Well, gentlemaen, everyone seems to be talking turkey here., so does anyone know what the implications of Electronic Fuel Injection (made I must assume for the stock spec'd engine) are when applied to the same engine now with increased port capacity and flow through? Will the same EFI unit work? You can't exactly rejet it like a carb, or put on a a bigger throttle body /carb (again forgive me if I am using wrong terms here.....not a mechanic) Would a "Power Commander " fuel mapping unit automatically self script as you ride the enhanced set up and compensate for this (as the makers suggest it would for the combination of free flow exhaust and low resistance air filters) ? In other words though Scooter Bob is testing the Power commander and I assume some form of free flow exhaust /filter combos, "Bolt ons" I don't see this as an either/ or option. Those mods could be level one, but I think they would all be part of the higher levels of hardware mods too, for the reasons noted above.
And Ace, though I take the point that a CNC kit could never mactch an expertly polished and ported head, could this be a optional machine copied " standard" for the larger market , and hand finished "deluxe" type choice for the purists. I would think tjhe big CNC cost would be in the set up of first one, and the at it would get less expensive with every copy produced. So if a "pretty good" machine copy template could be be achieved, then it would reduce the cost for both the purists and those satisfied with "standard" improvement. Nigel ,