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Old 09-05-2011, 02:18 AM   #1
Aivasovsky OP
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Eek 2003 KTM 640 LC4e - Hydraulic Clutch oil - mineral or else?

I have bought this:



Hydraulic clutch cover says "only mineral"
Service emmanuelle says "no mineral"

what i do?









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Old 09-05-2011, 02:36 AM   #2
Aussie Steve
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Shout your bike a new master cylinder and barkbusters before filling with mineral oil only.
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Old 09-05-2011, 03:08 AM   #3
mudmaps
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I've used that same Motorex mineral oil on my '03 LC4e for the past 20,000km without issue (discounting the time I failed to put the rubber insert back in properly).

I'm with Magura on this one.
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Old 09-05-2011, 09:30 PM   #4
crazybrit
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Quote:
Originally Posted by Aivasovsky View Post
I have bought this:







That section in the manual is totally retarded. I cannot believe KTM still prints it. It makes zero sense and it toally contractitory given what is on the actual clutch master cylinder

Just fill with mineral oil. Something thats about a 10 weight. Mineral oil you get from the pharmacy is closer to 80 weight, much too heavy. People use 10 weight ATF (automatic transmission fluid) also. Just don't use brake fluid, it will damage the rubber internals.
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Old 09-05-2011, 10:15 PM   #5
gunnerbuck
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Pharmacy's usually carry 2 weights of mineral oil, heavy and light, the light stuff will work in the 640 clutch... The Motorex stuff should work fine as well... Some people I know have used ATF and that works as well...
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Old 09-06-2011, 09:21 AM   #6
ChrisC
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I use this...



That being said, mineral oil from the pharmacy works fine.
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Old 09-06-2011, 01:33 PM   #7
makazica
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Whatever Citroen uses for their brake systems. Better than ATF.

Don't ask.

M.
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Old 10-03-2011, 07:17 PM   #8
faustinoeldelbarrio
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Just filled mine with citroen mineral oil (green fluid in a green container) that I believe is used in all their hidraulic systems. Has been working fine, and I agree with you, trust the clutch cap since it is more likely to find a mistake in a manual than in the clutch itself. If I have any trouble i'll let you know.
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