Na'urar busa galibi ta ƙunshi sassa shida masu zuwa: Motar, tace iska, jiki mai busawa, ɗakin iska, tushe (da tankin mai), bututun ruwa. Mai hurawa ya dogara da aikin eccentric na rotor mai son zuciya a cikin silinda, kuma canjin ƙarar tsakanin ruwan wukake a cikin ramin rotor zai tsotse ciki, damfara kuma ya tofa iska. A cikin aiki, ana amfani da bambance-bambancen matsa lamba na busa don aika lubrication ta atomatik zuwa bututun ruwa, drip a cikin silinda don rage juzu'i da hayaniya, yayin da ake ajiye iskar gas a cikin silinda baya dawowa, irin waɗannan masu busa kuma ana kiran su masu busa-busa-vane.
