just started havin' this problem on my 97 ZR 580 EFI. My clutch engagement went from a normal of 5000 to 5700 in a matter of minutes on my ride last weekend. Any ideas if my clutch is hanging up or anything like that.
Second question, sled starts breaking up at about 6500RPM, almost like it's fouling a plug. only prob is that the plugs aren't fouled. burning nice. i changed them and problem went away--- for seventy miles now it's back could it be a bad set of plugs or something bigger.
please help me, winter isn't long enough to have broken sleds

Check your primary Clutch. It almost sounds like it's going. Check the spring, bushings, give it a cleaning.