spongy

I am having a problem with the clutch on my 570 acting up when the engine gets hot. It's as if there is air in the system, the clutch lever will act like it has air in it progressively until the lever goes to the bars. Pump the lever 3 or 4 times and the clutch comes back...wait a couple of mins...

I have an '05 fs650e supermoto with the new radial caliper which works very well----------but despite changing the fluid and bleeding the system I find the lever still quite spongy-even coming back to the bar although I must admit at that stage the front tyre is squealing and about to put me...