[Kurlon]

So, doing a little research on one Mr Cameron, I find he's a moto journalist with a tuning background based on older two strokes. (This is backed up by the EXUP valve comments, exhaust valves on 4 stroke bikes are typically installed just to meet noise tests, not for performance... That also matches his pipe theory, most two smoke 'race' systems were built for higher throttle openings, with the machine turning near peak power. It's not the only way to build a pipe though.)

Why is his opinion carrying more weight than others? You seemed to have fixated on it, ignoring any opinions as to why it might not be 100% dead on rather than having the fun technichal discussion this could be. We can't have a good debate if every responce is 'Nuh uh, Kevin said it was this.'