> OK Hopper et all,
> My understanding of "over square" is that the swept area of the piston is
> longer than the bore of the cylinder. An "under square"
> engine is one that has a bore larger than the swept area of the piston.
> Please correct me if I'm wrong and explain please.
>
> Thanks,
> Gary '01 ST4 Gaston, OR
Being pedantic it is comparing the diameter of the bore to the stroke, not the area. In this case it's something like 112mm bore vs. 65mm stroke, so nearly 2:1. As previously stated this tends towards power higher up the rev range, but in a sporting Ducati motor there is very little flywheel effect already and they perform best in the upper part of their rev range. Even on my cooking Ducs they're not really happy below 4K....
IanE
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