I can't believe this Clutch Master System and thought I'd share this experience so you don't think you are crazy. Yesterday, while enjoying a Fine Day with my '06 950 Adventure, my Clutch decided to quit working (in heavy traffic of course)... and again Weeping out of the Cylinder. Luckily, after about 2 minor stops, repairs, I was able to get it home before it went out again. All this after: 1- Rebuilding the Master Cylinder Kit in 05/10 for the same reason. 2- At the Same time, replaced the Slave Cylinder (though working) with the High Quality one by http://www.evoluzione.net/evo-cycle.htm Good for a while until yesterday. Then tried to find a Better Quality Master Cylinder unit and can't find one. My local KTM Dealer said they don't stock any since No One has had problems... I seem to be always an excepton to these rules. Well until I can find a Quality Replacement, took the Master Piston out which seems to be in Pristine condition, Cleaned it up and got it to work... but for how long? It did take me hours to get the Cricle Clip to work after finding it was Slightly Not expanding to hold and had to find a New Replacement from AutoZone (2nd Store finally had it) that had only 1 Box available with an assortment. One of them worked, and this one (Due to the High Quality of Parts in Stores Now) had to be Drilled to make the Holes big enough to fit the Snap Ring Pliers Tool made in the same locale. Thanks to a picture from Greenpat, it helped me figure out what the problem was, not too many of these hanging around: http://www.advrider.com/forums/showthread.php?t=93560&highlight=clutch+master+cylinder&page=7 For the life of me, I do not understand why they would use a low quality Aluminum bore for something this important on a Bike's Clutch system. So when I find a Better unit I will let you know... for this should not be so HARD to find for something so Universal to Motorcycles. So if anyone has some ideas with this matter I would be happy to hear them and hope this will help others in the mean time.