I think he's talking about what my SP1 does on rare occasion. As you ease the clutch out, it will suddenly grab and launch forward, unless you're real fast and pull the clutch lever back in. Have you thoroughly cleaned your slave clylinder (including the seals and cups) and have fresh DOT4 in there? If so, just change your engine oil. Honda HP4S, Mobil-1 4T, and Amsoil are all good choices. I've used the first two. When my oil gets near time to change, my clutch will start to do that rare judder/launch. Change my oil and it goes away till I've got at least 2000 miles on the oil.
I think this is called judder. And I think it's a SP1 thing. The SP2's have a judder spring/seat in the clutch plates/discs, that I understand was to address this. Not real sure on that, but I haven't yet heard of SP2's having this problem.
I'll change my original clutch of 24K miles, out this winter. I'm going to use a Barnett kit; plates, discs and springs. Hopefully that will cure it, cause altho it happens rarely, it's a little unnerving...
Hope after all that, my diagnostic was right?