You are about to report the comment below to the Crash.Net moderators as being abusive.
An abusive comment may contain profanity, personal attacks or commercial SPAM.
Please do not report this comment as being abusive if you simply disagree with the
comment posted. If this is the case then you can click on the "disagree" icon () in the upper right
of the comment's post to show your dissatisfaction.
Crash.Net moderators will view all reported comments and will act as they deem necessary.
This may be editing the comment or total deletion.
Power, or horsepower as is often quoted, is not a product of displacement. It is a measure of work (torque) over time (in this case rpm). In order for a twin to compete with a four of similar displacement, it has to be able to rev to similar numbers. (Approx. rpm BMW-14,000, Duc 10,000) To achieve this the valves have to be huge, so that they can allow the engine to pump that much air, (commonly measured in cubic feet per minute, cfm) at that rpm. In order to have such huge valves the bore must be increased and the stroke reduced. The problem for conventional valve train designs is that valve springs cannot cope with such heavy valves at such high rpm. Ducati use a mechanical system to open and close their valves, so no valve springs, and also no loss of power from having to depress those springs. Checa is not riding the most powerful bike. He is riding the easiest bike to go fast on. If Rossi was riding the Aprillia who would be leading the championship?