Swing arm lock nuts - K-Bikes.com - Excellence in Motion
 
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post #1 of 6 (permalink) Old Sep 26th, 2011, 6:08 am Thread Starter
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Question Swing arm lock nuts

Please can anyone give me some info on how to loosen the lock nuts on a 97 K1200RS swing arm. I need to replace the clutch on her. When sitting on the bike it is the right side that will not move the left side is fine. Is it by chance a left hand thread?
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post #2 of 6 (permalink) Old Sep 26th, 2011, 7:45 am
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Yes, one is left hand and one is right hand thread.
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post #3 of 6 (permalink) Old Sep 26th, 2011, 8:42 am
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No No No....there ain't any left hand threads in there. Don't try that.....!

Very tight however, Clymer recommends heating it up first but they don't give a spec on temperature required. I guess they are assuming there is no Loctite in there BUT, their pics show Loctite or similar on the threads.

First clean the exterior threads you can see, you don't want any crud in there that could bind them fine threads as you remove the locknut.

Then you can lube a bit and then apply some heat. Just guessing here but 150-180 F should do it. But all depends on the type of Loctite used, if any.The heat will help the lube getting in the threads and....melt the Loctite "if any" in there.

I use the proper socket with an 1/2"breaker's bar and an old BMW fork tube over that for leverage. It should go.....Craaaaak and release.If not....start again, more heat.

You are looking at torques from 160 Nm to 200 Nm depending on the part, so lots of force required.

Benelli 50cc at 14
Yamaha RD 200 at 16
Yamaha RD 350 at 17
Honda CB 750 F at 18
Honda V45 Sabre at 24
BMW K100RS at 27
BMW R100GS at 34
BMW K1200RS at 53

Last edited by H96669; Sep 26th, 2011 at 8:49 am.
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post #4 of 6 (permalink) Old Sep 26th, 2011, 9:42 am
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Aplogies if I have given wrong info on wrong parts. Find attached the pages on removal/install.
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File Type: pdf Swing arm.pdf (710.9 KB, 27 views)
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post #5 of 6 (permalink) Old Sep 26th, 2011, 10:41 am
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Quote:
Originally Posted by crowinthehouse
Aplogies if I have given wrong info on wrong parts. Find attached the pages on removal/install.
Ah Ah! Just for you....my "proper socket" was a Princess Auto one at less then $5.00. The big cra....ack, I tought the socket was breaking but no,was the nut releasing

Benelli 50cc at 14
Yamaha RD 200 at 16
Yamaha RD 350 at 17
Honda CB 750 F at 18
Honda V45 Sabre at 24
BMW K100RS at 27
BMW R100GS at 34
BMW K1200RS at 53
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post #6 of 6 (permalink) Old Sep 26th, 2011, 3:33 pm
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I never got the 'crack' - just that feel when the journal starts to turn and you know the threads are all jamming up. I hope Richard12 has more luck than I did on my '97.

If you have done all the heating, torque loosening to 200ft lbs and it still doesn't shift, stop and drill the damn thing out. Messy, but you might just save the swingarm. A new journal is relatively cheap (compared to a swingarm). On mine it was the rear nearest the RD that seized. The journals up front seem to catch some oil mist.

There's no Loctite mentioned in my BMW CD and none on a new journal - but somebody put it on mine.



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