Kayaba twin chambers??

[hallam76]

I am thinking of fitting some of the lattest generation Kayaba SSS forks to my 2010 250, I know the factory guys in EWC are running these forks and that a number of championship guys in the UK are also running them. I know they fit quite easy and only need a new wheel spacer, but has anybody tried them? Does any body have any base settings oil wt, spring rate, shim stack etc. How much better than the Sach units will they be???

 

[ScottyR]

I think it would be easier to put TTX inserts into the Sachs forks instead of buying and setting up KYBs. Are the fork lowers/brake mounts the same on a YZ fork as the GG?

 

[roostafish]

I don't know the answer to any of the questions, but I know a guy with an '09 YZ 250 which I think has those forks. If that bike were mine I don't think it would get a revalve because the suspension on that bike is unreal. Front and rear.

I'd say they are good units, and if they are from a YZ, they have good settings.

 

[hallam76]

The caliper mount is the same and they will also fit straight in the triple clamps, the only mod would be a wheel spacer which would be quite easy.

 

[roostafish]

Squeeze the trigger! Then give us a report. I don't see how you could go wrong.

 

[ScottyR]

The caliper mount is the same and they will also fit straight in the triple clamps, the only mod would be a wheel spacer which would be quite easy.

If that is the case, I would be interested in this mod as well. YZ forks are easy to find as someone is always parting out a blown up 250F.

 

[GMP]

A straight fit in what triple clamps? The GG Zoke triple clamps are 57mm lower, 54mm upper. As far a I know nothing fits, even a Husky or Cannondale Marzocchi which have thicker walls on the uppers. Guys have bored triple clamps to fit Showas but I don't think thats such a good idea considering the thickness of the clamp.

What I would like to know is what other triple clamp(s) with a 22mm offset (to retain steering characteristics) work on the GG frame, preferably with the GG wheel as I have a couple now. I don't mind doing a custom stem, axel, and spacers.

 

[ScottyR]

I have a 2010 EC300 in stock with Sachs forks and a bunch of Huskys with 48mm KYBs. I will try a fork swap sometime this week and see what the differences are and report back.

 

[GMP]

Scott,

Now that might work, as the Sachs are said to be 59.3mm on the lower. Measure the Sachs and KYBs, a shim is easy if needed.

 

[GasGasDreamer]

'09 YZ 250 ... because the suspension on that bike is unreal.

no 1st hand info but a good buddy rode a near new yam and said the same thing. he said the forks 'were unbeliveable'.

 

[ScottyR]

The tubes from the 48m KYBs and the 48mm Sachs are exactly the same dimensions so they should fit as long as you have Sachs clamps. The Zoke tubes are smaller and the KYBs will not fit.

 

[GMP]

Scott,

Are the Yamaha and Husky KYBs the same size?

hallam76,

Could we narrow this down to year and model Yamaha YZ250, YZ250F, etc.) ?

 

[hallam76]

The later yz and yzf forks I know are the right diameter, I am looking at 2007 YZF 250 forks.
The Husky KYB for are different they are the open cartridge and I am not sure if they are teh same diameter.

 

[ScottyR]

Scott,

Are the Yamaha and Husky KYBs the same size?

hallam76,

Could we narrow this down to year and model Yamaha YZ250, YZ250F, etc.) ?

The TC 48mm KYBs that Husky uses are 2007 era forks.

The TEs use open chambers that are the same as current Yamaha WRs.

The TC and TXC use closed chambers.

 

[GMP]

Do you guys know if the open chamber KYBs found on the Yam WRs have the same upper tube sizes as the AOS and SSS on the YZs?

 

[ScottyR]

The 48mms are the same.

 

[Keg]

I run 47mm Showas on my 48mm sachs triple clamps (with 0.5mm shimming), with a Honda front wheel too.

The WR and YZ stuff 48mm forks I checked, were too large even though they were 48mm lowers like sachs.

Maybe the 2011 CRF450 48mm showas fit easily.

260mm disc diametres mean the jap caliper mounts won't line up to gasser wheels.

 

[Leon_gasgas]

Hi!

Check this picture from Mika Ahola's blogspot..

http://4.bp.blogspot.com/_zFXxG3IdN...Dg/djIVLly99IE/s1600/Puigdemont%27s+place.jpg

All top racers (Botturi, etc) use KYB SSS twin chambers on their 2011 Gasers... Checking carefully the picture it seems that they use a Yamaha wheel too (the shape of the disc...)

My wish in another post seems that it will come true maybe in the 2012 models..? But, why then the factory offers the new Marzocchi twin chamber in the 2011 Race models? It is quite confusing... The simplest thing is to offer all models with KYB SSS (different settings for Race model...) and Ohlins TTX on the Nambotin and Cervantes Replicas.... Unless Sachs and Marzocchi forks are cheaper to buy...

 

[GMP]

The Japaneese big four have a huge buying advantage with the high numbers. The small guys have to work within their price point with the smaller mfgs.