Go Back   Horizons Unlimited - The HUBB > Technical, Bike forums > BMW Tech

BMW Tech BMW Tech Forum - For Questions specific and of interest to BMW riders only. Questions comparing which bike is best etc go in the "Which Bike" forum.
Contact Overland Solutions for all your custom modifications and setup for overland travel.

7 Litre Camel Tank Lets You Explore More, Click to Find out More!

Reply
 
LinkBack Thread Tools Display Modes
  #1  
Old 25 Apr 2011
Registered Users
Veteran HUBBer
 
Join Date: Jan 2010
Location: Switzerland
Posts: 222
fork joints R80GS leaking where to change them

Hi, I have a BMW R80 GS Paris Dakar from 91, I've started a 6 month trip, I'm now, after 2 weeks in Latvia. Both my front fork joints are leaking sligntly.... I changed them befor I left, 3000km ago! Bought 2 on ebay, not genuine BMW, I don't know which they leak. Anyone could suggest me where to go to change them? Next I will go a couple of days in Finland and then 1 month in Russia befor Mongolia and the stans..

thanks in advance for your help

zimiontheloose.ch | Rock'n'roll Motorcycle Adventure!
Reply With Quote
  #2  
Old 25 Apr 2011
colebatch's Avatar
Registered Users
Veteran HUBBer
 
Join Date: Nov 2004
Location: London / Moscow
Posts: 1,739
I know an awesome place in Holland to change them ... but he would probably recommend you change the whole forks to something better rather than just the seals.

You could go to a BMW dealer, but you will probably have to wait to get the parts sent over from Germany. I wouldnt be sure that BMW motorrad dealers in Latvia or Estonia will have seals for 20 year old bikes in stock. Maybe you need to get someone in CH or DE to buy you some and just get them sent to you in the baltics. There are a million shops selling parts for old BMWs in Germany. In the meantime, find a regular motobike shop so that when the seals arrive they can change them for you.

If the seals are leaking so early, there is also a risk the chrome on your fork sliders are badly scratched. It might be bad seals, but it also might be worn forks.
__________________
__________________________________________________ ________________
"Do NOT go wherever the path may lead. Go instead where there is no path, and leave a trail"



Sibirsky Extreme - Adventure Motorcycling Guide to Siberia and Mongolia - on Facebook

Click here for Sibirsky Extreme Trail DVD Trailer
Reply With Quote
  #3  
Old 26 Apr 2011
Registered Users
Veteran HUBBer
 
Join Date: Feb 2002
Location: Back home in the UK
Posts: 875
I would look on-line and find a dealer somewhere you expect to be in about a week and get them to order new, genuine seals for you and have them fitted/fit them yourself when you get there. You might want to check the condition of the fork tubes while you are at it, my '91 GS has done 250,000 km and the forks are still fine with only one seal replacement in that time so age and high mileage does not mean the forks have to be replaced.
__________________
If gaffer tape doesn't fix it then you haven't used enough tape
Reply With Quote
  #4  
Old 26 Apr 2011
Jake's Avatar
Contributing Member
Veteran HUBBer
 
Join Date: Mar 2005
Location: Northumberland, uk
Posts: 720
my r80gs has now covered 100,000 miles (160,000km) and the seals are fine but I do replace them as a matter of course occasionally - but the sliders are still in excellent condition - Order the fork seals as already has been said from a bmw specialist , ie motoren israeli, motorworks etc and get them sent out to you - carry a spare set anyway - when you change the fork seals - after making sure the sliders are in good condition - ensure the right oil and exactly the right quantity is used as to stiff an oil or a slight overfill will make the seals leak quickly. Joergs from Germany has a good guide to changing the seals its a simple job that you could do yourself on a campsite in a couple of hours. Here is a link to doing the job properly Joergs R80GS Page hope that helps.
Reply With Quote
  #5  
Old 26 Apr 2011
Registered Users
Veteran HUBBer
 
Join Date: Jan 2010
Location: Switzerland
Posts: 222
Hi thanks for your answers. So first the fork tubes are not damaged. Then about the oil quantity I sure I've put the right one 410 and 440ml, and had to mesure the height of the oil (I think it was 160mm) when fork is completely compressed, without springs inside. Then I add the springs (progressive springs from WIRT) and close the fork.
What was very very strange, is that the 2 inner 6 pan bolt on the top of the fork, were like half unscrewed after about 2000km! I saw it by chance and tightened them again, but I can't explain how it is possible that they were loose. Because I tighten them firmly when I did it the first time.

I know Joerg in person, he's living in Switzerland not so far from me, and I used mostly his weppage to prepare my bike for the trip. But the thing with the fork seals, is it's very very difficult to get the ring out, to access the seal, and we have quite some difficulties in taking this out, scratching a little the inner part of the fork. So I won't be able to do this alone with the tools I have with me.

I will try to order thoses.

