What went wrong - another rear hub is history - MVAgusta.net
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post #1 of 103 (permalink) Old 07-17-2013, 04:10 AM Thread Starter
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What went wrong - another rear hub is history

Last February my bike was up for oil, hydraulic service and chain sprocket replacement.
So I opted to get a quick sprocket change kit for my F4.
After all I got the AEM kit.
The kit and all the other service things were done at a official dealership.
After my first ride in February I found that the chain was to tight and dust like metal shavings on the swing arm and the rim.
My first thought was sh... the rear hub is gone.
But the wheel was not wiggling or loose by any means.
So I adjusted the chain and thought I will keep an eye on it.
So now in June I was home again and rode about 700 miles.
On the last Day before I had to take off to my job overseas I found a metal piece laying on my rim.
And than my attention was drawn to the sprocket carrier.
There were holes ground to the back and shavings were visible.
Afte advise from the Kit supplier I removed the sprocket carrier.
To found what You see on the photos.
Dealership and Supplier are friendly and cooperative in this case.
No bad feelings here and I don't want to trough mud at any one.
So what went wrong ?
I'm to 95% convinced that the original spacer 800084896 is to small for the quick change flange.
The larger diameter spacer 8000A3252 of the 1000cc models is likely to be needed to avoid this damage to be happen.
Now that I'm still alive and didn't tumbled over the interstate is a wonder.
Sure it needs a new hub, sprocket carrier and sprocket.
Any one of You have an idea or an advise how to fix it or to avoid such disaster ?
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post #2 of 103 (permalink) Old 07-17-2013, 04:44 AM
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Hi Ralf,
must say I have never seen that before, clearly it's not good but Looking at the photos the hub may be ok, can't really see too much damage. There is a thick spacer washer that should be in there to give the sprocket carrier clearance. I have a quick release carrier on mine which I got from TALON and that is fine and done many thousands of miles without issue. Pull the hub, give it all a good clean and inspection and take it from there. Good luck.
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post #3 of 103 (permalink) Old 07-17-2013, 04:58 AM
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Not what you want to see after breakfast for sure.. Sprocket carrier was touching the hub unit....

Is the hub unit a pre 2010 type ?

I have just looked at my sprocket set up and there is approx 3.5 mm gap between carrier and hub face. I have also noticed your carrier is hanging off the rubbers as they have been pushed through it appears..

This is an excellent post btw and very useful to guys who are fitting a quick change sprocket kit to their bike.

joe

Last edited by gotojoe; 07-17-2013 at 05:24 AM.
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post #4 of 103 (permalink) Old 07-17-2013, 05:16 AM
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Quote:
Originally Posted by jimboF4 View Post
Hi Ralf,
must say I have never seen that before, clearly it's not good but Looking at the photos the hub may be ok, can't really see too much damage. There is a thick spacer washer that should be in there to give the sprocket carrier clearance. I have a quick release carrier on mine which I got from TALON and that is fine and done many thousands of miles without issue. Pull the hub, give it all a good clean and inspection and take it from there. Good luck.
jimboF4
How can you say the hub may be OK,sorry mate it's stuffed.The sprocket carrier has machined away the hub due to zero clearance.The spacer has been fitted,I can see it in the photo.Haupti,you said a dealership did the conversion,they are responsible for this failure by not checking clearances when fitting the aftermarket sprocket carrier.There is a lot of damage caused by the shops negligence.


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post #5 of 103 (permalink) Old 07-17-2013, 05:24 AM
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Read What I Said

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Originally Posted by mitchy View Post
How can you say the hub may be OK,sorry mate it's stuffed.The sprocket carrier has machined away the hub due to zero clearance.The spacer has been fitted,I can see it in the photo.Haupti,you said a dealership did the conversion,they are responsible for this failure by not checking clearances when fitting the aftermarket sprocket carrier.There is a lot of damage caused by the shops negligence.
Mitch, I said clean and inspect and take if from there, simples.
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post #6 of 103 (permalink) Old 07-17-2013, 05:28 AM
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You said I can't see much damage. I can see a lot of damage.How is he going to adjust the chain in the future with the segments machined down like that and some actually missing?


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post #7 of 103 (permalink) Old 07-17-2013, 05:49 AM
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Thanks for sharing Ralf!

What a beast of a motorcycle!
It growls and rages and flies across the tarmac like a wild animal that has escaped the confinement of a cage and after merely waiting restlessly until the release, will not endure being locked up ever again.


Skye I miss you. L'essentiel est invisible pour les yeux.
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post #8 of 103 (permalink) Old 07-17-2013, 07:12 AM
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You may be correct about the spacer, Ralf. I never measured the thicknesses of them but they are different part numbers.
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post #9 of 103 (permalink) Old 07-17-2013, 10:41 AM Thread Starter
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Quote:
Originally Posted by gotojoe View Post
Not what you want to see after breakfast for sure.. Sprocket carrier was touching the hub unit....

Is the hub unit a pre 2010 type ?

I have just looked at my sprocket set up and there is approx 3.5 mm gap between carrier and hub face. I have also noticed your carrier is hanging off the rubbers as they have been pushed through it appears..

This is an excellent post btw and very useful to guys who are fitting a quick change sprocket kit to their bike.

joe
Its a pre 2010 hub, actually I think the OEM 2001 hub, but it has nothing to do with bearings and such. So it really doesn't matter. A 2010+ hub would look the same, Joe.
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post #10 of 103 (permalink) Old 07-17-2013, 10:44 AM Thread Starter
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Quote:
Originally Posted by CAG View Post
You may be correct about the spacer, Ralf. I never measured the thicknesses of them but they are different part numbers.
Carl do You have accidentally such a 8000A3252 spacer.
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