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Softcover – 320 pages – Yamaha DT100 DT125 DT175 DT250 DT400 MX100 MX175 1977 – 1983 Clymer Owners Service Repair Manual Covers the following Models: DT100 (1977-1983) DT125 (1978-1981) DT175 (1978-1981) DT250 (1977-1979) DT400 (1977-1978) MX100 (1979-1983) MX175 (1979-1981)Contents: QUICK REFERENCE DATA GENERAL INFORMATIONManual organization / Service hints / Torque specifications / Safety First / Special tips / Parts replacement / Expendable supplies / What year is it? / Serial numbers / Basic hand tools / Tune-up and troubleshooting tools / Fasteners / Mechanic #39;s tips / Specifications TROUBLESHOOTINGOperating requirements / Troubleshooting instruments / Emergency troubleshooting / Engine starting / Engine performance / Engine noises / Excessive vibration / Two-stroke pressure test / Front suspension and steering / Brake problems LUBRICATION MAINTENANCE AND TUNE-UPRoutine checks / Pre-checks / Tyres and wheels / Battery / Periodic lubrication / Checking engine oil / Transmission oil checking and changing / Front fork oil change / Drive chain lubrication / Periodic maintenance / Monoshock adjustment / Drive chain adjustment / Clutch adjustment / Autolube oil pump adjustment / Throttle adjustment / Air cleaner / Pulsating Air System (air injection) – DT250F only / Engine tune-up / Cylinder head nut torque / Spark plug / Ignition timing (CDI – capacitor discharge ignition) / Ignition timing (breaker point ignition) / Idle speed adjustment / Exhaust decarbonizing / Storage / Specifications ENGINEEngine principles / Engine lubrication / Engine cooling / Servicing engine in frame / Cylinder head / Cylinder / Piston piston pin and piston rings / Break-in procedure / Magneto / Oil pump / Reed valve assembly / Compression release (DT 400D only) / Crankcase and crankshaft / Kickstarter / Service and adjustment / Specifications CLUTCH AND TRANSMISSIONClutch / Clutch cable / Clutch release (push lever) mechanism / External shift mechanism / Transmission and internal shift mechanism / Specifications FUEL AND EXHAUST SYSTEMSAir cleaner / Carburetor service / Carburetor operation / Carburetor adjustments / Fuel shutoff valve / Fuel tank / Fuel filter / Exhaust system / Exhaust system decarbonizing / Exhaust system repair / Specifications ELECTRICAL SYSTEMCharging system (DT series only) / Battery / Magneto / Voltage regulator (DT series only) / Rectifier (DT series additional info…..


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With this piston retaining tension and insert the must only be removed.