Rieju & GasGas Legacy Riders Club Forum  

Go Back   Rieju & GasGas Legacy Riders Club Forum > GasGas Enduro Technical Forums > Enduro Suspension

Enduro Suspension Tuning & maintenance of Enduro forks, shocks, etc


Reply
 
Thread Tools Display Modes
  #1  
Old 04-06-2017, 03:17 PM
Zman's Avatar
Zman Zman is offline
Platinum Level Site Supporter
 
Join Date: Apr 2010
Location: Burbs of Chicago
Posts: 1,818
Default KYB SSS Valving Input Please

I put a full 2008 YZ450 Front end on my 2000 GasGas XC300. I am 51yrs old, (riding 42 yrs). 6' 4", 250lbs in street clothes.*I enjoy all kinds of riding but prefer difficult single track, trails and hills.*(probably*B-C Enduro). *
*
I changed springs to Racetech 48 with 5mm of preload.* I have tried to soften the forks about 7 times so far and below is what I have now for a tune.

The forks are still too stiff on trail trash even with the compression adjusters complete loose. They work great for big hits but they are too stiff most for most all else.
*
Midvalve
*
Nut
Washer
11mm*(x1) 0.25mm
12mm (x1) 0.11mm
14mm (x1) 0.11mm
16mm (x1) 0.11mm
18mm (x1) 0.11mm
13mm (x1) 0.11mm
20mm x0.045 (x3)* 0.11mm (Stock had 4)
Piston
20mm x 0.045" (x2)*0.11mm (Stock had 4)
17mm x 0.045" (x2) 0.11mm (Stock had 3)
11mm x 0.01" (x2) 0.25mm
17mm x 0.01" (x3) 0.3mm
17mm x 0.045" (x1) 0.11mm (moved from above)
Collar
*
Estimated Midvalve Float* 0.5mm (as I removed*two*0.11mm shims)
*
Base Valve
*
​Nut
Cup Washer 4 holes
​Spring
big silver washer with collar
​​Piston
​32mm (x9) 0.11mm
20mm (x1) 0.11mm (from*midvalve stack)
32mm (x6) 0.11mm* (stock was 18x 32mm)
30mm (x1) 0.11mm
28mm (x1) 0.11mm
26mm (x1) 0.11mm
24mm (x1) 0.11mm
22mm (x1) 0.11mm
20mm (x1) 0.11mm
18mm (x1) 0.11mm
16mm (x1) 0.11mm
20mm (x2) 1.58mm
11mm (x2) 0.25mm
*
310cc 5w BelRay oil
*
*
It seems that the compression screws do not have a big impact on the dampening.* Any input would be appreciated.


Reply With Quote


  #2  
Old 04-07-2017, 12:38 AM
(F5)'s Avatar
(F5) (F5) is offline
Gold Level Site Supporter
 
Join Date: Jul 2006
Location: Wellington New Zealand
Posts: 2,063
Default

I know sht about actual valving. I cheated and a mate revalved to KTech Club specs. Much betterer.

Opening to full open on the clickers can be more harsh as it blows through then gets stiff real quick. Best keep within several clicks of middle and find best comprise. Then revalve if that's not good enough. Any more clicks is out of range.

Sorry can't give actual valving specs as I don't have them. But they can be made good for technical.
__________________
'07 EC300 GG
'14 TXT250 GG
'? 496 CPI Cheetah RZ/RGV hybrid
'22 765 Street Triple RS
'21 XTrainer
'69 Stinger T125 Suzuki
'23 TRS 250RR (it's a Trials thing)
Reply With Quote
  #3  
Old 04-07-2017, 06:40 PM
Jakobi's Avatar
Jakobi Jakobi is offline
Super Moderator
 
Join Date: Oct 2010
Location: Australia
Posts: 7,994
Default

Why all this lbs talk.. now I have to do conversions!

Being YZF450 forks, they'll probably have quite firm ICS rates. This adds quite a bit of firmness, especially when added with firmer preloaded springs as well.

.5mm is quite a large float, and your mid very soft.

I'd go back to around .4mm float, and a more traditional mid valve.

Address the basevalve!!

