2000 K1200RS - Seals? - K-Bikes.com - Excellence in Motion
  • 1 Post By H96669
LinkBack Thread Tools Display Modes
post #1 of 10 (permalink) Old Aug 24th, 2018, 12:52 pm Thread Starter
Join Date: Aug 2018
Posts: 7
2000 K1200RS - Seals?

Just picked up a 2000 K1200RS for next to nothing (traded a 2003 Buell XB9R that tried to kill me for it). When I rode it home, it was without a doubt the smoothest bike I've ever ridden.

Now for the issue (the only one I could find) with it - there was some grime on one of the seams. I think it's between the transmission housing and the clutch. I wiped it off and thought nothing of it until the clutch slipped on me on the way to work this morning. Based on my research, it looks like there could be three culprits - clutch fluid, transmission oil, or engine oil.

I checked the fluids that I could (engine oil and clutch fluid), and neither of them seem to be down any. So I'm hoping that this means that it's just the transmission output shaft seal because that's the only fluid that I can't check.

If I have to replace the clutch (which I'm not sure of right now), do I have to replace everything or just the friction plate and clean the rest with brake cleaner or some other degreaser?

I'm taking it to an independent shop next week for an assessment. Hoping it isn't much, because I've got big bills coming up...

Any suggestions?


Edit: It's only slipping in the higher gears (5 and 6) at higher RPMs (over 6K or so). Hope this means that the clutch isn't completely toast...

Last edited by tssmith; Aug 24th, 2018 at 12:54 pm. Reason: Forgot to include info.
tssmith is offline  
Sponsored Links
post #2 of 10 (permalink) Old Aug 25th, 2018, 10:48 am
Join Date: Jul 2017
Posts: 34

Part 1 of 4

Solves the slipping but won't stop the cause



97 K1200RS "Fixer Upper"
85 GPZ1000RX
85 GPZ600R
89 RG250 Gamma (heart transplant - 350 YPVS Blue smoke std)
bstardchild is offline  
post #3 of 10 (permalink) Old Aug 28th, 2018, 7:03 pm Thread Starter
Join Date: Aug 2018
Posts: 7
Thanks! Iíll give it a shot.

Turns out the problem was a leaky clutch slave cylinder along with the engine being overfilled with oil.
tssmith is offline  
Sponsored Links
post #4 of 10 (permalink) Old Aug 29th, 2018, 8:44 am
Zmonster's Avatar
Join Date: Aug 2018
Posts: 18
Thanks for starting this thread. I looked at my KRS, and noticed the same leak in the video. Ill give the Coke fix a shot should I experience any slipping.
Zmonster is offline  
post #5 of 10 (permalink) Old Aug 31st, 2018, 7:03 pm
Senior Member
Felix's Avatar
Join Date: Jul 2003
Location: New Jersey, , USA
Posts: 131
Why can't you check the transmission oil? Is the filler plug welded shut or something, or is it that you don't have the right size allen wrench?

Sounds to me like the rear main seal leaking. I suppose it could be the tranny input, though. Either way, the back half of the drivetrain has to come apart to access the clutch. You'll know which seal is leaking once you're in there. Not a difficult job, just time consuming (labor $$), and it requires rigging the bike. The centerstand comes out with the tranny, so you need other means to support the bike.

' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' '
John Filak - Dallas, Texas

'01 K1200RS '01 R1100S '02 R1150RS
Felix is offline  
post #6 of 10 (permalink) Old Aug 31st, 2018, 9:59 pm
DallasKRSRider's Avatar
Join Date: Jun 2003
Location: Dallas, TX, USA
Posts: 440
That series of K-bikes had the epic engine output shaft o-ring failure. Which means it's leaked oil into the dry clutch compartment. That means the clutch is toast. And that means removing everything behind the engine. Been there, done that on my 2002 RS at 75K miles. What it needed is a viton o-ring, which is petro resistant, and is not what BMW installed originally, but does offer it now. Sorry for the grim news....

And if that's not the problem...sorry I petrified you!!

