[user removed]

Originally Posted by gil

Someone in here was riding a BMW 650cc bike named Teresa, he was getting impressive numbers. As far as I understand a single big cylinder is the most efficient. A automotive article from Car & Driver emphasized that 500cc cylinders, with long stroke, where becoming standard size for engines of the big car manufacturers. Weather it be a 4 cylinder or eight, 500cc per cylinder was determined to be the most efficient.

Why 0.5-Liter Cylinders Will Soon Dominate Automotive-Engine Design

gil

Details: Teresa - 2004 BMW F650CS Fuel Economy - EcoModder.com

regards
mech