Matsayi mai canzawa (5-28bar) don mafi kyawun sassauci don saduwa da lokuta daban-daban.
Famfu mai sarrafa crankshaft tare da pistons mai rufin yumbu don tsawon rayuwar sabis.
Babban gilashin gani na matakin mai, mai sauƙin isa don duba matsayin mai, kuma a shirye don canjin mai a lokacin kiyayewa.