In 1901, 20-sano jir ah William S. Harley qorshaystay qorshe loogu talagalay engine yar oo leh rarka ah ee 7.07 inches cubic (116 cc) iyo afar-inch (102 mm) flywheels loogu talagalay isticmaalka in a jir caadiga ah baaskiil-baaskiil. In ka badan laba sano ee soo socota, isaga iyo saaxiibkiis carruurnimada Arthur Davidson ka shaqeeyey on ay motor-baaskiil isticmaalaya dhinaca woqooyi ee Milwaukee mashiinka dukaanka ee guriga saaxiibkood Henry Melk. Waxaa la dhamaystiray 1903 iyadoo la kaashanayo Arthur ee walaalkiis Walter Davidson. On tijaabinta ay korontada-baaskiil, Harley iyo walaalaha Davidson ogaaday in ay u awoodin in ay fuulaan buuraha ku wareegsan Milwaukee oo aan caawimaad ka pedal, oo waxay ku qoray off ay motor-baaskiil ugu horeysay sida tijaabo waxbarasho qiimo leh. Saddex bilaabay shaqada on engine cusub oo la hagaajiyay 24.07 cubic inches cubic (405 cc) iyo afar-inch (102 mm) flywhe
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