I will research your serial number and get back to ya. If you are building a full blown straightbar hanging jewel tank Autocycle or Super Deluxe Cantilever hanging tank Autocycle, you will need a double adjustable stem, speedo bar (good luck), sawtooth sprocket and dogleg crank, and a feather guard. If you are doing a standard hanging tank Canti Autocycle, you can use a razor stem, crossbraced Torrington handlebars, and a feather guard. I have reproduction hanging Cantilever tanks, a razor stem, wheel set, crank and sprocket, and the crossbrace bars available for sale. PM me for more 411