Yamaha QT50
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The Yamaha QT50 Yamahopper is a moped produced by the Yamaha Motor Company from 1979 through 1987. The 50 in the name is derived from the 50cc engine displacement. QT50s were popular in the late 1970s and 1980s because of their ease of use and maintenance, exceptional gas mileage, and legality in most U.S. states among pre-driving-age teenagers. QT50s and other mopeds are enjoying a resurgence in popularity due to their nostalgic appeal.