Impamvu nyamukuru zo kubogama kwa piston nizi zikurikira:

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. kutabangikanya kumirongo ibiri yo hagati yikinyamakuru gihuza ikinyamakuru nikinyamakuru nyamukuru kirenga imipaka.

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. gutunganya inkoni ihuza umuringa ntago yujuje ibyangombwa bya tekiniki, kandi gutandukana ntibyakosowe.

(5) Umwobo wa piston pin ntusubirwamo neza; umurongo wo hagati wa piston pin ntabwo ari perpendicular kumurongo wo hagati wa piston, nibindi.