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Drinking mineral oil

E

erniebearskin

Joined Jun 2011
24 Posts | 0+
In the woods around Calgary Canada
Not me, my 2011, fe390. Have bled clutch a few times, level keeps dropping. Is there an oring in bottom of slave that can be leaking. 40 hrs on bike. Ive used almost entire magura bottle in past two months.
 
If the clutch oil is not leaking externally (I presume it's not since you didn't mention it), then it is contributing to the volume of motor oil in your crankcase. There is indeed an o-ring on the piston in the slave cylinder, but there is no KTM-Husaberp part number for it. It's serviceable - there's a snap ring that enables disassembly of the slave, but you cannot order just the o-ring from the manufacturer - only the whole doggone slave cylinder assembly.

You might try to find a source for o-rings and gaskets in your vicinity, and take the piston and o-ring to them for comparison. They might well have something for you. If you are successful, you might post the manufactorer and part number of o-ring here for all to use. This is a design flaw. An o-ring is not a proper seal for a clutch slave cylinder.

More discussion on this subject here: viewtopic.php?f=5&t=15981&p=132230#p132230
 

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