Thanks
David
Reply With Quote
  #6  
Old 26 Apr 2011
AliBaba's Avatar
Registered Users
Veteran HUBBer
 
Join Date: Apr 2001
Location: Norway
Posts: 1,350
The seal is a standard industrial seal. I can't remember the size but it's usually printed on the seal (three numbers). It should be possible to get them a bearing-supplier or maybe at some mechanical workshop.

Quote:
Originally Posted by Zimi View Post
Hi thanks for your answers. So first the fork tubes are not damaged. Then about the oil quantity I sure I've put the right one 410 and 440ml, and had to mesure the height of the oil (I think it was 160mm) when fork is completely compressed, without springs inside. Then I add the springs (progressive springs from WIRT) and close the fork.

Oil level (BMW-springs):
Left: 410ml (470ml after disassembly)
Right: 440ml (470ml after disassembly)


Quote:
Originally Posted by Zimi View Post
But the thing with the fork seals, is it's very very difficult to get the ring out, to access the seal, and we have quite some difficulties in taking this out, scratching a little the inner part of the fork. So I won't be able to do this alone with the tools I have with me.
The standard tool-kit contains all the tools to remove the inner-leg, it's a very simple construction.
If you change the seal without moving the inner-leg the risk of ruining the seal (or inner-leg) is huge!

Reply With Quote
  #7  
Old 26 Apr 2011
Registered Users
Veteran HUBBer
 
Join Date: Jan 2010
Location: Switzerland
Posts: 222
thanks for your answer, what is the inner leg? I don't understand. I had to remove first the first the dust cap, then the difficult ring to take out, then there was a washer and then I could take out the seal.

Do you think I have to change the dust cap as well? Or it is reasable. I juste changed it when I left
Reply With Quote
  #8  
Old 26 Apr 2011
AliBaba's Avatar
Registered Users
Veteran HUBBer
 
Join Date: Apr 2001
Location: Norway
Posts: 1,350
Quote:
Originally Posted by Zimi View Post
thanks for your answer, what is the inner leg?
The chrome/blank tubes:



Quote:
Originally Posted by Zimi View Post
I don't understand. I had to remove first the first the dust cap, then the difficult ring to take out, then there was a washer and then I could take out the seal.
There is a bushing under the seal and if it's badly worn it can make the seal leak pretty fast, but they usually last for a long time.


Quote:
Originally Posted by Zimi View Post
Do you think I have to change the dust cap as well? Or it is reasable. I juste changed it when I left
If it looks good it's probably okay.
Reply With Quote
  #9  
Old 26 Apr 2011
Registered Users
Veteran HUBBer
 
Join Date: Jan 2010
Location: Switzerland
Posts: 222
ok, thanks!!!
Reply With Quote
  #10  
Old 27 Apr 2011
Registered Users
Veteran HUBBer
 
Join Date: Jan 2001
Location: Perth, Western Australia
Posts: 155
If you're replacing the seals, remove the bolt at the bottom of the leg so that the upper part (the shiny bit) can be removed by pulling it out sharply, past the seals and top bush. Then the best way to remove the metal circlip to access the seal is to drill a small hole (2mm) in the leg exactly opposite the circlip groove. With the chrome part removed, you should be able to see the groove easily and measure how far down it is. This allows you to push the circlip inwards with a suitable tool. Trying to remove it from the inside with something sharp is difficult. You can fill the hole up later with a dab of silicone. I have found a suitable diameter/length of PVC pipe usefull in driving in the new seal. Obviously the forks are off the bike and the springs removed. Don't mix up any parts.

The circlip is number 6, the bolt to allow the chrome part (upper leg) to be removed is number 10. The seal is number 4.
Attached Thumbnails
fork joints R80GS leaking where to change them-microimage.gif  

__________________
Tim ('91 R100GSPD)

The only baggage you carry should be in the panniers
Reply With Quote
  #11  
Old 29 Apr 2011
Registered Users
Veteran HUBBer
 
Join Date: Jan 2010
Location: Switzerland
Posts: 222
thanks for the information, I will see what can I do. I was not able to order them in switzerland to let them ship in finland, my dealer didnt have them in stock, so I will have to see in russia probably..
Reply With Quote
  #12  
Old 29 Apr 2011
Jake's Avatar
Contributing Member
Veteran HUBBer
 
Join Date: Mar 2005
Location: Northumberland, uk
Posts: 720
An easy way of removing the circlip - and I done it to mine recently was using two pointed picks (tools with pointed ends - look like dentistry picks) available cheaply from small tool shops - the set I have has a hooked point, a straight point, a 45 degree offset point and a 90 degree offset point - the whole set was only £3.00 and are really useful for many jobs but more so for helping removed circlips, spring clips and the like. The seal can easily be popped out using a flat blade screwdriver under its lower edge and levered over the top of the fork leg. Use the old seal to push the new one home.
Reply With Quote
  #13  
Old 5 May 2011
Registered Users
Veteran HUBBer
 
Join Date: Jan 2010
Location: Switzerland
Posts: 222
I found 2 joints in Finland with the help of Capo Sakke!
Will go to a mechanic somewhere on the road in Russia
Reply With Quote
Reply


Currently Active Users Viewing This Thread: 1 (0 Registered Users and/or Members and 1 guests)
 
Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not 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


Similar Threads
Thread Thread Starter Forum Replies Last Post
Fork Oil change EKIMYRF Yamaha Tech 2 21 Feb 2008 23:28
How bad is a leaking front fork??? Chris of Motocross Africa KTM Tech 14 23 Oct 2007 23:12
f650 leaking fork seal richardb BMW Tech 5 17 Feb 2004 01:58
fork oil change Finian Yamaha Tech 10 25 Jul 2003 14:44
Is This a Leaking Fork Seal? JamesCo Kawasaki 3 29 May 2003 02:20

 
 
 

NEW! HU 2015 Motorcycle Adventure Travel Calendar is now available! Get your copy now for some terrific travel inspiration!

