Recommend Timing We recommend setting the at 30BTDC when the magnet (LEAVING) the sensor antickwise.The ignition unit will automatic retard to 20BTDC up on startup at 100 RPM - 2000 RPM.The ignition unit will fire the plug twice for easy start.The ignition unit have an automatic curve up to 4000 RPM then after that it is 30BTDC (or your static timing that you set it at) we recommend 30BTDC