Yamaha 250-400cc 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 Does not include wiring diagrams. This Yamaha vintage motorcycle manual is 168 pages. QUICK REFERENCE DATA CHAPTER ONE / GENERAL INFORMATION manual organization / Service hints / Tools / Expendable supplies / Mechanic s tips / Safety first CHAPTER TWO / PERIODIC MAINTENANCE Engine tune-up / Spark plug / Compression test / Carbon removal / Breaker points / Magneto Ignition Timing / CDI timing / Air cleaner service / Autolube pump adjustment / Throttle cable adjsutment / Battery service / Oil change / Clutch adjustment / Electrical equipment / Drive chain / Brakes / Wheels and tires / Steering head bearings CHAPTER THREE / 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 CHAPTER FOUR / ENGINE TRANSMISSION AND CLUTCH Two-stroke operating principles / Engine lubrication / Preparation for engine disassembly / Engine removal/installation / Cylinder and cylinder head / Piston pin and rings / Reed valve / Compression release / Magneto / Engine sprocket / Right crankcase cover / Autolube pump / Clutch / Primary drive gear / Kickstarter / Tachometer drive / Omni phase balancer / Shifter / Crankcase / Transmission / Crankshaft / Bearings and oil seals CHAPTER FIVE / CARBURETORS Carburetor operation / Overhaul / Adjustment / Miscellaneous carburetor problems CHAPTER SIX / ELECTRICAL SYSTEM Flywheel magneto / Capacitor discharge ignition / Ignition coil / Choke coil / Lights / Horn / Main switch / Battery CHAPTER SEVEN / CHASSIS SERVICE Wheels / Rear sprocket / Brakes / Front fork / Steering head / Rear suspension / Drive chain APPENDIX 1 / SPECIFICATIONS INDEX SUPPLEMENT FOR UNITED KINGDOM Models covered: 1968 1969 1970 1971 1972 1973 1974 1975 1976 Yamaha DT1 Series 1968 1969 1970 1971 1972 1973 1974 1975 1976 Yamaha DT2 Series 1968 1969 1970 1971 1972 1973 1974 1975 1976 Yamaha DT250 1968 1969 1970 1971 1972 1973 1974 1975 1976 Yamaha DT3 1968 1969 1970 1971 1972 1973 1974 1975 1976 Yamaha DT360 1968 1969 1970 1971 1972 1973 1974 1975 1976 Yamaha DT400 1968 1969 1970 1971 1972 1973 1974 1975 1976 Yamaha MX250 1968 1969 1970 1971 1972 1973 1974 1975 1976 Yamaha MX360 1968 1969 1970 1971 1972 1973 1974 1975 1976 Yamaha RT1 Series 1968 1969 1970 1971 1972 1973 1974 1975 1976 Yamaha RT2 Series 1968 1969 1970 1971 1972 1973 1974 1975 1976 Yamaha RT3 1968 1969 1970 1971 1972 1973 1974 1975 1976 Yamaha YZ250 1968 1969 1970 1971 1972 1973 1974 1975 1976 Yamaha YZ350 1968 1969 1970 1971 197...