把缸盖上的进气口和排气口两侧的M8双头螺栓拧下,将研磨好的气门、气门座擦净,把气门插入相应的气门导管中,然后把缸盖侧立在平台上(以便用嘴吹),再取一张干净的纸,中间剪一20毫米的孔(以免用嘴吹时沾上油污),盖在缸盖的进气口上,右手抵住气门大头,左手扶住缸盖,嘴对着用纸盖的气门口用力吹。 Unscrew the M8 stud bolts on both sides of the air intake port and exhaust port on the cylinder head, wipe the polished valve seat and valve seat, insert the valve into the corresponding valve guide, and then lift the cylinder head side on the platform (In order to blow with the mouth), then take a piece of clean paper, cut a 20 mm hole in the middle (so as not to smear grease when blowing), cover the intake port of the cylinder head, right hand against the valve head, left hand Hold the cylinder head, blow the mouth against the paper cover valve.