Thanks for the video,. I just did this job , it was easiest one I have ever done thankfully. I managed to leave the brake light switch on , and the tiny retaining screw that holds in the brake piston , just wound it out enough to release it , if I took these out I’m going to lose the screws for sure . I also left the brake hose on too , I couldn’t see no gain in taking that off . Surprisingly the brake reverse bled immediately, the last time I did this procedure on my old GPZ 500 it took an age to bleed up . Btw my kit came with the rubber seal and the master cylinder cap seal also .

Thanks for the vid, it was indeed helpful as I needed to repair mine as well. Two things I have to offer to anyone else doing this repair.... don't bother to begin unless you have all the parts. The main reason these things fail is going to be because small amounts of brake fluid cause the rubber seal to turn to jelly. This allows gunk of all kinds to enter the cylinder. If your rebuild kit doesn't come with one, don't begin. The other thing was that I had a large build up of gunk inside between the rubber seal and the piston, and I didn't have one of those cool pliers as does Rover Lover to pull it out. I ended up getting a 10mm drill bit and my cordless drill. The bit is just large enough to get stuck in the piston, the turning thereof served to clean the bore very nicely, no further sanding was necessary. Beware the spring is coming at you as well, that should also be in the replacement kit. Getting the lever back in was simple after I realised that the rubber seal needed to be extended all the way out. The spring pushes the piston out too far to mount the seal in the end position. You might want to put something soft on the ground just in case you drop the lever which I did several times. Pushing the piston in and getting the lever the right way around the brake light switch took me a few tries, so there may be a possibility to actually break the lever during that rather hair- raising step in the assembly. I've actually done a lot of the big repairs on my bike (1994 R1100GS with abs) like the clutch and the generator (sounds simple, doesn't it) but this was one of the repair jobs that I wasn't sure I was going to be able to do correctly. All said and done, it was really well worth the effort as the brakes work much better all around. Many thanks to the author for the information, hope this helps someone else as well.

Thanks a TON for your video. Thanks to your demonstration my son and I were able to replace the plunger and finally have brakes again after a long time dreading this project. Unlike your kit, mine did contain the dust cover but we didn't discover it until after everything was reassembled.

I really don’t- as you can see, I just start replacing parts until it all works

I bought a 1100 gs 1996 without seeing it yet. The owner said that the front brake are faulty... he changed the fluid but i think he said that the brakes can still brake itself. Do you know what can it be ?