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Author Topic: 07 YZ450F Suspension on a YZ250  (Read 6873 times)

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Offline wysguy

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07 YZ450F Suspension on a YZ250
« on: July 04, 2011, 07:37:52 AM »
I have an "extra" 2007 YZ450F in the garage.  Are the forks/shock the same as my 2006 YZ250?  I want to get a set revalved and wanted something to ride in the interim.  Since I don't like riding the 450F, I would like to put the forks/shock on my YZ.
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Offline Coop

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Re: 07 YZ450F Suspension on a YZ250
« Reply #1 on: July 05, 2011, 07:56:10 AM »
Well since you are planning to take the 250 suspension off for servicing, why not just do a little extra wrenching and try the 450 stuff? Best way to find out  :D .

Seriously someone here might know for sure...
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Offline wysguy

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Re: 07 YZ450F Suspension on a YZ250
« Reply #2 on: July 05, 2011, 02:22:08 PM »
Quote from: Coop on July 05, 2011, 07:56:10 AM
Well since you are planning to take the 250 suspension off for servicing, why not just do a little extra wrenching and try the 450 stuff? Best way to find out  :D .

Seriously someone here might know for sure...

Well, it does fit, but I don't know how it will ride.  I have read that the valving is different, which was what I was assuming but was hoping someone would know a bit more specifically what is different.

I got lucky and the suspension shop (Pro-Action NC) is giving me a really quick turn around on my 250's kit so I will only be without a bike for a day or so.
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Offline riffraff

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Re: 07 YZ450F Suspension on a YZ250
« Reply #3 on: July 05, 2011, 08:25:27 PM »
Can the shop revalve the 450f set to the 250 specs?
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Offline wysguy

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Re: 07 YZ450F Suspension on a YZ250
« Reply #4 on: July 06, 2011, 04:30:42 PM »
I forgot to ask him.  I don't see why they can't, the physical dimensions are very close.
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Offline MyckMcClung

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Re: 07 YZ450F Suspension on a YZ250
« Reply #5 on: July 07, 2011, 08:11:31 AM »
I would assume that the 450 would be a little stiffer due the extra crap it hauls :P
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Offline Kbiker

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Re: 07 YZ450F Suspension on a YZ250
« Reply #6 on: August 15, 2011, 05:33:49 PM »
I'm pretty sure the 450 will have the newer style twin chamber forks. I think the 250 will have older tech internals. I love the twin chamber stuff, but I have always heard good reviews about the stock YZ250 stuff.
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Offline wysguy

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Re: 07 YZ450F Suspension on a YZ250
« Reply #7 on: August 16, 2011, 02:47:31 AM »
They both have the SSS KYB forks.  At least 06 and newer, to my knowledge.
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Offline SachsGS

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Re: 07 YZ450F Suspension on a YZ250
« Reply #8 on: August 16, 2011, 05:52:39 AM »
I recall reading an article in Motocross Action that stated that the latest 4T suspension is valved quite differently to deal with the way a 4T behaves in a corner (compression braking/high centre of gravity causing the front wheel to push).
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Offline MXLord327

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Re: 07 YZ450F Suspension on a YZ250
« Reply #9 on: August 18, 2011, 12:57:14 PM »
Everything I have read says that the '06 to current YZ250 forks are about the best on the market.  As long as they are sprung for your weight, maybe a re-valve for your style and riding conditions, and you can't get much better.  Much more plush than the older models on my '98 YZ250!!!
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