Ball joint installation - Hex size? - K-Bikes.com - Excellence in Motion
 
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post #1 of 4 (permalink) Old Apr 8th, 2006, 7:20 pm Thread Starter
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Ball joint installation - Hex size?

Can anyone tell me what the internal hex size is for attaching the ball joint to the leading link. Its somewhere between a 6mm and a 8mm. Is it a 7mm, is there such a thing? The manual calls for BMW special tool 31 5 600.

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post #2 of 4 (permalink) Old Apr 8th, 2006, 10:19 pm
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Originally Posted by brentboshart
Can anyone tell me what the internal hex size is for attaching the ball joint to the leading link. Its somewhere between a 6mm and a 8mm. Is it a 7mm, is there such a thing? The manual calls for BMW special tool 31 5 600.
I cannot imagine BMW using a totally nonstandard hex size like 7mm! DIN standards do not even recognize a 7mm hex size. 6mm and 8mm are the DIN-Standard sizes in this range. If they have used a 7mm hex, then someone should give them a stern talking-to!

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post #3 of 4 (permalink) Old Apr 9th, 2006, 5:26 am Thread Starter
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Well, its definitely not a 6 or 8mm or any standard SAE size. The nut is 21mm which I think is a little unusual too.

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post #4 of 4 (permalink) Old Apr 9th, 2006, 10:53 am Thread Starter
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Picked up a 7mm hex socket this morning and that's what it is. Ball joint install done!

Brent Boshart
10 R1200GS ADV (his)
09 K1300S Light Grey (hers)
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