ok, progress to date. replaced worn friction plates with new Rekluse friction plates. replaced original (13yr old) pressure plate springs with new OEM springs. STILL slipping.
ordered new, stiffer EBC pressure plate springs. was told they are 10-15% stiffer than OEM which makes me 10-15% stiffer at the thought I might actually get to ride/race again soon. but nevermind that.
guy at Rekluse thinks it's a spring issue. Local shop guy I trust here in OH agrees. and all other symptoms seem to support that theory. so when they arrive, I'll try them out and report new findings.
- frustrated and shopping