Basa re crankshaft counterweight (inozivikanwawo se counterweight) ndere kuenzanisa iyo inotenderera centrifugal simba uye nguva yaro, uye dzimwe nguva iyo inodzokorodza inertial simba uye nguva yaro. Kana aya masimba uye nguva pachadzo zvakaenzana, huremu huremu hunogonawo kushandiswa kudzikisa mutoro pakutakura kukuru. Huwandu, saizi uye kuiswa kwechiyero kuyerwa kunofanirwa kutariswa zvichienderana nenhamba yemasilinda ejini, kurongeka kwemasilinda uye chimiro che crankshaft. Huremu huremu hunowanzo kukandwa kana kuumbwa mune imwe ne crankshaft, uye iyo yepamusoro-simba dizeli chiyero chechiyero chinogadzirwa zvakasiyana kubva ku crankshaft uye yobva yabatanidzwa pamwechete.