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Old 07-16-2009, 07:39 PM   #1
johngil OP
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800GS shock bolt design flaw?

I have finally lost hope in this beast. Maybe after a few days and some wrenching, my attitude will change.
To me this is going to be the Achilles heel of my 800.



I feel as though I have been realistic w/ the capabilities of this bike. The improvements I have added have made a great bike even greater. Now this.
I will be lucky to get the brackets back to their original state. I would need another bike for comparison, but it looks like the cross tube that the tabs are welded to has a bow developing.
The bottom shock bolt is also slightly bent.
Needless to say, I'm not happy right now. The design just plain sucks here. I have never seen a shock bolt so long. What were they thinking? It appears the whole shock mounting bolt was designed around providing a mounting point for the seat locking mechanism.
I'm going to straighten things out, machine some new spacers for the shock and buy new bolts top and bottom.
From here on out, I think I'd better stay on the seat and keep the speeds down.
I'm calling bullshit on BMW's advertising and claims regarding this bike (for me).

If any of you encounter bent shock bolts, please contact me. I would appreciate it.


Yes, an Ohlins shock is pictured. The stocker bent the bolts too.

johngil screwed with this post 04-04-2010 at 12:06 PM
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Old 07-16-2009, 07:55 PM   #2
johngil OP
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Wasn't there someone here asking about a lowering kit?
Maybe I'm on to something.
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Old 07-16-2009, 08:47 PM   #3
Buffalo Bill
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Shouldn't have too.....

Hats off to ya man for being the engineer bmw should've been....Hope she works out...

I've been watching the 800, thinking about going from 1150 and a klr to something else...Couple friends are in the same boat, and they're closer than me to doing something....Both are leaning to the 800....Shit like this frickin pisses...

Couple more friends went the other way...KTM 990s...One loves it, the other has had some issues...Wouldn't be so bad if the damn things were'nt so expensive...

Bill
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Old 07-16-2009, 09:12 PM   #4
johngil OP
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I first suspected something was wrong when the rear wheel was a couple of inches higher than normal when on the centerstand.
I've never had a passenger, and even when fully loaded not been over 300 +/- pounds.
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Old 07-16-2009, 11:34 PM   #5
johngil OP
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Yeah, what he said.

I do own the world's largest crescent wrench. I'll have to fix things w/ that.

Math or no math, the bolt should be shorter like a regular bike.

No thread locking compound was present.

I would urge all of the 800 riders to check the bolt torque ASAP.

johngil screwed with this post 07-17-2009 at 02:52 PM
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Old 08-26-2009, 04:37 AM   #6
RedUly
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Quote:
Originally Posted by JoelWisman
Don't ask how this happened, in short it was not intentional and passenger has still not forgiven me.
Still sleeping on the couch?
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Old 08-26-2009, 05:52 AM   #7
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hey john, sorry to hear about the issues with the 800. one of the l.a. riders mentioned it last weekend and i just read through the thread. i know you're pretty far along with this but let me know if you need my bike for anything, pictures of a (hopefully, i haven't checked) non-bent shock bolt/ frame, etc.

dale
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Old 08-05-2009, 11:27 AM   #8
itsatdm
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Quote:
Originally Posted by johngil
I have finally lost hope in this beast. Maybe after a few days and some wrenching, my attitude will change.
To me this is going to be the Achilles heel of my 800.




Yes, an Ohlins shock is pictured. The stocker bent the bolts too.
I felt concerned enough about this to pull my shock bolt and luckily it is OK. The measurement I got between the mounting flanges was 2 3/4 in. The stock shock spacer is 1 3/8in and whole set up seemed to be a poor design. Then I pulled the rubber seat latch and noticed it too had a spacer. When the bolt is tighted to spec the two spacers butt up to one another and should provide a good reinforcement to the bolt. So not as bad as I thought.
I can see that if an aftermarket shock did not have a spacer as wide as the stock one, there would be no reinforcement for the bolt and it could bend which in turn could bend the crossmember.
For the stocker to do that, it looks like it had to be under a lot of pressure, had an improper spacer installed or a frame not to spec in width.

itsatdm screwed with this post 08-22-2009 at 09:39 AM
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Old 08-05-2009, 05:00 PM   #9
johngil OP
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Quote:
Originally Posted by itsatdm
I felt concerned enough about this to pull my shock bolt and luckily it is OK. The measurement I got between the mounting flanges was 2 3/4 in. The stock shock spacer is 1 3/8in and whole set up seemed to be a poor design. Then I pulled the rubber seat latch and noticed it too had a spacer. When the bolt is tighted to spec the two flanges butt up to one another and should provide a good reinforcement to the bolt. So not as bad as I thought.
I can see that if an aftermarket shock did not have a spacer as wide as the stock one, there would be no reinforcement for the bolt and it could bend which in turn could bend the crossmember.
For the stocker to do that, it looks like it had to be under a lot of pressure, had an improper spacer installed or a frame not to spec in width.
The Ohlins re-uses the stock spacer.
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Old 08-22-2009, 09:19 AM   #10
DockingPilot
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John, I just checked mine, well at least I eyeballed it. Its straight. To my eye anyway.
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Old 08-22-2009, 09:30 AM   #11
johngil OP
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Quote:
Originally Posted by DockingPilot
John, I just checked mine, well at least I eyeballed it. Its straight. To my eye anyway.
Do you have any photos of the top shock area of your aftermarket shock?
I'm interested in something Bruno T mentioned about the Ohlins spacer/bushings.
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Old 08-22-2009, 09:45 AM   #12
DockingPilot
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Ill tell ya what, since your a good guy, Ill go down and take off the cover again and take one.
Standby.........
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Old 08-22-2009, 10:05 AM   #13
DockingPilot
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John,
This is the HyperPro shock. Does this shed any light for you ?





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Old 08-22-2009, 10:47 AM   #14
johngil OP
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Is there a heim joint or some sort of swivel bushing on the shock mounts?
I'll post a couple of photos of the Ohlins setup later.
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Old 08-22-2009, 10:59 AM   #15
kmueller_gs12
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@dockinpilot
hi my name is klaus from germany.
my daughter ride a 2008 f658gs original sock lowered.
this week i change the shock to an normal high wilbers shock.
in the reprom bmw wrote tighten the bolts with 100nm.
the bold at the swingarm is ok, but at the upper bold i cant tighten to 100nm. i can turn it further.
how do you did it when you change the shock
sorry for my english.
thanks and best regards

klaus müller
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