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#520864 - 12/18/11 02:25 PM Using brake fluid in Clutch Master Cylinder
jeddclampette Offline
TON Member

Registered: 04/02/02
Posts: 66
Loc: Austin, Texas
On my '02 Sherco 2.9, the old fluid inside my CLUTCH master cyl got corroded. I took out the master, cleaned it, and got the plunger to move again. After that, I refilled it w/ DOT 4 brake fluid. Everything now works great. In fact, I'd say the clutch hydro action feels EVEN better than before. THen, I remembered on my former KTMs, I had to use mineral oil instead of brake fluid. Can I leave brake fluid in the master or do I HAVE TO USE SOMETHING ELSE?

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#520869 - 12/18/11 02:59 PM Re: Using brake fluid in Clutch Master Cylinder [Re: jeddclampette]
en1 Offline
New Member

Registered: 12/17/11
Posts: 7
Loc: Bulverde Tx
no do not use mineral oil....the Dot 3 or 4 will be fine ...

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#520872 - 12/18/11 03:43 PM Re: Using brake fluid in Clutch Master Cylinder [Re: en1]
Motomofo1 Moderator Offline
Gang Boss

Registered: 02/07/01
Posts: 428
Loc: San Antonio
En1 has worked on his damn Sherco enough, he would know. Ha

Yes, older KTMs with the Magura clutch used mineral fluid, but most everything else (including newer KTMs with the Brembo clutch) use brake fluid. Never use anything besides what's stated as the "correct" fluid.

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#520878 - 12/18/11 04:34 PM Re: Using brake fluid in Clutch Master Cylinder [Re: Motomofo1]
Hooder Offline
Gang Daddy

Registered: 08/17/08
Posts: 582
Loc: Kingsland Texas
It should say on top of the master cylinder what to use.
_________________________
Daryl Hood
Torcs 279
2016 KTM 250 xc

Thanks to my wife Jackie for letting me have so much fun. And to my son and daughter in law for letting our grandson go with us.

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#520903 - 12/19/11 02:37 AM Re: Using brake fluid in Clutch Master Cylinder [Re: Hooder]
en1 Offline
New Member

Registered: 12/17/11
Posts: 7
Loc: Bulverde Tx
Hey I have a Beta and a Sherco now ... And they both use the same fluid ....

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#521301 - 12/24/11 09:00 PM Re: Using brake fluid in Clutch Master Cylinder [Re: en1]
lmizell Offline
New Member

Registered: 11/07/07
Posts: 2
Loc: cleveland, tx
i believe the 06 up require mineral oil , which i have found is best to replace with atf. Works best in the tranny AND the clutch....PLUS you dont have to have a bunch of different oils on the shelf. ATF type F is best if you can find it. Supposedly can handle higher temperatures. BUT , to answer your original question, NO use only dot formula for brake/clutch mastr when instructed. The seals/rubber is made specific for these, adn different compunds will cause them to swell and no-workie.

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