How do you adjust valve clearance for RF 8 engine?

To adjust the valve clearance for an RF 8 engine, you will need to follow these steps:

1. Start by removing the valve cover to access the valves.
2. Rotate the engine to the top dead center (TDC) position for the cylinder you are working on.
3. Measure the clearance between the valve stem and the rocker arm using a feeler gauge, and adjust as necessary by loosening or tightening the adjusting screw on the rocker arm.
4. Once the correct clearance is achieved, tighten the lock nut to secure the adjustment.