K1200LT Rear shock mount to Swing Arm - BMW Luxury Touring Community
 
LinkBack Thread Tools Display Modes
post #1 of 7 Old Feb 11th, 2011, 4:22 am Thread Starter
Member
 
Newport's Avatar
 
Join Date: Nov 2009
Location: Newport, Victoria, Australia
Posts: 66
K1200LT Rear shock mount to Swing Arm

I recently had a complete failure of the lower rear shock mounting bolt and had I not removed the rear wheel for a tyre replacement I would no doubt have crashed on the mountain ride I was going on.
The bolt had broken in half and the main part of the bolt had fallen out with about 25mm of the bolt remaing with the nut. I strongly suspect that the flanged nut came loose allowing the bolt to move and suffer cyclic fatigue to the point that it broke in half.
BMW Australia have responded by saying that the bolt has a self locking nut from the factory but that was not the case with my bike.
Can anyone else tell me if their K1200 has a self locking nut or just a flanged nut and the year model in either instance?
I feel strongly about this as the bike has not done a big mileage and if the last piece of the bolt had dropped out I may not have been writing this thread.
I replaced my bolt with a grade 12.9 cap screw with self locking nut.
I am particularly interested in any instances of this bolt being found loose or other failures.
Newport is offline  
Sponsored Links
Advertisement
 
post #2 of 7 Old Feb 11th, 2011, 8:27 am
Senior Member
 
vernvernvern's Avatar
 
Join Date: May 2006
Location: King City, Missouri, USA
Posts: 812
Talking Re: K1200LT Rear shock mount to Swing Arm

Quote:
Originally Posted by Newport
I recently had a complete failure of the lower rear shock mounting bolt and had I not removed the rear wheel for a tyre replacement I would no doubt have crashed on the mountain ride I was going on.
The bolt had broken in half and the main part of the bolt had fallen out with about 25mm of the bolt remaing with the nut. I strongly suspect that the flanged nut came loose allowing the bolt to move and suffer cyclic fatigue to the point that it broke in half.
BMW Australia have responded by saying that the bolt has a self locking nut from the factory but that was not the case with my bike.
Can anyone else tell me if their K1200 has a self locking nut or just a flanged nut and the year model in either instance?
I feel strongly about this as the bike has not done a big mileage and if the last piece of the bolt had dropped out I may not have been writing this thread.
I replaced my bolt with a grade 12.9 cap screw with self locking nut.
I am particularly interested in any instances of this bolt being found loose or other failures.
Hi, I have an '03 LT and the lower bolt had not been removed since new, but I did remove the rear shock to install a hyperpro spring. The Clymer shows a bolt with nut and says to torque it to 37 foot lbs on reassembly.
Makes me think yours was not torqued properly for that bolt shouldn't move at all so once torqued it would stay. Since it was broken, could have been a poorly made bolt or you or someone riding the bike hit one heck of a big hole to cause it to fail. I wonder!

Maybe the guru's here will come up with a better reply for you.
Vern


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
====
Bought used K1200LT number 3. This one is green/teal with 31,369(now 7/29/2018 54,143) miles and is an '02. The first 2 bikes made it to near 150,000 miles.
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.


Due to heart health, the Dr says not to ride under 40 degree air temp. Ugh! Now it is harder to get my 18000 miles a year in just in the summer. Guess that stopped my 20 degree rides now.
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.


78 years young!
04 Honda Reflex.....Hers (it mostly sits)
Converted HD rider.
Love this LT bike and still waiting for my first speeding ticket. LOL
Vern
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

=====
vernvernvern is offline  
post #3 of 7 Old Feb 11th, 2011, 11:17 am
Wrencher Extraordinaire
 
jzeiler's Avatar
 
Join Date: May 2004
Location: Hazel Green, AL, USA
Posts: 13,231
Re: K1200LT Rear shock mount to Swing Arm

Yes it is supposed to be a self locking nut.

John
2009 K1300GT Red Rocket
2009 R1200GS (Gone)
2005 K1200LT Ocean Blue Blue Wizard 110 K and counting...
2006 Bushtec Turbo+2 Spell
2004 330 Ci Convertable
K4AN

Have ridden a Motorcycle in all 48
But lack DE, MA, RI and CT with the 2005 LT

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
jzeiler is offline  
 
post #4 of 7 Old Feb 11th, 2011, 11:22 pm
Miles of Smiles
 
Hilton's Avatar
 
Join Date: Oct 2002
Location: Touring Europe
Posts: 1,038
Garage
Re: K1200LT Rear shock mount to Swing Arm

IIRC it's 50 Nm bottom, 43 Nm on the top. Maybe a case of severe over torque which weakened the bolt. Good thing you caught it before more damage was done. Interesting fail mode, just thinking about what may have happened with no bolt !! It's a PITA but the bolt enters from the out-board side, the nut is in-board.

Jenna: Ocean Blue '06
Hilton: Head of the Steering Committee.
Rena: The Committee.
ET4 Thing 1
ET4 Thing 2
Hilton is offline  
post #5 of 7 Old Feb 12th, 2011, 1:17 am
Senior Member
 
BecketMa's Avatar
 
Join Date: Jul 2002
Location: Tucson, AZ, USA
Posts: 3,522
Re: K1200LT Rear shock mount to Swing Arm

I recently replaced the rear shock on my 00--flanged nut.

Best from Tucson
Bob

"He was a foul caricature of himself, a man with no soul, no inner convictions, with the integrity of a hyena, and the style of a poison toad." H. S. Thompson
BecketMa is offline  
post #6 of 7 Old Feb 12th, 2011, 9:27 pm
Senior Member
 
Razmataz's Avatar
 
Join Date: Aug 2008
Location: Pesotum, Il, USA
Posts: 1,334
Re: K1200LT Rear shock mount to Swing Arm

Quote:
Originally Posted by vernvernvern
Hi, I have an '03 LT and the lower bolt had not been removed since new, but I did remove the rear shock to install a hyperpro spring.
Vern
Please report on your hyperpro springs. Thinking about doing this to mine.

BMW 1200 LTC 2002


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.


Illinois...The Only State Where The Governors Make The License Plates
Razmataz is offline  
post #7 of 7 Old Feb 14th, 2011, 8:18 am
Senior Member
 
GlennM86's Avatar
 
Join Date: Mar 2008
Location: Virginia Beach, VA, USA
Posts: 605
Re: K1200LT Rear shock mount to Swing Arm

Quote:
Originally Posted by Razmataz
Please report on your hyperpro springs. Thinking about doing this to mine.

My HyperPros are great, but then I only have OEM to compare against.

Good luck

Glenn
Virginia Beach VA and Washington DC

2006 K1200LT "Phoenix Helena": Dark Graphite (#946)
2005 K1200LT "Dolly": Dark Graphite (#946) - Totaled July 2011
2002 K1200LT "Helga"-totaled Apr 2009
Iron Butt Membership # 45813


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.





To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

<By Motorcycle>


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

<By Car or Ship>
GlennM86 is offline  
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the BMW Luxury Touring Community forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in











Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Similar Threads
Thread Thread Starter Forum Replies Last Post
Rear shock reinstallation - '05 LT gosling1 K1200LT 3 Nov 5th, 2010 9:06 pm
LT rear shock install? yechave K1200LT 3 Jan 8th, 2008 5:42 pm
changing rear shock, step by step PhillWard Europe 1 Jan 24th, 2006 1:50 am
Replacement of rear shock suspension unit PhillWard Australia, New Zealand, and AsiaPac 3 Jan 17th, 2006 5:01 pm

Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome