{"product_id":"1981-yamaha-yamahopper-service-repair-manual","title":"1981 Yamaha Yamahopper Service and Repair Manual","description":"\u003cp\u003eYamaha kept the Yamahopper in one service book for its 1979 through 1981 run, and LIT-11616-01-31 is that book. The 1981 machine is coded QT50H.\u003c\/p\u003e\u003cp\u003eRestoring one of these is mostly a matter of knowing what the factory intended, and that is precisely what the manual supplies: the maintenance schedule as written, engine disassembly and reassembly in sequence, carburetor and ignition settings, chassis and brake procedures, and the wiring laid out clearly enough to trace on a bench.\u003c\/p\u003e\u003cp\u003eTorque figures, clearances and service limits are given as original specifications. Verify QT50H against your paperwork first — the three years are close but not identical, and the manual distinguishes between them where it counts. After that, the numbers inside are the ones to hold the machine to.\u003c\/p\u003e","brand":"FactoryManual","offers":[{"title":"Default Title","offer_id":49083140964574,"sku":"YAMAHAYAMAHOPPER1981SRM","price":18.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0774\/4113\/8910\/files\/1981-yamaha-yamahopper-service-repair-manual_ccfbf469-5e88-46f9-be92-346f6dd00720.png?v=1789926210","url":"https:\/\/factorymanual.com\/products\/1981-yamaha-yamahopper-service-repair-manual","provider":"FactoryManual","version":"1.0","type":"link"}