Clutch won't disengage

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It is either the clutch plates coming apart or the oil scavenger pump pickup is clogged leaving too much oil in the clutch housing. Either way you have to pull the clutch.

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Hey Marc, been there, done that...in my case (as Dave above mentioned) it was the center damper plate that grenaded on me. Clutch wouldn't fully disengage no matter what I adjusted. On a positive note, on the 1100 (and I believe the 1200) you can get the clutch pack out without pulling the engine. Lots of info here on it...

Dave

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was the motorcycle parked for a long time ?

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Marc, I know you have a GL1200 but this might help. My friends 1996 GL1500 clutch got really hard to disengage. It eventually got almost impossible to pull the clutch lever to the hand grip.

We found the rivets had broken on the clutch damper plates. This allow the damper plates to pile up and create constant pressure against the clutch disc's. Therefor the clutch would not disengage. We installed new damper plates and new clutch disc's and that resolved the problem.

Of course we cleaned everything up including the slave cylinder and installed new gaskets and seals.