[blueridgerunner]

my 1200 has dot 3 only stamped on the lid, would it be better to use a dot 4 fluid

My 87 GL1200 says DOT 4. Maybe PO put a different lid on? I ended up not only flushing the system but rebuilt MC & SC. Pay attention to the smaller hole that has the metal shield thing stuck on top. Mine was plugged solid with some kind of aluminium corrosion and had to be cleaned out (I used welding tip cleaner wires). Otherwise, the fluid won't return to MC and eventually into the ride the clutch has built up pressure (you will have zero play at the lever when there should be a little) and the clutch will slip, badly. I have been through the clutch hydraulics from one end to another, brakes too.