450FX fork and shock valving?

[TN Dirt Rider]

So....anybody got the stock fork and shock valving details for the 450FX??  I'd like to try them in my '14 450F when it comes time to revalve as the purposes the 450FX was built for match up well to what I ride.

[TN Dirt Rider]

I guess nobody has pulled one apart yet.....

 

I did find a thread with stock stacks from the 2015 YZ250FX.  I'm thinking maybe I'll just copy these into my 450F and see how it works.

 

In looking at those stacks, a lot of the shims are .11 and most of the ones in my current set up at .10.  I'm going to be buying more shims anyway, but what will be the impact if I re-use the .10's instead of replacing all with .11's??  I checked the float calculation, and using .10's it should be .3 float instead of .23 with the .11's....if my math is right.

 

Trying to pull together my shim shopping list now, and I'd like to re-use as much as possible since I have shims that are close.

[mog]

0.11 is 50% stiffer than 0.10 so be aware it makes a big difference

[TN Dirt Rider]

0.11 is 50% stiffer than 0.10 so be aware it makes a big difference

Ok, I'll try to find some .11's and just replace them all.

Thanks.

[GHILL28]

0.11 is 50% stiffer than 0.10 so be aware it makes a big difference

 

33%

[mog]

You sure ??

[GHILL28]

Beam bending is pretty much always thickness cubed.

 

.11^3/.10^3 = 1.33

[mog]

You are right sorry to mislead

[TN Dirt Rider]

If I remember right the fork shims are 6 mm id on the base and rebound, and 8 mm id on the midvalve.  Does that sound right?

 

Never been in the shock before, what id shims do I need for comp and rebound there?

[GHILL28]

Probably half of the time I end up running the cube rule in the Google taskbar to make sure my conversion factors are correct, because I don't trust myself to remember all of them...

 

 

Yes 6id for BV and R, 8id for MV, 12id for shock main piston, 6id for Cadj.

Edited January 26, 2016 by GHILL28

[Clicked]

Thickness of kyb shims:

 

0.11 is 50% stiffer than 0.10 so be aware it makes a big difference

 

Beam bending is pretty much always thickness cubed.

 

.11^3/.10^3 = 1.33

 

I've seen kyb shims reported as 0.11, 0.114, 0.115 and 0.12 mm thickness.

That makes a big difference in terms of shim stiffness:

 

Dial calipers can easily measure the difference in production shims with thicknesses of 0.1, 0.15 or 0.2 mm.

No problem.

 

But, trying to figure out the difference between 0.114 and 0.115 mm you are trying to measure stuff down to 0.000,04th of an inch.

To get that level of accuracy you have to record room temperature to get repeatable measurements (LOL).

 

BTW: I think the thickness of kyb shims is 0.114 mm. That works out a Sandvik shim thickness of 0.005 inch, I like even numbers.

[mog]

50% ya

[TN Dirt Rider]

I'm pretty sure my butt doesn't have that degree of accuracy when it comes to evaluating suspension set up.  ?

[GHILL28]

The difference between .110 and .115 is 5 microns, which is .0002", or two tenths.  Still better have one good micrometer handy for that one and make sure everything is CLEAN.

 

 

So I've looked at KYB and Showa BV stacks and wondered why KYB's only have evens in the taper and Showa's have every single increment.  The KYB's are .114 (or .11, or whatever), and Showa's are .10.  Do the extras in the taper make it approximately 50% stiffer the same as the thicker shims do and they end up being really similar?

[mog]

Doubt it ,with the huge stack of face shims kyb has ,it won't be enough to compensate

[TN Dirt Rider]

Wish I had a good source for KYB shims. Tried SDI and they didn't have much of what I needed.

[GHILL28]

Doubt it ,with the huge stack of face shims kyb has ,it won't be enough to compensate

 

Assume same stiffness of face shims, and same clamp diameter, so just examining the taper.  Thick evens vs thin every mm.

[mog]

Have to run it in restackor to know ,don't forget a 50% increase in stack stiffness is nothing like 50% more damping