1980 Yamaha Yamahopper Service and Repair Manual

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QT50G is the 1980 Yamahopper, documented in LIT-11616-01-31 along with the 1979 and 1981 machines. One part number, three model years.

The combined coverage suits these little bikes, since parts have been interchanged freely among them for decades and the code references inside help you work out which year a given component came from.

Identification

  • Yamaha part number: LIT-11616-01-31
  • Model code: QT50G
  • Years covered: 1979, 1980, 1981

The manual gives periodic maintenance and adjustment procedures, engine removal, disassembly and reassembly, carburetor and ignition work, chassis and brake service, and wiring diagrams. Torque values and service limits are the factory's own, stated as numbers to measure against rather than as general guidance — useful on a machine this small, where an over-tightened fastener does real damage.

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