​​Piston
​32mm (x9) 0.11mm
20mm (x1) 0.11mm (from*midvalve stack) --- I don't like crossovers this small. I'd be more around 26/28mm if using.
32mm (x6) 0.11mm* (stock was 18x 32mm)
30mm (x1) 0.11mm
28mm (x1) 0.11mm
26mm (x1) 0.11mm
24mm (x1) 0.11mm
22mm (x1) 0.11mm
20mm (x1) 0.11mm
18mm (x1) 0.11mm
16mm (x1) 0.11mm ----> this is your main issue.
----------add clamp 14mm x.3mm
20mm (x2) 1.58mm
11mm (x2) 0.25mm

Simply changing the clamp to a 14/13mm shim x .3mm you'll soften the whole stack up. You may wish to pull a couple more face shims as well.

Also, considering that you've upped spring rates, you may wish to add a bit more rebound control as well.
Reply With Quote
  #4  
Old 04-07-2017, 07:02 PM
Jakobi's Avatar
Jakobi Jakobi is offline
Super Moderator
 
Join Date: Oct 2010
Location: Australia
Posts: 7,994
Default

Note, just checked spring rates, and they should be fine. Even if you have the firmer ICS springs.

So I'd add another face shim back to both sides of the mid valve. That will close your float to approx .39mm.

Then soften the basevalve to something like the following.

32 (6)
26
32 (6)
30
28
..
14.3 (or 13)

Then test.
Reply With Quote
  #5  
Old 04-08-2017, 12:15 AM
Zman's Avatar
Zman Zman is offline
Platinum Level Site Supporter
 
Join Date: Apr 2010
Location: Burbs of Chicago
Posts: 1,818
Default

Thank you both.

Jakobi -So to make sure I understand you correctly I should modify it like this?

Midvalve
*
Nut
Washer
11mm*(x1) 0.25mm
12mm (x1) 0.11mm
14mm (x1) 0.11mm
16mm (x1) 0.11mm
18mm (x1) 0.11mm
13mm (x1) 0.11mm
20mm x0.045 (x4)* 0.11mm (Stock had 4)
Piston
20mm x 0.045" (x3)*0.11mm (Stock had 4)
17mm x 0.045" (x2) 0.11mm (Stock had 3)
11mm x 0.01" (x2) 0.25mm
17mm x 0.01" (x3) 0.3mm
17mm x 0.045" (x2) 0.11mm (moved from above)
Collar
*

*
Base Valve
*
​Nut
Cup Washer 4 holes
​Spring
big silver washer with collar
​​Piston
​32mm (x6) 0.11mm
26mm or 28mm (x1) 0.11mm (I will see if I can find one in a set of WP43s)
32mm (x6) 0.11mm* (stock was 18x 32mm)
30mm (x1) 0.11mm
28mm (x1) 0.11mm
26mm (x1) 0.11mm
24mm (x1) 0.11mm
22mm (x1) 0.11mm
20mm (x1) 0.11mm
18mm (x1) 0.11mm
16mm (x1) 0.11mm
14mm or 13mm (x1) 0.3mm [U](I will see if I can find one in a set of WP43s)
Do I remove both 20mm and the 11mm or do I keep the 11mm?

Thank you for the help!
Reply With Quote
  #6  
Old 04-08-2017, 02:36 AM
Jakobi's Avatar
Jakobi Jakobi is offline
Super Moderator
 
Join Date: Oct 2010
Location: Australia
Posts: 7,994
Default

The shims below the main stack are referred to as the bleed stack. By running as below they don't block any ports off, which isn't needed for off road so I'd keep them as is:

20mm (x2) 1.58mm
11mm (x2) 0.25mm

Have a look at the assembly and where they sit and you'll see what I mean.

Everything above looks pretty good.
Reply With Quote
  #7  
Old 04-08-2017, 07:29 AM
Zman's Avatar
Zman Zman is offline
Platinum Level Site Supporter
 
Join Date: Apr 2010
Location: Burbs of Chicago
Posts: 1,818
Default

Ok so my Base Valve will look like this?
*
​Nut
Cup Washer 4 holes
​Spring
big silver washer with collar
​​Piston
​32mm (x6) 0.11mm
26mm or 28mm (x1) 0.11mm (I will see if I can find one in a set of WP43s)
32mm (x6) 0.11mm* (stock was 18x 32mm)
30mm (x1) 0.11mm
28mm (x1) 0.11mm
26mm (x1) 0.11mm
24mm (x1) 0.11mm
22mm (x1) 0.11mm
20mm (x1) 0.11mm
18mm (x1) 0.11mm
16mm (x1) 0.11mm
14mm or 13mm (x1) 0.3mm
20mm (x2) 1.58mm
11mm (x2) 0.25mm

I see your point how adding the 13/14mm will soften the whole stack.

