Chattering problem with HKS GD Pro Twin clutch

[Wolf_Tm250]

Hello List,

I have a problem with that clutch...

I'm getting very harsh and istant clutch disengagement and loud clunking on downshifting on low gears.... even if I release slooooooooooooooooowly the clutch pedal.
And it happens only downshifting on short gears.

I already checked for the exhaust touching somewhere in the crossmember zone, and it isn't.
Moreover I'm getting this noise from the clutch zone.

I checked the pedal, and I already have the leverage to be the longest possible...

I changed the oil already two times, looking for bubbles in the circuit.

Have you got any idea ?

I'm going to think it could be an front engine bushing problem...
upshifting and releasing the clutch, the engine turns backward, but downshifting and releasing, the engine moves forward:
the front engine bushing it's new, but it could be possible that I gave it not enough preload ( there is a "buttonhole" on the front bushing support, and an arrow on it tells you to push up the engine and then tighten the bushing bolt )
Tomorrow I'll change it with one stronger to see what happen...

Thank you, bye...

[Dell'Orto]

Twin plate clutches do chatter a bit, but yeah, check that mount and see if that makes a difference