Table Of Contents - Yamaha YZ250(N)/LC Owner's Service Manual

Table of Contents

Important Notice6
Safety Information6
Wichtige Hinweise7
F.i.m. Machine Weights10
How To Use This Manual12
Particularly Important Information12
Finding The Required Page12
Description12
Renseignements Generaux13
Chapitre13
Manual Format14
How To Read Descriptions14
Illustrated Symbols16
Index18
Table Of Contents20
General Information26
Engine26
Informazioni Generali27
Machine Identification28
Vehicle Identification Number28
Frame Serial Number28
Engine Serial Number28
Identificazione Del Veicolo29
Identification De La Machine29
Preparation For Removal And Disassembly30
Important Information30
Informations Importantes31
Silencieux31
All Replacement Parts32
Gaskets, Oil Seals And O-Rings32
Lock Washers/Plates And Cotter Pins32
Bearings And Oil Seals32
Circlips34
Checking Of Connections36
Controllo Dei Collegamenti37
Verification Des Connexions37
Special Tools38
Outils Speciaux40
Utensili Speciali44
Control Functions46
"Engine Stop" Button46
Clutch Lever46
Kick Starter46
Fonctions Des Commandes47
Front Brake Lever48
Rear Brake Pedal48
Fuel Cock48
Starter Knob (Choke)48
Funzioni Dei Comandi49
Valve Joint50
Detachable Sidestand50
Fuel And Engine Mixing Oil52
Essence Et Huile De Melange Du Moteur53
Starting And Break-In54
Starting A Cold Engine54
Starting A Warm Engine54
Mise En Marche Et Rodage55
Break-In Procedures56
Starten Und Einfahren57
Avviamento E Rodaggio57
Torque-Check Points60
Points De Verification De Couple De Serrage61
Cleaning And Storage64
Nettoyage Et Rangement65
General Specifications68
Chassis69
Maintenance Specifications70
General Torque Specifications79
Definition Of Units79
Caracteristiques Generales80
Carburateur Et81
Caracteristiques D'entretien82
Specifications Generales De Couple91
Definition Des Unites91
Moteur91
Technische Daten92
Allgemeine Technische Daten92
Wartungsdaten94
Allgemeine Anzugsdaten103
Definition Der Einheiten103
Coppia115
Definizione Delle Unità115
Cable Routing Diagram116
Diagramma Del Passaggio117
Schema De Cheminement Des Cables117
Kabelführungsübersichtplan117
Maintenance Intervals124
Regular Inspection And Adjustments124
Revisione Eregolazioni Regolari133
Intervalli Di Manutenzione133
Pre-Operation Inspection And Maintenance136
General Inspection And Maintenance136
Ispezione E Manutenzione Prima Del Funzionamento139
Coolant Level Inspection140
Coolant Replacement140
Motore141
Radiator Cap Inspection144
Radiator Cap Opening Pressure Inspection146
Coolant System Inspection146
Clutch Adjustment148
Throttle Cable Adjustment150
Throttle Lubrication150
Air Filter Cleaning152
Transmission Oil Level Check154
Transmission Oil Replacement156
Pilot Air Screw Adjustment158
Idle Speed Adjustment160
Muffler Inspection160
Silencer Fiber Replacement160
Brake System Air Bleeding164
Telaio165
Partie Cycle165
Front Brake Adjustment166
Reare Brake Adjustment168
Front Brake Pad Inspection And Replacement168
Rear Brake Pad Inspection And Replacement172
Front Wheel And Rear Wheel172
Roue Avant Et Roue Arriere173
Rear Brake Pad Insulator Inspection176
Brake Fluid Level Inspection176
Sprockets Inspection178
Drive Chain Inspection178
Drive Chain Slack Adjustment180
Front Fork Inspection182
Front Fork Oil Seal And Dust Seal Cleaning184
Front Fork Rebound Damping Force Adjustment184
Standart Position184
Front Fork Compression Damping Force Adjustment186
Rear Shock Absorber Inspection188
Bras Oscillant189
Rear Shock Absorber Spring Preload Adjustment190
Amortisseur Arriere191
Rear Shock Absorber Rebound Damping Force Adjustment192
Rear Shock Absorber Low Compression Damping Force Adjustment194
Rear Shock Absorber High Compression Damping Force Adjustment196
Tire Pressure Check198
Spokes Inspection And Tightening198
Wheel Inspection198
Steering Head Inspection And Adjustment200
Lubrication204
Electrical206
Spark Plug Inspection206
Parte Elettrica207
Ignition Timing Check208
Seat, Fuel Tank And Side Covers212
Seat, Fuel Tank And Side Covers Removal212
Sitz, Kraftstofftank Und Seitendeckel213
Side Cover Removal Points214
Seitendeckel215
Exhaust Pipe And Silencer216
Exhaust Pipe And Silencer Removal216
Auspuffrohr Und Schalldämpfer217
Tubo Di Scarico E Silenziatore217
Radiator218
Radiator Removal218
Kühler219
Radiator Handling Note220
Panel Removal Points220
Radiator Inspection220
Radiator Assembly And Installation222
Carburetor And Reed Valve224
Carburetor And Reed Valve Removal224
Vergaser Und Zungenventil225
Carburetor Disassembly226
Carburetor And Reed Valve Handling Note228
Throttle Valve Removal Points228
Pilot Air Screw Removal Points228
Carburetor Inspection230
Needle Valve Inspection230
Throttle Valve Inspection230
Jet Needle Inspection232
Float Height Inspection232
Float Inspection234
Reed Valve Inspection234
Reed Valve Assembly And Installation234
Carburetor Assembly And Installation236
Carburetor Installation242
Cylinder Head, Cylinder And Piston244
Zylinderkopf, Zylinder Und Kolben245
Piston And Power Valve246
