While installing my new 7602 Racing clutch slave piston, I discovered a thick milky-colored goo mixed in with the Magura. The goo was kind of " a blob by itself", suspended in the Magura fluid. I drained the entire system after discovering the stuff but it seemed to be isolated to the slave and not the reservoir. After draining the original fluid and refilling with new Magura Blood, the clutch pull felt crisper so I'm pretty sure the stuff was affecting performance of the clutch. Any ideas what it was?
When I switched my magura master to brake fluid it was full of the same stuff in the mineral oil. All lumpy and gooey looking.
Probably water. Be careful, our Magura clutches don't use brake fluid, only mineral oil or ATF. The seals are not compatible with brake fluid.
Spooky... earlier today, before seeing this post I had a look in my clutch reservoir as part of checking the clutch system because it's gradually requiring more and more pull to disengage and I have exactly the same goo you describe! A change of fluid is now on the to-do list.
