Reply to "Clutch Vibration ??..."

Here's an off the wall solution that might be worth a try. Find someone that does prop balancing on aircraft engine/propeller assys and ask him if he can try to balance the clutch/flywheel assy through the inspection cover. On aircraft, it is a trial and error deal and takes some time. But a good prop balancer might be able to get it close. You can usually find one through a maintenance FBO in your area. Cost should be less than $250. He might not even charge you unless he can make it better.