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Old 08-08-2011, 04:47 AM   #1
The Other JC OP
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Drift depth - BMW techos

Hello
could a very nice BMW techie tell me the depth of the drift for the gearbox input shaft seal for R1200GS part no 23 4 711.

My measure with a vernier on the installed seal was roughly 5.1mm, but seemed to vary by .3mm round the seal !!!.
Would like to know the official depth for future reference.

Are you able to measure with vernier to let advrider home techs know?

Much appreciated
this picture from RepROM

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Old 08-08-2011, 02:33 PM   #2
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Hmmmm, not too much
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Old 08-08-2011, 02:59 PM   #3
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This was recently measured in another thread .... I think 5.3mm ended up being the consensus, but I could be wrong.
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Old 08-09-2011, 04:19 AM   #4
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pretty please

Quote:
Originally Posted by ErricZ View Post
This was recently measured in another thread .... I think 5.3mm ended up being the consensus, but I could be wrong.
I have searched high and low for the official value, to no avail.

Pretty please if any techos are reading
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Old 08-09-2011, 01:35 PM   #5
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Snarg, found this great pictorial but no measurement ....

http://jbrase.smugmug.com/Motorcycle...70990596_KyBmx
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Old 08-09-2011, 02:10 PM   #6
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grant's clutch job w/ pics and measurement: http://www.advrider.com/forums/showp...7&postcount=63
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Old 08-09-2011, 02:47 PM   #7
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5.3mm for the input shaft seal installer tool.
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Old 08-10-2011, 03:50 AM   #8
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fingers crossed

Thanks people.

I think I got it right enough. Feel more happy now with what I did.

I made this drift tool from a $1.50 plastic pipe bit from the hardware store.
Trimmed it down till it sat lightly on the existing seal and hard on the sholder, then used it to tap in the new seal.

5.2mm the final depth for the new seal. If it leaks again, new tool at 5.3 coming up!.
My new Siebenrock friction disk won't mind a bit of oil.

Julian
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