I've recently bought a KTM 950 ADV S in perfect conditions, it had been sitting in a Car Dealership fro almost 3 years. Excellent price, completely stock, and 17k km on it. The OEM master cylinder was already leaking, I've bought the kit to change the internal pistons, seeger and everything. My first mistake was to buy the kit with the OEM diameter, 10,5mm. As soon as I installed it it started leaking again. After a few weeks I had to fill mineral oil every 2h of riding. I came across and original BMW GS 1200 (2012) Master Cylinder, practically new, I took it home for 59 euros. Mounted without any problem, I've shortened the lever (I still have to paint the end, I know) This might be useful to everyone who's still in doubt of rebuilding the original mastercylinder/buying an expensive accossato etc.