Quote:
Originally Posted by EdKiefer
For sure 2 cylinder made from manufactures are balanced , like all the motorcycle engines , but that not going to stop them from vibrating Harley's are good example .
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Harleys are a BAD example. Any decent motorcycle with 2 jugs runs smooth as silk. Harley has a crank that would be great if there were 3 cylinders, instead there are 2; ie, the rods are opposed by 120 degrees instead of 180 degrees.
A properly balanced 600 cc 1 cylinder can run perfectly smooth. And I've had a 6 cylinder Ford 4.0L and a GM 3.8L both running on 3 cylinders, and while they lacked power, they were smooth since it was every other cylinder in the firing order that was disabled.