So if I understand correctly, my present stack does not have a bleed shim because the 32mm shims are placed directly against the piston? A bleed shim in this stack might be an 11mm placed between the piston and the first 32mm of the main stack?

This may be a silly question but if I can not get a single 13 or 14mm x 0.3mm thick can I build it from multiple thinner shims (adding up to 0.3mm) and get the same results?
Reply With Quote
  #8  
Old 04-08-2017, 05:32 PM
Zman's Avatar
Zman Zman is offline
Platinum Level Site Supporter
 
Join Date: Apr 2010
Location: Burbs of Chicago
Posts: 1,818
Default

I found that I have a pair of 21mm and a 24mm. Will they work in place of the 26 or 28 or will that make it too soft?

I also have a pair of 12mm, 14mm and 16mm 0.11mm thick. Can I stack these to get close to the 13/14mm 0.3mm or would it be better if I just order the correct ones?

If I am ordering shims should I get the metal free pistons too or don't replace them until they break?
Reply With Quote
  #9  
Old 04-08-2017, 08:13 PM
Jakobi's Avatar
Jakobi Jakobi is offline
Super Moderator
 
Join Date: Oct 2010
Location: Australia
Posts: 7,994
Default

You can try the 14x.11mm clamp. Usually just aim for more to allow more room for the shims above to flex over the clamp if required.

You can try the 24mm crossover if you like as well, or simply leave the crossover right out and run a straight stack.

With the KYB they have an option for a bleed stack. This essentially bypasses the clicker. By running your 11.25 (2) and the spacer at the bottom of your compression stack you are leaving the small ports open, and bypassing this.

This is different to what is referred to as a bleed shim, and that is exactly what you have said above. It sits between the face shim and piston face to allow the ports to be partially open at all times, allowing bleed.

The free pistons, if they aren't broken and look in good condition I would simply drill them to avoid the pressure build up that breaks them. Otherwise if you want to drop some coin you can get the metal ones.
Reply With Quote
  #10  
Old 04-08-2017, 11:40 PM
Zman's Avatar
Zman Zman is offline
Platinum Level Site Supporter
 
Join Date: Apr 2010
Location: Burbs of Chicago
Posts: 1,818
Default

Thank you Sir!

So I could actually run the 12mm under the 14mm to make it a bit thicker and allow for more room for the compression stack to move.

For my situation is there a benefit to leaving the bleed stack in place or should I invert it as shown below?

Am I correct that the 24mm in the middle of the twelve 32mm will soften the initial part of the stroke when compared to the consecutive stack of 32mm?

Nut
Cup Washer 4 holes
​Spring
big silver washer with collar
​​Piston
​32mm (x6) 0.11mm
24mm (x1) 0.11mm
32mm (x6) 0.11mm
30mm (x1) 0.11mm
28mm (x1) 0.11mm
26mm (x1) 0.11mm
24mm (x1) 0.11mm
22mm (x1) 0.11mm
20mm (x1) 0.11mm
18mm (x1) 0.11mm
16mm (x1) 0.11mm
14mm (x1) 0.11mm
12mm (x1) 0.11mm
11mm (x2) 0.25mm
20mm (x2) 1.58mm
Reply With Quote
Reply



Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
05 shiver valving jasont1532 Enduro Suspension 6 11-11-2012 10:40 AM
Sachs fork valving '10 300 Bailey28 Enduro Suspension 16 10-18-2011 08:43 PM
sachs fork valving dh racing Enduro Suspension 6 03-24-2011 01:03 AM
08 EC300 Fork valving AdrenalineJunky Enduro Suspension 9 08-13-2010 03:58 AM




All times are GMT -5. The time now is 09:17 AM.


Powered by vBulletin® Version 3.8.6
Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.
Copyright 2009 - GasGasRider.org