Why the BMW K1600 is safer. Duolever Suspension - BMW K1600 Forum : BMW K1600 GT and GTL Forums
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post #1 of 22 Old 07-29-2014, 11:07 AM Thread Starter
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Why the BMW K1600 is safer. Duolever Suspension



BMW Motorrad International

1) Rigid - The robust front suspension components don't flex when we hit potholes, road imperfections or small animals.

2) Separation - From F1 race cars to Hondas, the double A-frame design is best at separating the functions of the tire; braking, steering and suspension movement.

3) Adjustment - By using a single shock, it is easy to offer adjustment. Think ESA II or the upcoming Semi-Dynamic adjustment.

4) Anti-Dive - By design BMW selects the exact amount of dive we feel when braking. Enough to provide a comforting feel for dive, but not such that it affects safety or compromises chassis function.

Just like with anti-lock braking, there may well be some expert racers who can outperform sophisticated design, everyone else benefits from this duolever design. When the poo is hitting the paddles, I'm glad I am on a BMW.

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post #2 of 22 Old 07-29-2014, 11:39 AM Thread Starter
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BMW Duolever front wheel control for excellent ride precision, cornering predictability and comfort.

In the BMW Motorrad K series, the Duolever stands for maximum ride precision and cornering predictability. It combines the greatest possible ride comfort with a sensitive response. The spring travel is 115 millimetres (60 mm compression, 55 mm rebound).

The kinematics of the Duoloever provides automatic anti-dive control in the K 1600 models, so the longitudinal forces acting on the front wheel during braking cause virtually no compression. Only the dynamic wheel load distribution generates a slight dip which gives the rider feedback on braking power as is familiar from conventional telescopic forks. In this way the Duolever combines the desired amount of front wheel feedback with the comfort and safety benefits of anti-dive control.

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post #3 of 22 Old 07-29-2014, 12:24 PM
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If memory serves me this is the brilliant work of Norman Hossack.

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post #4 of 22 Old 07-29-2014, 12:48 PM Thread Starter
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Yes, you are right.

From the linked BMW site: "The BMW Motorrad engineers took as their basis a design patented by Norman Hossak of Great Britain. He had already fitted a number of BMW models with a double trailing link front wheel suspension as early as the eighties."

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post #5 of 22 Old 07-29-2014, 12:56 PM
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Was it the K1200S that started things rolling for this suspension? I think it'd be difficult trying to go back to the "other".

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post #6 of 22 Old 07-29-2014, 01:52 PM
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talking to an x motor officer he said a lot of the guys didn't like the duo lever front on the 1200 because "they washed out in the corners".

I didn't want to argue with him. but his home bike was a gold wing that he sold to but a tractor for his farm?!
then for their(wife and his) anniversary he bought the newest goldwing. he said he test road a K1600 but I kinda had my doubts as if he had. he'd most probably be on one.



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post #7 of 22 Old 07-29-2014, 01:56 PM Thread Starter
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Many reviewers say that the duolever reduces the "feel" of the road, which they are accustomed to with conventional forks. Whether there is less feel, or not, isn't as much the issue as the difference in how the road feel is conducted to the handlebars.

UK motorcycle magazine reviewers acknowledge that one becomes accustomed to the BMW front suspension feel, the same way one becomes accustomed to conventional forked suspension.

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post #8 of 22 Old 07-29-2014, 03:18 PM
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squeak..

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post #9 of 22 Old 07-29-2014, 03:18 PM
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I'm not sure I could ever go back to a telescopic fork. This bike has utterly ruined them for me. My last ride on my FJR, before I sold it, but after I had owned the K1600 for awhile, was eye-opening. All I could think the entire ride was how crappy the front end felt after riding only the K1600 for a couple weeks. Just my experience, and YMMV.

Those who say they lose "feel" when switching to the Hossack suspension are the same folks, IMO, who fault certain vehicles for lacking "character."
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post #10 of 22 Old 07-29-2014, 03:56 PM
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I pre-ordered my first GTL before the dealer had a demonstrator. When they got one in a few months later, I rode my old Harley there for my first test ride. Twenty minutes with this front suspension and I knew I had made a good decision. I don't know about "feel" but it is just outstanding under braking, in curves, braking IN curves. It's just solid. I remember my Harley feeling downright flimsy in the front afterwards.

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