2012 KX450f KYB OEM Stack LSVP Float?

[theDogger]

19 hours ago, Live2RideRide2Live said:

It seems as though the specs you and GD170 have listed are missing a 13 - .15 spacing shim. The spec I have from a new fork I did years ago has a 13 - .15. Your total stack only measure out to 2.55 so that would be why there is initial float. And the 12 - .30 should not be in the cup it but up with the other 12 - .30. Also when calculating the shims its important to add them up as such .114 .152 .205 .252 .305  to be more accurate.

Ok so you are saying that this is what the OEM should have looked like?

3-20 x .11
2-17 x .11
2-13 x .11
1-13 x .15     <<-- Here or below the clamp?
2-11 x .25 --Clamp
1-13 x .15      <<-- Or here?
1-13 x .20
1-11 x .20 
2-12 x .30<<--Moved the 1-12x.30 here

2-20 x .11
2-12 x .25 (limit shims)


Above Stack is correct?

Edited February 29, 2020 by theDogger

[theDogger]

19 hours ago, Live2RideRide2Live said:

It seems as though the specs you and GD170 have listed are missing a 13 - .15 spacing shim. The spec I have from a new fork I did years ago has a 13 - .15. Your total stack only measure out to 2.55 so that would be why there is initial float. And the 12 - .30 should not be in the cup it but up with the other 12 - .30. Also when calculating the shims its important to add them up as such .114 .152 .205 .252 .305  to be more accurate.

Ok so you are saying that this is what the OEM should have looked like?

3-20 x .11
2-17 x .11
2-13 x .11
1-13 x .15 <<-- Here or below the clamp?
2-11 x .25 --Clamp
1-13 x .20
1-11 x .20 
2-12 x .30<<--Moved the 1-12x.30 here

2-20 x .11
2-12 x .25 (limit shims)


Correct?

[DEATH_INC.]

4 hours ago, theDogger said:

Ok so you are saying that this is what the OEM should have looked like?

3-20 x .11
2-17 x .11
2-13 x .11
1-13 x .15 <<-- Here or below the clamp?
2-11 x .25 --Clamp
1-13 x .20
1-11 x .20 
2-12 x .30<<--Moved the 1-12x.30 here

2-20 x .11
2-12 x .25 (limit shims)


Correct?

Not that I know what the stock stack should look like, but where you place that will affect the stack in different ways (there's a lot going on in these valve stacks), if you put it in the top position it will stiffen the stack, in the bottom it'll just make the stack taller, and have a (very) small effect on the opening pressure. How I understand what Livetoride wrote it goes in the bottom position below the clamp (He calls it a spacing shim).

If I get what's going on in these stacks;

The top part is your 'normal' stack, it determines how stiff the mid is once the float is open.

Below the clamp is just spacing, to determine the preload (positive, negative or neutral) on the 'leaf', it could also be tuned to affect the opening pressure of the float by changing the diameter of this part of the stack where it loads the leaf, bigger diameter=stiffer, smaller softer etc.

Then the leaf can be tuned too, obviously be changing the thickness/number of leaf shims to make the initial opening harder/softer.

Then of course below this the limiting stack determines how much overall float you get. Changing the diameter of these wouldn't do anything.

To figure the overall float you need to determine the space from the bottom of the cup to the piston minus the complete length of the stack. You can make the float either 'free' by having it above the leaf, or sprung by having it below.

Sound right?

Edited February 29, 2020 by DEATH_INC.
Spelling and dodgy keyboard corrections

[theDogger]

Well just finished my forks and also my full baseline spec that I have setup based on my previous 10yrs working on Showa Sticks
This is not my first rodeo....just my first real experience working with KYB. 


Moved the extra shim up as suggested below the cross over

FC Oil Locks

Enzo Nat Tubes and .54 springs

Shock Baseline Stack

Edited February 29, 2020 by theDogger

[Live2RideRide2Live]

On 3/1/2020 at 9:07 AM, theDogger said:

Well just finished my forks and also my full baseline spec that I have setup based on my previous 10yrs working on Showa Sticks
This is not my first rodeo....just my first real experience working with KYB. 


Moved the extra shim up as suggested below the cross over

FC Oil Locks

Enzo Nat Tubes and .54 springs

Shock Baseline Stack

spot on