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mog

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this is the wp older style pds piston (primary)

D.rod 18 r.port 14 d.bleed

3.6

D.valve 50 d.port 7 d.leak

0

w.seat 1.8 w.port 15 d.thrt

7

Vspec Mvc N.port 3 N.thrt 6 MAX.clks 34

comp

this is from Florin(floating) he had to approximate the area of the ports as its 2 holes.

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Geometry Summary 2009 YZF250 Fork Mid Valve D.rod12.5 D.valve24 w.seat1 VspecMVc r.port5 D.port4.5 W.port10.5 N.prt3 D.thrt0 n.thrt0 D.bleed2.25 N.clicks23 Geometry Summary 2009 YZF250 Fork Base Valve D.rod12.5 D.valve34 w.seat1 VspecBVc r.port5.5 D.port9 W.port9 N.prt4 D.thrt0 n.thrt0 D.bleed2 N.clicks20

08 KYB shock the d thrt thing is perhaps not accurate but you can see what i tried to do if you look at the piston, the port dimensions contacting the shims are larger than the through holes Dvalve 46 rod 16 seat 1.5 rport 9.5 Dport9.8 wport 12 nplt 4 Dthrt 5.1 nthrt 8 dbleed 4 rebound rport 10.5 Dport 6 wport 8 nplt 4

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Geometry Summary 2009 YZF250 Fork Mid Valve D.rod12.5 D.valve24 w.seat1 VspecMVc r.port5 D.port4.5 W.port10.5 N.prt3 D.thrt0 n.thrt0 D.bleed2.25 N.clicks23 Geometry Summary 2009 YZF250 Fork Base Valve D.rod12.5 D.valve34 w.seat1 VspecBVc r.port5.5 D.port9 W.port9 N.prt4 D.thrt0 n.thrt0 D.bleed2 N.clicks20

08 KYB shock the d thrt thing is perhaps not accurate but you can see what i tried to do if you look at the piston, the port dimensions contacting the shims are larger than the through holes Dvalve 46 rod 16 seat 1.5 rport 9.5 Dport9.8 wport 12 nplt 4 Dthrt 5.1 nthrt 8 dbleed 4 rebound rport 10.5 Dport 6 wport 8 nplt 4

Man I hate this board...they seem to feel the need to update every couple years and it's always a cluster&%$#@!...does the quote make ANY sense?

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Geometry Summary 2009 YZF250 Fork Mid Valve D.rod12.5 D.valve24 w.seat1 VspecMVc r.port5 D.port4.5 W.port10.5 N.prt3 D.thrt0 n.thrt0 D.bleed2.25 N.clicks23 Geometry Summary 2009 YZF250 Fork Base Valve D.rod12.5 D.valve34 w.seat1 VspecBVc r.port5.5 D.port9 W.port9 N.prt4 D.thrt0 n.thrt0 D.bleed2 N.clicks20

08 KYB shock the d thrt thing is perhaps not accurate but you can see what i tried to do if you look at the piston, the port dimensions contacting the shims are larger than the through holes Dvalve 46 rod 16 seat 1.5 rport 9.5 Dport9.8 wport 12 nplt 4 Dthrt 5.1 nthrt 8 dbleed 4 rebound rport 10.5 Dport 6 wport 8 nplt 4

The quote I'm looking at has the appropriate info before it is posted although it's scattered all over the page. Anyone else see this? If I copy & paste I then see this before i post.

Geometry Summary 2009 YZF250 Fork Mid Valve D.rod12.5 D.valve24 w.seat1 VspecMVc r.port5 D.port4.5 W.port10.5 N.prt3 D.thrt0 n.thrt0 D.bleed2.25 N.clicks23 Geometry Summary 2009 YZF250 Fork Base Valve D.rod12.5 D.valve34 w.seat1 VspecBVc r.port5.5 D.port9 W.port9 N.prt4 D.thrt0 n.thrt0 D.bleed2 N.clicks20

08 KYB shock the d thrt thing is perhaps not accurate but you can see what i tried to do if you look at the piston, the port dimensions contacting the shims are larger than the through holes Dvalve 46 rod 16 seat 1.5 rport 9.5 Dport9.8 wport 12 nplt 4 Dthrt 5.1 nthrt 8 dbleed 4 rebound rport 10.5 Dport 6 wport 8 nplt 4

Freaking gibbrish...

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Lets try this:

Geometry Summary 2009 YZF250 Fork Mid Valve D.rod12.5 D.valve24 w.seat1 VspecMVc r.port5 D.port4.5 W.port10.5 N.prt3 D.thrt0 n.thrt0 D.bleed2.25 N.clicks23 Geometry Summary 2009 YZF250 Fork Base Valve D.rod12.5 D.valve34 w.seat1 VspecBVc r.port5.5 D.port9 W.port9 N.prt4 D.thrt0 n.thrt0 D.bleed2 N.clicks20

08 KYB shock the d thrt thing is perhaps not accurate but you can see what i tried to do if you look at the piston, the port dimensions contacting the shims are larger than the through holes Dvalve 46 rod 16 seat 1.5 rport 9.5 Dport9.8 wport 12 nplt 4 Dthrt 5.1 nthrt 8 dbleed 4 rebound rport 10.5 Dport 6 wport 8 nplt 4

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I assume this is what it should look like?

