Clutch o-ring - - Excellence in Motion
LinkBack Thread Tools Display Modes
post #1 of 2 (permalink) Old Apr 29th, 2011, 12:11 pm Thread Starter
kringb's Avatar
Join Date: Oct 2010
Location: Oakland, CA, USA
Posts: 39
Clutch o-ring

I am replacing the clutch on my 85 k100. My question is about the o-ring that goes around the output shaft and into the clutch housing. I bought a new o-ring from the dealer and it is slightly larger than the old o-ring that came out. I tried to install the new o-ring but it would not fit into the housing. i tried to work it in with a flat screw driver but it buckles and just would not fit. I tried the old one and it fits in tightly and nicely. I still needed to work it in with the screw driver but it went in.

The old o-ring looked fine and I'd be tempted to reuse ti but I would hate to have a small leak here.

Has anyone else had this trouble with replacing the o-ring? Any advice.

For further info, I am replacing the engine on my bike. The new one is from a 1990 K100 LT. I am using the old clutch housing from my 85 RS. The o-ring is off the 90 LT. All related part numbers are identical on both engines so I don't think this is relevant but I mention it anyway. I can't check the old o-ring off the 85 Rs because I had to cut it out. I do not have any idea how old the o-ring off the 90LT is but it looks good.

Also, the new o-ring from the dealer measures to the correct size listed in the microfiche and the part numbers match. The new o-ring is perfectly smooth and round. The old o-ring off the LT as a series of small indentations (like diagonal hash marks) running around one side. These marks look like they were manufactured, not from wear. I

Any ideas of help? thank you
kringb is offline  
Sponsored Links
post #2 of 2 (permalink) Old May 2nd, 2011, 2:42 pm Thread Starter
kringb's Avatar
Join Date: Oct 2010
Location: Oakland, CA, USA
Posts: 39
Just wanted to post an update that I resolved the issue.

When I didn't receive any responses I figured that I must have done something wrong so I went back and tried it again. It turned out that I didn't have the housing pushed all the way back onto the shaft. So, I was trying to push the o-ring into the housing by hand because I didn't have enough threads exposed to screw on the thrust washer and nut. With the housing pushed all the way back onto the shaft, I was able to push the o-ring up to the housing and then use the thrust washer to compress it evenly back inside the housing.

I have no idea about the smaller o-ring off the 90 LT engine. It is a used engine that I bought and I must assume that the old owner had put it in there. There were not signs of leaking but I feel much better using the OEM part on this.
kringb is offline  

Quick Reply

Register Now

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

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


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

Email Address:


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
Clutch problems and possible solution (with pix) JCW K12/1300R/R-Sport 16 Aug 20th, 2012 11:15 am
Clutch issues -too hard basket?? rgmrogerwilco K1200RS/GT (Classic) 9 Jan 30th, 2012 12:39 pm
First Post,, Clutch Problem eduardocastrejon K1200RS/GT (Classic) 18 Jul 30th, 2010 1:49 pm
Clutch issues @ ~13600 miles Titanium5 K12/1300R/R-Sport 12 May 16th, 2009 4:57 pm
Clutch questions 03 K12GT tyggyr K1200RS/GT (Classic) 12 Oct 18th, 2005 3:00 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