How to adjust the valve of Orville 1 1 liter 420 HP engine?

The first method is cylinder by cylinder adjustment. Loosen the adjustment screw first, then tighten the screw shaft with a screwdriver, and then tighten it to the ground after determining the adjustment position. Then, adjust the intake and exhaust valve clearance, and then gradually adjust the valve clearance of other cylinders according to this method.

The second method is two adjustments. Insert a thickness gauge between the valve stem end and the rocker arm, pull it back and forth, and tighten the screw to adjust it. If you feel slight resistance, check and adjust the valve clearance according to the cylinder, which is more accurate. This adjustment method saves time and effort, but it requires higher maintenance personnel.