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Suspension Suspension and Handling Forum - bouncy bouncy!


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June 22nd, 2015, 06:10 AM   #1
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I Ride: FS650 '08/FS650 '04/FE501 '03/FX470 '02
Swingarm Bearings

Hi Guys

Would anyone care to speculate why they changed the simple Bush and Needle Roller setup to the new style, with the caps on the end of the bush in 2005?

Pro's & cons? I've had a look at my '03 501, '02 470, and '04 650, and I can't say that I've noticed any strange-ness relating to that type of design. The frame and the engine casings look fine, if it was maybe related to the surface area, like spreading the stresses over a larger area or something.

I know some cases have cracked around the boss where the bush pushes against it. Maybe there is some relation there? And they changed the design maybe to try and fix this?

I was just wondering.
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June 22nd, 2015, 07:38 AM   #2
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A guess at part of the reason? - To synchronize with KTM parts inventory?
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June 22nd, 2015, 07:57 AM   #3
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I Ride: FE 450 E/SM '04
I have 2004 FE450 with cracked cases.
Wright now I change my engine cases and swingarm from 2005 model.
They say that 2005 swingarm is 30% stiffer than 2004.
For me 2005 bearings are better than 2004 because they have end caps on the bush. Contact surface with engine is just bigger.
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June 22nd, 2015, 07:59 AM   #4
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Though I'm not sure if any KTM swingarm kits are the same as the BerG, I suppose thats possible too. I was just wondering when I do the SW/A bearings on my pre-'05 bikes if I should modify the SW/A to use the same setup, or should I just leave them like they are.

Maybe it's just a way to make more money, by making us buy more stuff than is actually needed?

What was that thing in the HusaberG design principles, to not make anything more complicated than it needs to be...? Not that adding cups and washers is complicating things... and since you can re-use the cups and washers.

Maybe its just a small thing that amuses my small mind
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June 22nd, 2015, 08:05 AM   #5
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Originally Posted by hacker33 View Post
I have 2004 FE450 with cracked cases.
For me 2005 bearings are better than 2004 because they have end caps on the bush. Contact surface with engine is just bigger.
Yes Hacker33, I thought that may be a reason. I wonder if anyone with the newer swingarm and casings have cracked them also?
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May 15th, 2022, 01:47 AM   #6
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Is the 05 swingarm heavier or lighter than the previous one?
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