I let my GS sit for about a month because it had no clutch and I was afraid the slave cylinder was tough to replace. Oh and not to mention I was pinching pennies to get the 141$ for a new one. I did a 4k mile trip last summer and the fluid went bad. Bled it and went about another 500 miles and no clutch again. Another bleed lasted a bit longer and then finally gave up. So got some tips here on how to tear into it and new parts and gave it a go. About a 4 hour job for me that may have been done quicker had I had a thread with pics that could have helped a bit. So I took pics in the process for those out there like me that didn't exactly know where the slave even was. Ok so first off get the new slave, a new green mickey mouse gasket, and a 2 new crush washers. Take off the tire and support the bike- Take off the rear shock and pull the hosing down so you can let it rest on the ground. One big alan bolt on the lower lefthand side and another on the top will allow it to drop down so you can get behind it to the slave. The slave is behind a support for the frame with 3 alans that are hard to get to. What I did is use the stock alan tool that comes in the BMW kit It's the longest one with the tip that looks like a mushroom. I put that long end into the slave alans and then used the breaker bar in the kit to carefully loosen these bolts. Take your time, breath and don't f*ck up these alans. Next you'll have to clip a few zip ties to remove your clutch bleed hose. Pull it down and under the frame you don't need to remove it yet. Remove the other end of the slave's connection which is the one coming from the clutch's master cylinder. This connection was a difficult one for me to remove but hopefully not for you. Be ready for fluid to come out of this connection! NOTE- The pic shows AFTER I loosened the bolt with the other end of the alan wrench. Then I flipped it around to get it out quickly What you can see from mine is a mess left inside from the breakdown of the fluid causing a fail to the clutch. Slide the slave to the left of the bike and it will easily come out of the bike without having to remove the swingarm. Here is what mine looked like. I took it over Medano pass and dug it deep in the Great Sand Dunes area, rode it 45k miles and then took it back to Oregon on the beach and also dug it in the sand a few times there too. So I guess that's a good reason why mine would have been so gunked up. Could it have also been due to heat? Here is what a new one looks like.