Yamaha 80-175cc Piston-Port Motorcycle (1968-1976) Service Repair Manual Description Clymer motorcycle repair manuals are written specifically for the do-it-yourself enthusiast. From basic maintenance to troubleshooting to complete overhaul Clymer manuals provide the information you need. The most important tool in your tool box may be your Clymer manual get one today.Every Clymer manual contains hundreds of original photographs and illustrations developed from a complete disassembly and assembly of a motorcycle. This in addition to extensive research allows Clymer to achieve an unmatched level of detail accuracy and clarity.The step-by-step instructions and two-column text with large print are user-friendly. Bold figure numbers make it easy to quickly match instructions with illustrations and photos. Thumb-tabbed chapters numbered table of contents and an extensive index make it possible to locate the desired section quickly. Contents This Yamaha Vintage Motorcycle Manual is 168 pages. QUICK REFERENCE DATA CHAPTER ONE / GENERAL INFORMATION Manual organization / Service hints / Safety first / Tools / Expendable supplies / Mechanic s tips CHAPTER TWO / PERIODIC MAINTENANCE Engine tune-up / Spark plug / Compression test / Carbon removal / Breaker pints / Magneto ignition timing / Air cleaner service / Fuel strainer / Carburetor adjustment / Autolube pump adjustment / Battery service / Oil change / Clutch adjustment / Drive chain / Brakes CHAPTER THREE / ENGINE TRANSMISSION AND CLUTCH Two-stroke operating principles / Engine lubrication / Preparation for engine disassembly / Engine removal / Cylinder and cylinder head / Piston pin and rings / Reed valve / Flywheel magneto and starter/generator / Engine sprocket / Right crankcase cover / Clutch / Primary drive gear / Kickstarter / Tachometer drive gear / Shifter / Crankcase / Transmission / Crankshaft CHAPTER FOUR / CARBURETORS Carburetor operation / Carburetor overhaul / Carburetor adjustment / Miscellaneous problems CHAPTER FIVE / ELECTRICAL SYSTEM Flywheel magneto operation / Magneto troubleshooting / Capacitor discharge ignition (CDI) / Starter/generator / Lights / Horn / Main switch / Battery CHAPTER SIX / CHASSIS SERVICE Wheels / Brakes / Front fork / Steering head / Rear suspension / Drive chain CHAPTER SEVEN / TROUBLESHOOTING Operating requirements / Starting difficulties / Poor idling / Misfiring / Flat spots / Power loss / Overheating / Backfiring / Engine noises / Piston seizure / Excessive vibration / Clutch slip or drag / Poor handling / Brake problems / Lighting problems / Troubleshooting guide APPENDIX / SPECIFICATIONS INDEX Wiring diagrams Models covered: 1968 1969 1970 Yamaha AT1 Series 1972 Yamaha AT2 SERIES 1973 Yamaha AT3 1973 Yamaha ATMX 1969 1970 1971 1972 Yamaha CT1 Series 1972 Yamaha CT2 1973 Yamaha CT3 1974 1975 1976 Yamaha DT100 1974 1975 1976 Yamaha DT125 1974 1975 1976 Yamaha DT175 1973 Yamaha GT1 1974 1975 1976 Yamaha GT80A 1974 1975 1976 1977 Yamaha GT80MXA 1973 1974 Yamaha GTMX 1974 1975 Yamaha MX100 1974 1975 1976 Yamaha MX125 1974 1975 Yamaha MX175 1976 Yamaha YZ100 1974 19751976 Yamaha YZ125 1974 1975 1976 Yamaha YZ80 Clymer Manuals Yamaha AT1 Series Manual Clymer Manuals Yamaha AT2 Series Manual Clymer Manuals Yamaha AT3 Manual Clymer Manuals Yamaha ATMX Manual Clymer Manuals Yamaha CT1 Series Manual Clymer Manuals Yamaha CT2 Manual Clymer Manuals Yamaha CT3 Manual Clymer Manuals Yamaha DT100 Manual Clymer Manuals Yamaha DT125 Manual Clymer Manuals Yamaha DT175 Manual Clymer Manuals Yamaha GT1 Manual Clymer Manuals Yamaha GT80A Manual Clymer M...