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 14 Dec 2001
Registered Users
Veteran HUBBer
 
Join Date: Jun 2000
Location: San Francisco, USA
Posts: 225
R80G/S fork replacement

Hey everyone,
I'm restoring an '81 R80G/S and I'm quite sure I'll eventually want to replace the forks with something more substantial. The bike has already suffered a lot of abuse and I hear these forks aren't so robust in the first place anyways. Is it true that the fork tubes are prone to breakage, or have I been listening to too many anecdotes?

I know there have been plenty of people who have replaced theirs with XT forks, and I've seen HPN's setup. What are your experiences with the GS fork or fork replacements?

Lastly, if I was to fit a set of forks from a big trail bike (XR600 or CR500, most likely), will the weight of the GS be too much for the brakes to work safely? I'm guessing that it probably wouldn't be worse than the stock GS unit, which feels really weak to me.

Thanks,
Wright

------------------
Wright Bagwell
http://www.geocities.com/wwbagwell/

__________________
Wright Bagwell
http://www.geocities.com/wwbagwell/
Reply With Quote
  #2  
Old 16 Dec 2001
Moderator
Veteran HUBBer
 
Join Date: Mar 2001
Location: British Columbia
Posts: 239
Have you looked into installing a 41mm fork of the later GS series? I owned on of these bikes and always thought the fork was quite good. Beemer prices tend to by high, but the transfer-ability of brak parts and such might make it worth it, and it is diffinitly set up for the right weight. I was thinking the same thing about XT forks, but am not sure about the weight issue. HPN sells a nice 42mm fork for the older G/S, but expensive at 2000DM. I'd be interested to hear what you end up doing!
Reply With Quote
  #3  
Old 17 Dec 2001
Grant Johnson's Avatar
HU Founder
Veteran HUBBer
 
Join Date: Dec 1997
Location: Vancouver BC Canada
Posts: 4,544
The old G/S forks have been known to break - but extremely rare, under extreme abuse only. BUT mine were straightened on day one, and now has a lot of hard miles on it with a better brake than standard, so I figure it's time to upgrade.

I'm installing a set of R100GS forks on my R80G/S. Went through all the various options, and gave up due to megacost for the good ones, or lousy brakes on the dirt bike versions.

The standard G/S brake is pretty sad, I changed to a 4 piston Performance Machine item a long time ago, with a K100 disk. I'm going to upgrade it again now that I have better forks that won't flex under braking.

A dirt bike brake is adequate for a dirt bike - but a fully loaded G/S at speed - I don't think so! DOUBLE the weight! Look at what they put on the R1100GS and rethink.

I'm thinking a 6 piston caliper on a 310-320mm disk. Decided against dual disks because of the weight, and a skinny 21" tire is probably inadequate traction.

------------------
Grant Johnson

Share the Dream!
at: www.HorizonsUnlimited.com
__________________
Grant Johnson

Seek, and ye shall find.

------------------------

Inspiring, Informing and Connecting travellers since 1997!
www.HorizonsUnlimited.com
Reply With Quote
  #4  
Old 18 Dec 2001
Registered Users
HUBB regular
 
Join Date: Dec 2001
Posts: 71
i fittedthe front end of a R100GS paralever to my 86 R80G/S a massive inprovement in terms of strengh ,stability ,and braking. the only negative point is changing the tyre -more difficult due to the "tubeless rim"
bryan
Reply With Quote
  #5  
Old 18 Dec 2001
Registered Users
Veteran HUBBer
 
Join Date: Jun 2000
Location: San Francisco, USA
Posts: 225
I guess mounting an r100g/s fork didn't come to mind because in my quest for replacement parts, I've called many restoration shops looking for G/S parts only to have them say "good luck" finding anything that someone else hasn't snapped up. I'll keep my eye out for an r100 fork/brake setup. That's obviously the best solution.

Thanks guys,
Wright

------------------
Wright Bagwell
http://www.geocities.com/wwbagwell/

__________________
Wright Bagwell
http://www.geocities.com/wwbagwell/
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


 
 


HU DVD Summer Special!

Now that summer is here, get On the Road! Take 30% off the Achievable Dream - On the Road! 2-DVD set until August 31 only. Get On the Road! Learn the tips to staying healthy, happy and secure on your motorcycle adventure!

Our veteran travellers share their tips (and great stories) for staying healthy, happy and secure on your motorcycle adventure.

"A fantastic, informative and inspirational DVD."

"It's brilliant - thank you very much!"

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


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 22:28.