Author Topic: Front fork compression adjuster  (Read 404 times)

Offline Scrogs10

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Front fork compression adjuster
« on: February 13, 2018, 08:05:58 am »
 I have just fitted new Wilber springs and changed the oil in my front forks.
While the forks were out I thought I would change one of the compression adjusters at the bottom of the fork as mine is chewed up and I am unable to adjust it.

As you know they are a slotted screw in to a 10mm spanner size holder that simply screw in the bottom of the fork and click in and out on the screw.
 I looked on the schematic for the front forks and there is no mention of the adjuster or its mounting. So I emailed the Yamaha parts supplier Fowlers in bristol and ask about the part.

They have replied saying the part is not listed and they must come with the fork leg.  ::010:: The lower fork leg is £400 inc VAT here in the U.K not to mention the work to change it as a complete unit. Obviously I would just unscrew the adjuster .

Has anyone else replaced their compression adjuster and if so where did you get it ?

I'm finding it very difficult to believe the adjuster is not available seperatly.

Offline blitz11

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Re: Front fork compression adjuster
« Reply #1 on: February 15, 2018, 02:31:25 pm »
You can get replacement compression parts from Traxxion Dynamics in Georgia, USA.  When I modified my suspension, i went with traxxion dynamics valves, shims, and "holder" mechanism.

You can see their parts here:

disclaimer: They provided valving for my S-10,and i used their fork inserts (AK-20) on my Duke 690.  (They also provide my penske shocks.)  I cannot recommend them more highly.  No financial interest, just a completely satisfied customer. 


Dan Anderson, Internet Sales,  Traxxion Dynamics, Inc.

Online jrusell

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Re: Front fork compression adjuster
« Reply #2 on: February 16, 2018, 02:41:31 am »
What you are looking for are compression flow control valves.  There are a few who make aftermarket versions.  Ohlins and Ktech are the most common.
Usually they unscrew from the lower and you simply screw in the new aftermarket part.
I looked on the Ktech site and unfortunately they don't list one for our bikes.  There is a good chance some of the other yamahas use similar adjusters and you may be able to get a used stock unit from another bike.  If you have a good suspension roadracing suspension shop nearby Go talk to them.  They may recognize which other models are the same and point you in the right direction.

If it were me I would Remove the damaged one from the fork and take a few pics. Post a question on the WERA roadracing forum to see what Yamaha/kyb forks use the same part and then start looking for a used stock one or a set of KTech adjusters. 

Last time I installed a set on a set of Showa forks they made two different valves that covered several years of showa forks.  KYB are probably the same. 2 or 3 different valves probably cover most forks over a 6-7 year run. 

Here is a link to a set  so you can see what I mean.

The units in the previous post shows compression  and rebound valves that are located in the cartridge itself.  This is not what you are looking for, but Traxxion would be a good place to call as well.  Give them a call and they probably know what versions of compression adjusters work on your bike and may be able to source you a set. 

Or give Ktech a call/email with pics of yours and they can probably sort out the proper valve.

Online jrusell

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Re: Front fork compression adjuster
« Reply #3 on: February 16, 2018, 02:44:33 am »
Just  reread your post and realized you are in the UK. 

Contact Ktech directly or any good roadrace suspension shop in your area.  I am sure they can sort them out. 

Aftermarket set are usually around $140 Canadian dollars here, so probably less than 100euro there.
« Last Edit: February 16, 2018, 02:47:10 am by jrusell »


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