Thank you.thank you, thank you..The advice worked on my sp1 also!!!! I have a 2001 sp1 with only 290 miles on it.. After riding for 15 minutes, and parking it and starting again, the clutch would slip under hard acceleration..I was about to tear the clutch apart until I saw this thread.. Master was totallly clogged with goo. Even though a "sealed" system, the fluid does break down after long storage. It also cured the late release point at the clutch lever.. Great Advice!!!!no problem man. it's a common issue. when the port plugs it closes the system. as the clutch fluid heats and expands it has nowhere to go (it would normally just flow into the reservoir) so it extends the slave and disengages the clutch.
glad it's all sorted out.