I have 5 of these NEW in box just like OEM.
These are not the threaded easy install version.
$88 each + shipping
Full Version: FS 19mm master cylinder 4 left NOT - the easy install
Which part isn't threaded?
not threaded where the two tubes insert on the top! 
Oh boy - been through that on the 912. Air in garage still has blue tint several years later...maybe due to lack of skill on my part.
NOT THESE is what I'm trying to emphasize.
Got this from Doug;
Remove the reservoir clamp and pull the lines down as far as possible from underneath. This gives you a little more access to install the lines. With the grommets installed on the supply lines I use a small screw driver and go around each rubber grommet pushing it down into the hole of the MC. I usually have to go around each grommet several times and do it in stages. Too much force and you can poke through the rubber grommet. Install isn't too bad. Its not fun but once you know how to do it, it can go pretty quick.
Remove the reservoir clamp and pull the lines down as far as possible from underneath. This gives you a little more access to install the lines. With the grommets installed on the supply lines I use a small screw driver and go around each rubber grommet pushing it down into the hole of the MC. I usually have to go around each grommet several times and do it in stages. Too much force and you can poke through the rubber grommet. Install isn't too bad. Its not fun but once you know how to do it, it can go pretty quick.
PM'd
4 left
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