Sorry no pic, but easy to describe. '07 Sherco 2.9 Despite my best intentions, the front MC and caliper got moved around a bit and were lying flat during stripping of frame to weld up breaks. MC may have even been upside down for a few weeks. No matter I thought, needs a full flushing anyway. (yes, it has been neglected because I hesitate to crack a hydraulic system on a low-speed TB that was working flawlessly-my rancher/farmer roots where you never take apart a running motor-don't ask) After all the clean fluid was sucked out from the caliper with hand vacuum bleeder, there was still little to no lever resistance at MC. Drafted wifey to pump the lever and hold for manual bleeding. After about 10 cycles of this, I noticed a coarse ground pepper-sized dark speck exit the bleed nipple. I thought that was odd given the amount of fluid I had flushed, and kept cycling the lever/flushing, as the lever was still offering little resistance. A couple bleed cycles later I saw what appeared to be a small piece of wood coming out of the bleed nipple! It was sticking out about a 1/4 inch so I pulled the bleed tubing off and pulled it out by hand. It is ~1/2 inch long by about 1/8 inch wide, and looks like a splinter with jagged ends and edges. It is fibrous and metallic feeling and has what appears to be a few copper or metallic fibers running through it. It was easy to pull apart, but not falling apart or disolving. It almost seemed like a splintered bit of pad material due to the feel and colors, except it was not as dense. And it was in the fluid of course. I thought I could look at schematics and MC and Caliper rebuild parts kits to see where a gasket or seal comprised of this type of material is used, but I don't see anything like it in the system. We continued to bleed the system and found no other debris and the lever only firmed up to about 75% of normal feel. I adjusted the actuator pin at the lever to get maximum travel and I think it will brake well enough for my event Sunday, but the lever can be pulled well past where it used to stop. And it has that darn spongy feel at the end. :-( Any ideas what it could be?