Make sure the Z-bar is fixed in space and that nothing is rubbing on any of the linkages, and that the engine is tied down and cannot torque over to jam anything up.
I wouldn't be in a hurry to shelf the OEM unit...........yet. Especially since you didn't mention stink and smoke.
Thanks I have an appointment at the performance garage to look at it... he thinks it's just adjustment.. however if you just press on the clutch slightly you can feel vibration though your foot... Is that normal or is it the throw out bearing
Anyways he check it out... he is a good mechanic and doesn't believe in replacing stuff if it's not broken