Had my 064 running it was struggling some blubbered almost died pulled it out of the cut and chain was going backward saw idling??? What causes this. Its a saw wife got me on ebay 300 bucks brand new 32" bar and chain. Figure bar and chain worth $100 so a running project saw for 200 bucks not to bad. I love the size and feel of the 064 so I want to rebuild from ground up it feels like a powerful 044. Not the power of my 066 but definitely feels more nimble in the hand.