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Softcover – 370 pages – Yamaha PW50 PW80 Y-Zinger BW80 Clymer Owners Service Repair Manual Covers the following Models: Yamaha PW50 Y-Zinger 1981-1983 1985-1987 1990-2002 Yamaha PW80 Y-Zinger 1983 1985 1991-2002 Yamaha BW80 Big Wheel 1986-1988 1990Contents: QUICK REFERENCE DATA GENERAL INFORMATIONManual organization / Notes cautions and warnings / Message to parents / Safety first / Cleaning parts / Handling gasoline safely / Service hints / Serial numbers / Warning labels / Torque specifications / Fasteners / Lubricants/ Sealants cements and cleaners / Threadlocking compound / Expendable supplies / Basic hand tools / Precision measuring instruments / Test equipment / Special tools / Mechanic #39;s tips / Ball bearing replacement / Seals / Specifications TROUBLESHOOTINGOperating requirements / Engine operating principles / Starting the engine / Starting difficulties / Engine starting troubles / Engine performance / Engine / Engine noises / Two-stroke leak down test / Fuel system / Electrical troubleshooting / Ignition system / Clutch and gearshift linkage / Transmission / Kickstarter / Drive train noise (PW50) / Drive train noise (BW80 and PW80) / Oil injection system / Handling/ Brakes / Specifications LUBRICATION MAINTENANCE AND TUNE-UPService intervals / Tune-up / Engine oil / Transmission oil / Air filter / Spark plug / Carburetor / Exhaust system / Oil pump and engine oil lines / Engine compression check / Ignition timing / Control cable lubrication / Throttle and oil pump cable adjustment / Speed limiter adjustment / Brake lubrication inspection and cable adjustment / Final gear lubrication PW50 / Drive chain BW80 and PW80 / Front fork oil change BW80 and PW80 / Specifications ENGINE PW50Engine identification / Engine lubrication / Exhaust system / Cylinder head / Cylinder / Piston pin and ring / Reed valve assembly / Clutch / Primary drive gear / Kickstarter oil pump drive gear and kick pinion gear / Transmission / Crankcase and crankshaft / break-in / Specifications ENGINE BW80 AND PW80Engine identification / Engine lubrication / Exhaust system / Engine / Cylinder head / Cylinder / Piston piston pin and piston ring / Reed valve assembly / Primary drive gear and oil pump drive gear / Kickstarter / External shift mechanism / Crankcase and crankshaft / Transmission / Break-in / Specifications CLUTCH BW80 AND PW80Right crankcase cover / Clutch service more here…..

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