Creating a tool for changing the fork seals on my R1150gsa

So I’m experimenting here, and this short post, even though it has to do with programming, its more oriented on how to make a tool for doing some work on my bike.

Anyways, My fork seals started to leak on my beloved R1150gs adv and, as I have to do everything here on my own, (as there is no BMW motorcycle dealership here in AR) I ordered the fork seals and the dust seals from Tom Cutter at rubber chicken garage (Great guy and he sells OEM BMW parts). But I was missing somehow a tool for pushing the seals inside the forks. Some people mention to use PVC pipes, others mention that a 34mm socket would work, but I wanted to do it precise (so no PVC piping) and I didnt want to spend ~10usd on a socket just for doing that.

So I started to think on a device that I can attach one socket to and that can push around the hard circular surface area of the seals.














I ended up designing a mix between a nut and a flat cylinder that just touches specifically the hard surface of the seals in order to push them inside the forks





























It was pretty straight forward doing this in OpenScad and the final result:




























And of course the code to produce this is pretty simple: