Not running a polished intake was the thing back in the carb days for motors that never got the chance to warm up, such as drag race motors. The problem was keeping the fuel atomized. The newer bikes with fuel injection and straight shot ports do not have atomization issues.
As for Extruda hone, I never liked the concept on a head with horizional ports that have to make the sharp turn at the bowel, as the putty doesn't want to make that turn and I would thing it would screw up the long side radius. Hoewver, when the GSXR1000 came out I thought that may just work. I called and discussed it with them and they agreed to do a before and after test of just one intake port. We flowed a head then sent a head down there for them to do. I couldn't get them to send it back, finally when they did, three of the intakes had been hand ported, and one extruded honed. I guess they guy that did it was only supposed to hand port one port. So we knew that what we had was not just extrude honed, so we didn't even bother to flow it.
