong.

Nail, hammer, and hit. well said.

 

[rml]

And if it fails, perhaps between your unscheduled, random, unapproved casual "inspections" , and you end up in a wheelchair or dead ....?,

Just going to leave this link here:

http://www.3ca.com.au/sharks-toilets-cheerleaders-statistics/

So beware those placemats dangerous I tells ye.

 

[Edmund Kean]

I'm certainly far from being an engineer but just looking at the telelever design, what significant forces are there which would cause the area in question to fail?

Aren't sideways forces from the wheel up handled by the rigidity of the telelever wisbone?

Aren't braking forces handled by the wishbone and the front suspension unit?

Is there really much force from the sliding motion of the fork in extension?

It does appear and odd design when a better one is known and used widely and it perplexes me to think why would they do that. However and forgive me if it's already been said...

Surely the most concerning force would be that from a heavy drop. A significant force at the bars would be a concern to check upon before riding on.

It would be good to hear from an engineer...

Ed

 

[fredaroony]

The fix...

 

[XPilot]

All this paranoia is really, really scary....

 

[roadrunner]

Tools required by dealer to carry out repair

 

[GSTourer]

https://www.dropbox.com/s/n7ehlucgydqhhwk/31_001_17_Fixed_Fork_Tube_Inspection[819b5823].pdf?dl=0

 

[roadrunner]

Makes sense now I see the tool.

 

[Engineer]

Exactly.

(though it is the same moronic, prolific, poster who seems to have some kind of "loyalty " to the GS)

The cerebrally challenged "engineer" (though he is nothing of the sort) ... can't fathom why BMW respond with differing vigour in differing markets. ( for the identical bikes)

You are back with your idiotic ways I see, I do wonder what your psychological problems really are?, do you know? - but we all love you for your entertainment value - please keep it up.

 

[Engineer]

Tools required by dealer to carry out repair

Thanks for that post - very useful.

 

[Engineer]

I'm certainly far from being an engineer but just looking at the telelever design, what significant forces are there which would cause the area in question to fail?

Aren't sideways forces from the wheel up handled by the rigidity of the telelever wisbone?

Aren't braking forces handled by the wishbone and the front suspension unit?

Is there really much force from the sliding motion of the fork in extension?

It does appear and odd design when a better one is known and used widely and it perplexes me to think why would they do that. However and forgive me if it's already been said...

Surely the most concerning force would be that from a heavy drop. A significant force at the bars would be a concern to check upon before riding on.

It would be good to hear from an engineer...

Ed

I am sure that there are some motorcycle suspension engineers who could offer a general view on this - but only the BMW and/or Marzocchi designer engineers are going to have all the necessary details to give a definitive answer to your questions - unfortunately I doubt whether they would be allowed to tell you.

 

[patzx12]

This one appears to come apart in a shunt,

http://www.ebay.co.uk/itm/2015-BMW-...e=STRK:MEBIDX:IT&_trksid=p2060353.m1438.l2649

 

[ymfb]

My bike is booked for it's 12,000 mile service in a months time and I'm assured this is an inspection that is being carried out on all GSs, no mention of a recall. It seems only to be effecting bikes that are ridden off road.

I will keep a watch out for leaks, but none expected.

 

[Zx9man]

I was told that my 2017 GSA was not on a recall by bahnstomer Alton but I think they are blagging me as cw said just the opposite

 

[Traffic893]

My bike is booked for it's 12,000 mile service in a months time and I'm assured this is an inspection that is being carried out on all GSs, no mention of a recall. It seems only to be effecting bikes that are ridden off road.

I will keep a watch out for leaks, but none expected.

But would you be happy,even if you know you won't ride off road, but at the end of the day that's what it's designed for.

 

[DC]

But would you be happy,even if you know you won't ride off road, but at the end of the day that's what it's designed for.

How do the dealers know if your bike is being ridden off road ? just tell them it is an await a reply

 

[crotchrocket]

I'm certainly far from being an engineer but just looking at the telelever design, what significant forces are there which would cause the area in question to fail?

Aren't sideways forces from the wheel up handled by the rigidity of the telelever wisbone?

Aren't braking forces handled by the wishbone and the front suspension unit?

Is there really much force from the sliding motion of the fork in extension?

It does appear and odd design when a better one is known and used widely and it perplexes me to think why would they do that. However and forgive me if it's already been said...

Surely the most concerning force would be that from a heavy drop. A significant force at the bars would be a concern to check upon before riding on.

It would be good to hear from an engineer...

Ed

The connection from the forks, at the bottom yoke to the wishbone is a ball joint so all twist / directional forces are transferred at that pivot point to the top yoke.

 

[patzx12]

I'm certainly far from being an engineer but just looking at the telelever design, what significant forces are there which would cause the area in question to fail?

Aren't sideways forces from the wheel up handled by the rigidity of the telelever wisbone?

Aren't braking forces handled by the wishbone and the front suspension unit?

Is there really much force from the sliding motion of the fork in extension?

It does appear and odd design when a better one is known and used widely and it perplexes me to think why would they do that. However and forgive me if it's already been said...

Surely the most concerning force would be that from a heavy drop. A significant force at the bars would be a concern to check upon before riding on.

It would be good to hear from an engineer...

Ed

You are correct, the fork tubes are not load bearing the ball joint and wishbone take all the load BUT the fork stanchions hold the wheel in place.
If our bikes are involved in a frontal shunt and the stanchions break the bike collapses.
A conventional forked bike would take much more of a frontal force before the fork tubes break.

 

[Edmund Kean]

The connection from the forks, at the bottom yoke to the wishbone is a ball joint so all twist / directional forces are transferred at that pivot point to the top yoke.

I can see that, thanks for pointing that out.

I wonder if other variants of the R1200 have a similar/the same arrangement as the GS?

 

[patzx12]

Like this Portugese fix for the problem

That just moves the problem down by 30mm. an outer clamp would be better.