Last week riding, my rear brake was not working any more. After dismounting it, I saw that the sealing ring on the piston where worn out. Gasgas is not selling a repair kit, so I checked the market and found the right one at Kawasaki from a KXF.
Fits like OEM and works like new
http://img.tapatalk.com/d/14/07/31/5ununejy.jpg
Fits like OEM and works like new
http://img.tapatalk.com/d/14/07/31/5ununejy.jpg