Conventional vs. Up-side down forks? - Sportbike Forum: Sportbike Motorcycle Forums
 
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post #1 of 6 (permalink) Old 12-18-2005, 01:47 PM Thread Starter
 
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Conventional vs. Up-side down forks?

I just wanted some peoples opinions on the advantages and
disadvatages of the two types of forks. In general usd forks
seem to be regarded as better but there's some bikes with
great coventional forks. Is there a simple answer to which is
better and why?
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post #2 of 6 (permalink) Old 12-18-2005, 02:35 PM
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less unsprung mass with usd.

A few ccs short of a full litre.
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post #3 of 6 (permalink) Old 12-18-2005, 08:38 PM
 
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The biggest difference besides the unsprung weight difference is actually usd forks are more rigid. Where they mount to the clamps ,are much larger. Im going back several years but I remember regular forks were 38-40 mm wide. Usd front ends are much bigger around,like the "old" style lower legs are. The increased strength comes from the actual clamps being almost twice the size along with the increased 'bracket ' surface area. 99 % of riders really couldnt tell the difference if they couldnt see it. Forks extending and collapsing under turning and or breaking would have to pretty aggresive for 'mortal' throttle jockeys to feel differences. The reason that all bikes have them is marketing. It sells more toys when something "new" pops up. Yea,,Im as guilty as anyone! Charlie
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post #4 of 6 (permalink) Old 12-19-2005, 05:56 AM
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The usd forks certainly look a lot more trick.
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post #5 of 6 (permalink) Old 12-19-2005, 08:05 AM
 
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While I agree that most riders will never notice the increased stiffness, less unsprung weight will benefit just about anyone.



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post #6 of 6 (permalink) Old 12-19-2005, 10:58 AM
 
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This is true ..Especially those that turn,lol. Suspension having to drag around weight hardly ever a good thing.Charlie
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