Wang Ye Shang Ling 125 pedal, how to adjust the valve clearance? How big is the adjustment? How to adjust with a feeler gauge?

For Wang Ye pedal 125 motorcycle, the gap between intake valve and exhaust valve is 0.05-0.08mm, 0.07-0. 12mm, and the gap between exhaust valve is slightly larger than that of intake valve, while that of scooter is generally slightly larger than that of other vehicles with the same displacement. The feeler gauge generally has this specification, or when you buy a feeler gauge, you can ask the seller for a gauge between 0.05-0. 13mm. To adjust the valve clearance, first adjust the valve timing, open the cylinder head and loosen the locking screw of the valve adjusting screw, then turn the adjusting screw and put the feeler gauge between the adjusting screw and the valve stem until it feels tight (not too tight) in the adjusting screw. The feeler gauge can be pulled out smoothly with little resistance, and finally the adjusting screw is tightened. The adjustment of valve clearance requires some maintenance experience, and it is best for non-maintenance personnel not to adjust it by themselves to avoid accidental injury to the engine.