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Is S1 the ONLY oil for YZ KYB cartridge forks? Did Search with no luck.

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07 YZ 250

I had the dealer talk me into S1 fork oil instead of Bel Ray/silkolene 5wt. pitching me that it will break down the plastic and rubber internals.

Of course, S1 is TWICE as much as everyone else but is it really REQUIRED?

Thanks!

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of course not, he's making more money off of you...

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07 YZ 250

I had the dealer talk me into S1 fork oil instead of Bel Ray/silkolene 5wt. pitching me that it will break down the plastic and rubber internals.

Of course, S1 is TWICE as much as everyone else but is it really REQUIRED?

Thanks!

Whether he knew it or not, he did you a big favor.

I can't speak for Silkolene, but the Bel Ray is junk.

The Yamaha and Honda and KYB/SHOWA fluids are really good stuff.

Money well spent. :)

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i have now finished my KYB Fork wiht a Set New Seals (KYB 09 ! ) and Daves Magic Fluid!

The Forks have now "ZERO" friction on Seals !

Incredible!!

:)

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Kinda conflicting answers here...anyone had problems with other oils or just speculating?

Any sceintific reason why S1 is better than the others?(stiction, molecule size, material degradation, etc?)

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Kinda conflicting answers here...anyone had problems with other oils or just speculating?

Any sceintific reason why S1 is better than the others?(stiction, molecule size, material degradation, etc?)

noteven,

I did some checking and asking around about S1. The only answer that I got,

which is from the dealer. The "S" stands for synthetic. I still can't find the

Cst rating on this stuff, my hunch is that It could spec. out to be the same as KYB 01. If you have the dough to spend 24 bucks on overbottled hydraulic fluid then go for it. If I wasn't running Smart Performance products

I would be using Amsoil synthetic hydraulic fluid ISO 15 or ISO 22 in the forks and shock. I don't know how they sleep at night charging what they do. Well, I guess they have to pay for the fancy shmancy shiny bottle.

Don't get me started, I'm out.

I hope this helps.

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noteven,

I did some checking and asking around about S1. The only answer that I got,

which is from the dealer. The "S" stands for synthetic. I still can't find the

Cst rating on this stuff, my hunch is that It could spec. out to be the same as KYB 01. If you have the dough to spend 24 bucks on overbottled hydraulic fluid then go for it. If I wasn't running Smart Performance products

I would be using Amsoil synthetic hydraulic fluid ISO 15 or ISO 22 in the forks and shock. I don't know how they sleep at night charging what they do. Well, I guess they have to pay for the fancy shmancy shiny bottle.

Don't get me started, I'm out.

I hope this helps.

Yep, kinda what I was thinking. Thanks for all the answers from everyone!

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Yep, kinda what I was thinking. Thanks for all the answers from everyone!

If you want a very good reasonably priced oil get the Honda HP 5W from your local dealer, very good stuff (I'm convinced it's the same oil that Factory Connection uses). Good for Showa and KYB :thumbsup:

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