Mistake with clutch slave cylinder

[MWEISSEN]

I just went through a $100 lesson I thought I'd pass on in the hopes of helping some other KTM owner the mistake.

I was back-bleeding my clutch system last night, and went to button everything back up. I put the bleeder valve back on, replacing the fitting for the Magura kit, and tightened it up. The oil kept coming out the bleed hole - ugh! Several tries later, I realized I was hosed. I went to bed, resisting the temptation to re-model my bike with a hammer.

I pulled off the slave cylinder with cooler temperment (and a new slave cylinder ready). I found that the Magura bleeder fitting had a damaged thread, which caused ALL of the threads in the cylinder to get buggered up. Now when I put this on, it seemed really easy, so what gives? Anyway, I cleaned it up with an M8x1.0 die and put the new cylinder back on.

Moral of the story is be really careful with threading the back-bleed kit fitting onto the clutch slave cylinder!

 

[Jaybird]

I use a syringe and a piece of 6mm tubing. I force it on the existing bleeder fitting, never taking it out. I turn hose and bleeder screw together to close.

 

[Layton]

You probably know this but if you use the syringe (which I do) be sure to first bleed a little fluid off in the normal way. This will force any dirt out of the bleeder valve instead of up into the system.

 

[Jaybird]

Cheap as fluid is, pumping it all out is probably the ticket.