[munchgsx]

I searched to see if anyone had this problem, seems like the answer is yes except I get a vibration with clutch in sitting in the driveway. Seems like between 3000 and 4500 rpm I get a very bad vibration. Balance shafts are removed and a stock rebuild was performed about 3000 miles ago. Here's what worries me, this started about 300 miles after I switch it to full synthetic Royal Purple. I'm having trouble putting my finger on what in the motor could cause the vibration. I'm hoping it's something clutch related but if it's not any idea's on what it might be otherwise are welcome? I've also check crank pulley, cams, and anything spinning that I can see and it all seems fine.

Nick