So, about a year ago, I installed a performance clutch and lightweight flywheel. Now, I'm beginning to experience what's supposedly called clutch chatter/shutter. It happens only when I launch. Sometimes it can be pretty bad.. But sometimes I don't feel it all. It all depends on how I work the clutch and the RPM's. I'm pretty sure it's cleaner at higher RPM'S. So, why did this start happening, and how can it be fixed?