sounds like the clutch fluid boiled... the stainless steel clutch line is only $30 from Z1
here, but I believe you would still need to insulate it somehow because of your HFCs.
**edit** maybe DR or someone can say whether the Motul brake fluid (I think up to 600F) or ATE Super Blue (up to 500F) can withstand the temps or if you still need to insulate the line. I was planning to do a brake and clutch flush with ATE Super Blue, but the dealer did the brakes w/o my permission
so I'm putting it off. I like alternating the ATE Gold and Blue because it makes it easier to tell when the flush is complete