1984 - 1986 GS550E PDF module rebuild

[fbody_mike]

This is probably the same for the mid 80s 1150E, although they have different part numbers the basic construction looks to be the same, the internal dimension may be different. So measure to be sure.
Mine was leaking from the top indicating the u-cup seal was leaking. The replacement seal is a typical shaft seal (16x24x4mm), available at many places online.

[dorkburger]

Nice, thanks for the write up.

I partially gutted mine to disable them as a part of the cartridge emulator upgrade - the emulator takes control of fork action so the pdf is only needed to connect the ports, or they can be replaced by a block off plate with a channel machined on the inside to connect the ports. They can simply be left alone as well, but I couldn't leave it alone......

I removed the parts restricing flow, left those needed to keep them sealed. I got lucky so far using existing parts on hand.