Geometry Summary

2009 YZF250

Fork Mid Valve

D.rod12.5

D.valve24

w.seat1

VspecMVc

r.port5

D.port4.5

W.port10.5

N.prt3

D.thrt0

n.thrt0

D.bleed2.25

N.clicks23

Geometry Summary

2009 YZF250

Fork Base Valve

D.rod12.5

D.valve34

w.seat1

VspecBVc

r.port5.5

D.port9

W.port9

N.prt4

D.thrt0

n.thrt0

D.bleed2

N.clicks20

08 KYB shock the d thrt thing is perhaps not accurate but you can see what i tried to do if you look at the piston, the port dimensions contacting the shims are larger than the through holes

Dvalve 46

rod 16

seat 1.5

rport 9.5

Dport9.8

wport 12

nplt 4

Dthrt 5.1

nthrt 8

dbleed 4

rebound rport 10.5

Dport 6

wport 8

nplt 4

This board removes spaces and crams it all together...fark it!

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  • 3 weeks later...

Are these 6 mm ID shims on the mid valve and 8 mm ID shims on the base valve?

Geometry Summary 2009 YZF250 Fork Mid Valve D.rod12.5 D.valve24 w.seat1 VspecMVc r.port5 D.port4.5 W.port10.5 N.prt3 D.thrt0 n.thrt0 D.bleed2.25 N.clicks23 Geometry Summary 2009 YZF250 Fork Base Valve D.rod12.5 D.valve34 w.seat1 VspecBVc r.port5.5 D.port9 W.port9 N.prt4 D.thrt0 n.thrt0 D.bleed2 N.clicks20 08 KYB shock the d thrt thing is perhaps not accurate but you can see what i tried to do if you look at the piston, the port dimensions contacting the shims are larger than the through holes Dvalve 46 rod 16 seat 1.5 rport 9.5 Dport9.8 wport 12 nplt 4 Dthrt 5.1 nthrt 8 dbleed 4 rebound rport 10.5 Dport 6 wport 8 nplt 4
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KYB 48 TCV

Yamaha YZ 125/250 2005

Base

Drod 12,5

Dvalve 28

w.seat 1.1

r.port 7.25

d.port 4.2

w.port 5.3

N.port 4

d.bleed 2.5

d.leak 0

d.thrt 4.0

N.thrt 4

reb

d.rod 12.5

D.valve 24

w.seat 1.1

r.port 6.45

d.port 3.3

w.port 5.5

N.port 4

d.bleed 3

d.leak 1.2 bleedhole + 1.15 bleedpassage pistonband

d.thrt 3

N.thrt 4

MV

r.port 6.85

d.port 3.45

w.port 7.9

N.port 4

d.bleed 3

d.leak 1.2 bleedhole + 1.15

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Lets try this:

Geometry Summary 2009 YZF250 Fork Mid Valve D.rod12.5 D.valve24 w.seat1 VspecMVc r.port5 D.port4.5 W.port10.5 N.prt3 D.thrt0 n.thrt0 D.bleed2.25 N.clicks23 Geometry Summary 2009 YZF250 Fork Base Valve D.rod12.5 D.valve34 w.seat1 VspecBVc r.port5.5 D.port9 W.port9 N.prt4 D.thrt0 n.thrt0 D.bleed2 N.clicks20

08 KYB shock the d thrt thing is perhaps not accurate but you can see what i tried to do if you look at the piston, the port dimensions contacting the shims are larger than the through holes Dvalve 46 rod 16 seat 1.5 rport 9.5 Dport9.8 wport 12 nplt 4 Dthrt 5.1 nthrt 8 dbleed 4 rebound rport 10.5 Dport 6 wport 8 nplt 4

The problem that you're having is that when you copied the text from the source page, your browser pulled a whole bunch of HTML formatting code with it. If it shows up like that, it's because the full WYSIWYG editor on the board software sees it but doesn't treat it as code, it just displays it. To avoid the problem, use the icon at the upper left corner ("Toggle editing mode") to switch to a simple text mode that will not, in most cases, display the code tags. You can flip it back once you've pasted if you want.

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If I put in the values for a 2009 YZ250F posted here and make it a baseline then compared it to a 2007 CR250F as posted here with the stacks from valving logic the outputs are worlds apart. I would imagine that the performance of modern suspension components isn't really worlds apart so either I'm using the tool wrong or the models aren't to the point where one can calculate absolutes, just predict the relative affect of changes.

Edited by mxaniac
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