<VV> Boring-more heat?

[Padgett]

>Someone once told me that when you bore things (we
>were talking about an air-cooled motorcycle at the
>time)  they tend to run at higher temps.

Never really studied it but you have slightly increased the charge (more 
BTUs on combustion) and the ring wiping friction has also gone up slightly. 
Of course any specific overbore (e.g. .030") will have proportionally more 
of an effect on a small bore engine than a large bore.

Padgett