VFR750 Cylinder 3 no run and knock - Low RPM

I am using a known good running carb - Fuel is there. Timing appears to be correct - All arrows on the front and rear heads are aligned to the T2 mark. Spark is there as well. All other cylinders are firing fine. No visible marks on any of the cam lobes and plenty of oil. Out of ideas and need suggestions what to check next.