NeodyTone

Over the summer, I rebuilt my clutch master cylinder. Recently, the clutch has been slipping under high load, but only when the engine water temp is over 190 F. The clutch lever has zero play no matter how I adjust the thumbscrew on the handle. It makes me think the clutch plates are not fully engaging because the clutch slave cylinder still has hydraulic oil pressure on it. If this is the case, is there any way to adjust this condition? Possibly too much oil in the master cylinder? Maybe the clutch plates are shot and I just don't want to admit it? The bike just rolled past 20,000 miles, I bought it used with 16,000 on it. Any thoughts/advice is greatly appreciated, thanks!