Hi av8tor,

Was just wondering what method you use to check the balance of the crank/rod/piston assembly? Is there a simple way to static balance it to see where it's at or do you have some kind of hi-tech balancing machine like the engine shops use or what? One of my Ryobis has some unexplainable vibration and I'm starting to think that maybe it's an internal thing but I don't really know how to check it. Sorry if I missed something you may have already said but I don't see anything anywhere. Any help would be greatly appreciated...

Thank you,
Pete