Rich you must have had a saw with a broken a.v. mount or a rough chain. The 064 is just as smooth as a newer MS660,460 or 440.
My early 064's from the 80's were just as light as today's MS460. My first 064 at 14.1 lbs was lighter then a 046 at 14.3
When the 066 was introduced in the early 90's I had a hard time getting used to it as it was quite a bit more bulky and heavier then the 064. Even with the dual outlet muffler the 066 didn't have that much more grunt.
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