HUGE, 11.5 x 16.5 inches, beautifully printed in Germany on top quality stock! Photos are the winning images from over 600 entries in the 9th Annual HU Photo Contest!

Horizons Unlimited 2015 Motorcycle Adventure Travel Calendar.

"The calendar is magnificent!"

"I just wanted to say how much I'm loving the new, larger calendar!"

We share the profit with the winning photographers. YOU could be in the HU Calendar too - enter here!


HU DVD Autumn Special!

Take 40% off Road Heroes Part 1 until October 31 only!

Road Heroes features tales of adventure, joy and sheer terror by veteran travellers Peter and Kay Forwood (193 countries two-up on a Harley); Dr. Greg Frazier (5 times RTW); Tiffany Coates (RTW solo female); and Rene Cormier (University of Gravel Roads).

The first in an exciting new series, Road Heroes features tales of adventure, joy and sheer terror by veteran travellers."Inspiring and hilarious!"

"I loved watching this DVD!"

"Lots of amazing stories and even more amazing photographs, it's great fun and very inspirational."

"Wonderful entertainment!"

Check it out at the HU Store! Remember to use Coupon Code 'HEROES' on your order when you checkout.


Renedian Adventures


Renedian Adventures

What others say about HU...

"I just wanted to say thanks for doing this and sharing so much with the rest of us." Dave, USA

"Your website is a mecca of valuable information and the DVD series is informative, entertaining, and inspiring! The new look of the website is very impressive, updated and catchy. Thank you so very much!" Jennifer, Canada

"...Great site. Keep up the good work." Murray and Carmen, Australia

"We just finished a 7 month 22,000+ mile scouting trip from Alaska to the bottom of Chile and I can't tell you how many times we referred to your site for help. From how to adjust your valves, to where to stay in the back country of Peru. Horizons Unlimited was a key player in our success. Motorcycle enthusiasts from around the world are in debt to your services." Alaska Riders

contest pic

10th Annual HU Travellers Photo Contest is on now! This is an opportunity for YOU to show us your best photos and win prizes!

NEW! HU 2014 Adventure Travel T-shirts! are now available in several colors! Be the first kid on your block to have them! New lower prices on synths!

HU 2014 T-shirts now in!

Check out the new Gildan Performance cotton-feel t-shirt - 100% poly, feels like soft cotton!


What turns you on to motorcycle travel?


Global Rescue, WORLDwide evacuation services for EVERYONE

Global Rescue is the premier provider of medical, security and evacuation services worldwide and is the only company that will come to you, wherever you are, and evacuate you to your home hospital of choice. Additionally, Global Rescue places no restrictions on country of citizenship - all nationalities are eligible to sign-up!


New to Horizons Unlimited?

New to motorcycle travelling? New to the HU site? Confused? Too many options? It's really very simple - just 4 easy steps!

Horizons Unlimited was founded in 1997 by Grant and Susan Johnson following their journey around the world on a BMW R80 G/S motorcycle.

Susan and Grant Johnson Read more about Grant & Susan's story

Membership - help keep us going!

Horizons Unlimited is not a big multi-national company, just two people who love motorcycle travel and have grown what started as a hobby in 1997 into a full time job (usually 8-10 hours per day and 7 days a week) and a labour of love. To keep it going and a roof over our heads, we run events (22 this year!); we sell inspirational and informative DVDs; we have a few selected advertisers; and we make a small amount from memberships.

You don't have to be a Member to come to an HU meeting, access the website, the HUBB or to receive the e-zine. What you get for your membership contribution is our sincere gratitude, good karma and knowing that you're helping to keep the motorcycle travel dream alive. Contributing Members and Gold Members do get additional features on the HUBB. Here's a list of all the Member benefits on the HUBB.


Books & DVDs

amazon

All the best travel books and videos listed and often reviewed on HU's famous Books page. Check it out and get great travel books from all over the world.


Motorcycle Express for shipping and insurance!

Motorcycle Express

MC Air Shipping, (uncrated) USA / Canada / Europe and other areas. Be sure to say "Horizons Unlimited" to get your $25 discount on Shipping!
Insurance - see: For foreigners traveling in US and Canada and for Americans and Canadians traveling in other countries, then mail it to MC Express and get your HU $15 discount!




All times are GMT +1. The time now is 07:23.