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15 Mar 2017
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I suspect the fundamental problem is the use of a shaft driver boxer engine. This is great for on-road touring and has been the company's trademark since the 1930s. But it's inherently heavy, in the drivetrain and in the impossibility of building a more compact engine. So they look for weight savings elsewhere, and that's where the problems start.
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15 Mar 2017
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Quote:
Originally Posted by Des Senior
I suspect the fundamental problem is the use of a shaft driver boxer engine. This is great for on-road touring and has been the company's trademark since the 1930s. But it's inherently heavy, in the drivetrain and in the impossibility of building a more compact engine. So they look for weight savings elsewhere, and that's where the problems start.
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one of the weight saving ideas is single side swing arm - very stupid idea, against laws of physics. No wonder so many cases of broken literally in half GS bikes.
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16 Mar 2017
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Actually the SSSA was shown by Honda (who hold the patents) in racing during the 80s to be slightly heavier than the twin sided version due to its need for increased torsional stiffness. The advantages are functional, ease of wheel changing in particular. Using it as a shaft drive housing also has an aesthetic value. A further disadvantages is that in order to make the complex shapes it needs to be cast, and cast aluminium isn't as strong as extruded section.
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16 Mar 2017
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Join Date: Aug 2015
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Quote:
Originally Posted by Des Senior
Actually the SSSA was shown by Honda (who hold the patents) in racing during the 80s to be slightly heavier than the twin sided version due to its need for increased torsional stiffness. The advantages are functional, ease of wheel changing in particular. Using it as a shaft drive housing also has an aesthetic value. A further disadvantages is that in order to make the complex shapes it needs to be cast, and cast aluminium isn't as strong as extruded section.
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you're right, but while in racing it makes some sense then for adventure bikes not really.
Such swing arm should be strong enough but bmw disagrees obviously.
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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
"This is the answer to all my questions." Haydn, Australia
"Keep going the excellent work you are doing for Horizons Unlimited - I love it!" Thomas, Germany
Lots more comments here!
Diaries of a compulsive traveller
by Graham Field
Book, eBook, Audiobook
"A compelling, honest, inspiring and entertaining writing style with a built-in feel-good factor" Get them NOW from the authors' website and Amazon.com, Amazon.ca, Amazon.co.uk.
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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