Ken Bowen-Retired MSF RiderCoach

Kerrville, TX

"Ride Safe, Ride Smart, Ride Home...
DallasKRSRider is offline  
post #7 of 10 (permalink) Old Sep 8th, 2018, 6:07 pm
Senior Member
Join Date: Jul 2016
Location: Seattle, WA, USA
Posts: 135
Hi Dallas,

Actually Neoprene O rings are very adequately Petroleum resistant. If an O ring fails, it's because the ring groove surfaces got too dirty, too hot or the location de-stabilized from thrust, vibration, or the application needed a larger O ring.

It's cheap-ass Butyl Rubber you want to avoid. That garbage also dissolves in Alcohol which is why we see seals made of it fail because of our garbage Ethanol gas. When they first introduced that distilled Corn crap into our gas, the stuff ate up the Butyl seals of the In-Tank fuel pumps making for some damned big repair bills. Thank you EPA. For the most part, I think Butyl rubber has disappeared from engine parts.

Viton O rings are vastly superior to either and should be installed where ever possible (size and availability permitting). Viton wears better and can withstand a sustained 500 degrees and remain flexible. You can actually use it for head gaskets. I have also used it in it's machinable round stock form which I believe is called Peek (spelling?).

The only reason we haven't seen a complete takeover by Viton is that they are more expensive. My take on it is that if they were 10 times the money, it would be worth it.

You can spot Viton by the Brown color as opposed to Black Neoprene and it is a little more dense which you can feel when squeezing or bending it. If the added denseness is not present, it's probably just made of brown Silicon. I've seen this.
SpaceViking is offline  
post #8 of 10 (permalink) Old Sep 8th, 2018, 7:32 pm
DallasKRSRider's Avatar
Join Date: Jun 2003
Location: Dallas, TX, USA
Posts: 440
Well my o-ring that failed came on the 2002 RS...right from BMW. And I traded that bike off in 2012 after 133K miles and no more o-ring failures. But everything you posted I'm fully aware of...but thanks....

Ken Bowen-Retired MSF RiderCoach

Kerrville, TX

"Ride Safe, Ride Smart, Ride Home...
DallasKRSRider is offline  
post #9 of 10 (permalink) Old Aug 28th, 2019, 12:58 pm Thread Starter
Join Date: Aug 2018
Posts: 7
Final Fix

Well, as it turns out, it was the rear O-ring that was shot. So I replaced everything in the list in the attached picture. It wasn't cheap, but the clutch isn't slipping anymore. I also ordered the oil-resistant friction disk from Germany so if the leak re-develops it won't leave me stranded and (hopefully) I won't have to replace the clutch.

Thanks for the help!
Attached Thumbnails
Click image for larger version

Name:	97K1200RSClutch.jpg
Views:	13
Size:	213.1 KB
ID:	25193  
tssmith is offline  
post #10 of 10 (permalink) Old Aug 29th, 2019, 7:56 am
H96669's Avatar
Join Date: Jun 2009
Location: Burton, British Columbia, Canada
Posts: 1,651
To correct some of the misconceptions posted above,a Viton O-ring isn't necessarily brown.Black Viton is rather common and so is blue.

Black Viton at my clutch Oring.My recently cleaned fuel injectors came back with spiffy looking blue Viton O-rings and green pintle caps.

The BMW clutch O-ring isn't Viton.I bought another one a couple years ago just to test it.Easy enough to differentiate.....place BMW and VITON side by side on a hard surface and tap with a small hammer.Butyl Bounces and
Viton Thuds.......B=B....T=T.
sailor likes this.

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
H96669 is offline  

Quick Reply

Register Now

In order to be able to post messages on the K-Bikes.com - 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
K1200RS 1998 or 2000? hopz K1200RS/GT (Classic) 10 Aug 24th, 2018 10:48 pm
k1200rs fork seals RichterScale Technical, Repair and Maintenance 7 Nov 20th, 2016 5:57 am
2000 K1200RS for sale raddboy41 Bikes 1 Jan 8th, 2015 4:36 pm
New Owner- 2000 K1200RS crh Bike Talk 13 Feb 28th, 2010 8:43 pm
2000 K1200rs Cranks but wont start??? Ratmann1 Technical, Repair and Maintenance 10 Aug 29th, 2009 7:25 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