I bought a used BERG Gokart FARM CLAAS BFR3 with 3speed gearing and overhoaled it. There was an issue with the hub not braking and going into reverse gear. I disassembled it and discovered the little springloaded freehub hooks in wrong position and the hub to be much to much greased. I cleaned it with alcohol, put the hooks back in proper position, greased gearings and moving parts, with exception of the metal braking shoes, and assembled it. I thought I share a video, so you know what to expect when you have to work on it. The hub is very solid, easy to understand and work on. Cheers