Oem 1957 1972 Harley Ironhead Sportster 900 Transmission Gearset Trap Door 54A Original Equipment)

Up for sale is a genuine oem harley davidson ironhead sportster 900 4 speed complete transmission gearset and trap door assembly. The cast aluminum trap door carries factory casting number 34845 54a and the 17 tooth countershaft first gear is factory stamped 35760 54a with the speedometer drive gear. This complete cassette transmission assembly is correct for 1957 to 1972 harley davidson ironhead sportster 900 xl xlh and xlch models and also cross references to 1954 to 1956 k and kh models. Please verify your specific mainshaft clutch style and case specs to confirm exact fitment for your build. ​This is a very clean used vintage oem engine takeoff assembly. It features genuine factory harley davidson stamped gears early splined mainshaft bronze shift forks shifter cam plate pawl carrier assembly and aluminum trap door. The mainshaft splines and threads are straight and clean and the gear teeth and engagement dogs show very nice square edges with normal light wear from age and use. The aluminum trap door has solid mounting holes with no cracks or welds. As with any vintage internal transmission assembly we recommend a thorough cleaning inspection and fresh bearings gaskets and seals prior to installation. You will receive the exact transmission assembly pictured.