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Woods stack for 2007 CRF450R

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Long story short, I have a set of 2007 crf450r forks installed on the front end of my xr400.

They work decent, but I'm looking to install more of an off road style stack in the forks which would better handle rocks and roots.

What shim changes would you guys recommend?

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It sounds like a bit of a Frankenstein !!

Well if I were attempting to retro fit these forks I'd remove (4x) 32x0.1 shims and add a 26x0.1 shim between the last 32 and the 30x0.1

Ride and test, then progress from there!!

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The Valving Logic database doesn't match your shim sizes, Kenny. It shows the face shims being 30x0.1 on the 2007 450.

At a high level, to go from a MX fork to a woods setup, I'd remove some face shims, add a crossover, possibly lighten the highspeed (smaller clamp and/or thinner shims) and open up the MV float. Which of these you do and to what extent you do them depends on the stock setup, the rider, the terrain, and what you're looking to get out of them, so it's impossible be specific without more info.

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Check the CRF450R DIY revalve thread.

 

Edit: if by rocky single track you mean 1st and 2nd gear trails:

 

Maybe something like:

 

30.1 (x14)

24.1

30.1

28.1

26.1

24.1

etc. down to

14.1

 

You'll also want to lighten the midvalve considerably.  Somthing like

 

20.1 (x3)

17.1 (x4)

with .25mm float

 

And start with 330cc oil level.

Edited by heart_of_darkness

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Kyle is right, we need some more info such as weight, skill level, etc.

 

250 without gear, C level rider, rocky single track.

 

Already have it resprung for my weight + SKF seals and OEM bushings. I think i'm running 375 oil level.

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My bad ... But you get my drift with what sort of changes are needed.

Now the ball rolling with heaps of ideas :)

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If you already re sprang the bike for 250 lbs you should consider adding 2-3face shims on rebound.

What are your spring rates?

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