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6 Oct 2005
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Join Date: Oct 2005
Location: Oceanside, CA (USA)
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RM125/RM250 Fork on BMW R80G/S ?
I'm planning a rebuild for my BMW R80ST that I crashed a couple of weeks ago, and am considering fork alternatives. The safe bet is an R65 or R100R fork. I've searched the BMW Tech articles and have seen mention of installing a late model RM125 or RM250 with minimal hassles. I realize this fork is probably overkill for the frame, but I need a new front end anyway.
The subject line reads R80G/S because it's almost identical to my ST, and lots of folks don't know what an ST is.
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6 Oct 2005
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Join Date: Mar 2001
Location: British Columbia
Posts: 246
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I've heard mention of installing an RM fork on a G/S before. Apparently the bearing/ triple tree is a very easy bolt on, with minimal work. However, the GS/ ST does weight a bit more then an RM so fork springs will have to be changed or modified. I would be wary of keeping the 11 inches (or so) of travel as well, as this will change the steering geometry and will affect the handling of the bike, especially on the ST, which has a shorter shock then the G/S. Don’t under estimate the hassle of converting wheel/ brakes as well. A simpler, and perhaps cheaper alternative might be the R100 or 100GS forks, which will bolt right on, and require minimal fussing around. Add a G/S spec shock, and Viola! instant adventure touring bike.
Either way, good luck and let us know how you get on with the project..
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6 Oct 2005
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Thanks for the info.
If I went with the RM fork, I wil go to a suspension shop (Lindeman Engineering or somewhere similar) to have the fork set up properly. I was planning to install a G/S rear shock since mine is pretty much dead. I'd probably go with 17" motard wheels front and rear, which would help maintain stock geometry.
I believe the GS forks would still require a front wheel and rotor change. On the plus side GS forks would be more of a bolt-on solution, but RM forks are cheaper.
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Check the RAW segments; Grant, your HU host is on every month!
Episodes below to listen to while you, err, pretend to do something or other...
2020 Edition of Chris Scott's Adventure Motorcycling Handbook.
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What others say about HU...
"This site is the BIBLE for international bike travelers." Greg, Australia
"Thank you! The web site, The travels, The insight, The inspiration, Everything, just thanks." Colin, UK
"My friend and I are planning a trip from Singapore to England... We found (the HU) site invaluable as an aid to planning and have based a lot of our purchases (bikes, riding gear, etc.) on what we have learned from this site." Phil, Australia
"I for one always had an adventurous spirit, but you and Susan lit the fire for my trip and I'll be forever grateful for what you two do to inspire others to just do it." Brent, USA
"Your website is a mecca of valuable information and the (video) series is informative, entertaining, and inspiring!" Jennifer, Canada
"Your worldwide organisation and events are the Go To places to for all serious touring and aspiring touring bikers." Trevor, South Africa
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Lots more comments here!
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Diaries of a compulsive traveller
by Graham Field
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Back Road Map Books and Backroad GPS Maps for all of Canada - a must have!
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 R80G/S.
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 all over the world with the help of volunteers; 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, or ask questions on the HUBB. 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.
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