Squeeling sound from the clutch

[RBMann]

Another good reason to drill the drain hole.

[Twinfan]

In my case I could not figure a way to get a drill bit, file, or hacksaw blade close enough to the housing to make a drain hole/channel. Piece of cake if the transmission on a bench. Not too worried as it will get an inspection every two years or about a thousand miles, lol.

[tomvv11]

Originally Posted by JimMoore

Nah. I've managed to catch a failing slave cylinder two separate times without ruining the clutch. If you're paying attention you can feel when the bearing cage collapses by the fact that the feel at the lever changes. It starts to bite at a different place.

Does the engagement point change by getting closer to the handgrip? Last night from one stoplight to the next, my clutch stopped disengaging unless I pulled it all the way to the grip. Usually I ride with two fingers on the lever and two on the grip, and the engagement point is where the lever touches my fingers. I could pump it a bit and get a little disengagement, enough for rough shifts, but taking off from a light was an exercise in coordination to pump then rev and release and shift into first at the exact moment to not stall, with honkies a-honkin' behind me.
Haven't dug into it yet, but I think my SC suddenly crapped out, either from the seal failing or the bearing collapsing. My cheaping out with an EME slave cylinder instead of one from der Vaterland is coming back to bite my buttocks. Now I'm going to get tariff-bit on top of it.

[wswartzwel]

Try bleeding the clutch slave cylinder. May just have some air in it.

[tomvv11]

My EME slave cylinder on complete disassembly turned out to be scored on the aluminum piston and steel cylinder, the seal looking worn down. The bearing was perfectly fine.
The old original Magura's seal looked new by comparison and its steel piston and cylinder smooth like buttah. Don't know why I ever changed it.
Its bearing is a bit looser and not as smooth as the EME but smooth enough for my purposes. If I could get the g.d. bearings out I would swap in the EME one but they don't budge.
EME now wants $100 for a SC rebuild kit which is just the seal, Mickey Mouse gasket and the circlip. The whole aftermarket SC is only $164.

[908/930]

tomvv11, If you get a chance can you post a pic of what the scored slave piston looks like?

[tomvv11]

Originally Posted by 908/930

tomvv11, If you get a chance can you post a pic of what the scored slave piston looks like?

This is the aftermarket piston.




The bands on the Magura steel piston were smoother than the unscored parts of the cylinder below.



There are two hard-to-see distinct bands of scoring inside the cylinder spaced out about as far as the bands on the piston. This is where they would ride when the clutch is engaged.

[908/930]

Thanks for posting that tomvv11, yes lots of marks on that piston, and looks like it spun. The seal should keep the bottom part of the piston from making contact with the bore side but is there any plastic bushing in the shallow groove near the bearing end? I did find a possible replacement bearing for the original Magura part but have not ordered one to try a rebuild yet.