Not looking for an argument, but I disagree with using a hone or any other abrasive tool to size a bearing. Bearing material is too soft and will get imbedded with abrasive leading to wear.
The number one killer of rocker shaft bushings is not enough oil pump.
If you are running bushed rockers or plain rockers (alumimum or even ductile iron) you need to get the oil volume and pressure up at low engine speeds.