Piston And Power Valve Removal246
Push Rod Removal Points248
Piston And Piston Ring Removal Points248
Cylinder Head Inspection250
Cylinder Inspection252
Piston Inspection252
Piston Pin And Small End Bearing Inspection254
Piston Ring Inspection256
Piston Clearance Inspection258
Combination Of Piston And Cylinder Inspection258
Power Valve Inspection260
Power Valve Hole On Cylinder Inspection260
Power Valve Assembly And Installation262
Piston Ring And Piston Assembly And Installation266
Cylinder Head And Cylinder Assembly And Installation268
Clutch And Primary Driven Gear274
Clutch Plate And Friction Plate274
Clutch Plate And Friction Plate Removal274
Primary Driven Gear, Push Rod And Push Lever Axle276
Primary Driven Gear, Push Rod And Push Lever Axle Removal276
Clutch Boss Removal Points278
Clutch Housing And Boss Inspection278
Primary Driven Gear Inspection278
Clutch Spring Inspection278
Primärabtriebszahnrad279
Friction Plate Inspection280
Clutch Plate Inspection280
Push Lever Axle Inspection280
Push Rod Inspection280
Clutch Assembly And Installation282
Primary Drive Gear Removal288
Kick Axle, Shift Shaft And Primary Drive Gear288
Kickstarterwelle, Schaltwelle289
Kick Axle And Shift Shaft290
Kick Axle And Shift Shaft Removal290
Primary Drive Gear Removal Points292
Kick Axle Assembly Removal Points292
Shift Guide And Shift Lever Assembly Removal Points292
Kick Axle And Ratchet Wheel Inspection292
Kick Gear, Kick Idle Gear And Ratchet Wheel Inspection294
Shift Shaft Inspection294
Shift Guide And Shift Lever Assembly Inspection294
Stopper Lever Inspection294
Stopper Lever Assembly And Installation296
Shift Guide And Shift Lever Assembly And Installation296
Shift Shaft Assembly And Installation298
Kick Axle Assembly And Installation298
Kick Idle Gear Assembly And Installation300
Primary Drive Gear Assembly And Installation302
Ypvs Governor306
Ypvs Governor Removal306
Ypvs Regler307
Governor Removal Points308
Governor Groove Inspection308
Bearing Inspection308
Governor Assembly And Installation308
Water Pump312
Water Pump Disassembly312
Impeller Shaft Removal Points314
Oil Seal Removal Points314
Impeller Shaft Inspection314
Impeller Shaft Gear Inspection316
Oil Seal Inspection316
Oil Seal Assembly And Installation316
Impeller Shaft Assembly And Installation318
Cdi Magneto320
Cdi Magneto Removal320
Laterali321
Rotor Removal Points322
Cdi Magneto Inspection322
Woodruff Key Inspection322
Cdi Magneto Assembly And Installation322
Engine Removal328
Silenziatore329
Radiatore329
Lamella329
Drive Sprocket Removal Points332
Engine Removal Points332
Engine Installation334
Brake Pedal Assembly And Installation334
Drive Sprocket Assembly And Installation334
Crankcase And Crankshaft338
Crankcase And Crankshaft Removal338
Pistone339
Segment Removal Points340
Crankcase Removal Points340
Crankshaft Removal Points342
Crankshaft Bearing Removal Points342
Crankcase Inspection342
Crankshaft Inspection344
Crankshaft Bearing Assembly And Installation344
Crankshaft Assembly And Installation346
Transmission, Shift Cam And Shift Fork352
Transmission, Shift Cam And Shift Fork Removal352
Trasmissione, Camma Del353
Transmission Removal Points354
Gears Inspection354
Shift Fork, Shift Cam And Segment Inspection356
Transmission Assembly And Installation356
Cambio357
Front Wheel Removal362
Ruota Anteriore E Ruota363
Motor363
Fahrgestell363
Rear Wheel364
Rear Wheel Removal364
Posteriore365
Ruota Anteriore E Ruota Posteriore365
Rear Wheel Removal Points366
Wheel Bearing Removal Points366
Wheel Axle Removal Points368
Brake Disc Removal Points368
Front Wheel Assembly And Installation370
Rear Wheel Assembly And Installation374
Front Brake Removal380
Front Brake And Rear Brake380
Freno Anteriore E Freno381
Rear Brake382
Rear Brake Removal382
Freno Posteriore383
Caliper Disassembly384
Master Cylinder Disassembly386
Brake Fluid Removal Points388
Caliper Piston Removal Points388
Piston Seal Kit Removal Points390
Master Cylinder Inspection390
Caliper Inspection392
Brake Hose Inspection392
Caliper Piston Assembly And Installation392
Front Caliper Assembly And Installation394
Rear Caliper Assembly And Installation396
Master Cylinder Kit Assembly And Installation400
Front Master Cylinder Assembly And Installation402
Rear Master Cylinder Assembly And Installation404
Front Brake Hose Assembly And Installation406
Rear Brake Hose Assembly And Installation408
Brake Fluid Assembly And Installation410
Front Fork414
Front Fork Removal414
Forcella Anteriore415
Fourche Avant415
Front Fork Disassembly416
Front Fork Handling Note418
Cap Bolt Removal Points418
Inner Tube Removal Points420
Damper Rod Removal Points420
Damper Rod Inspection420
Base Valve Inspection422
Fork Spring Inspection422
Inner Tube Inspection422
Outer Tube Inspection422
Cap Bolt Inspection424
Front Fork Assembly424
Front Fork Installation436
Handlebar440
Handlebar Removal440
Manubrio441
Throttle Disassembly442
Master Cylinder Removal Points444
Handlebar Inspection444
Throttle Assembly444
Handlebar Assembly And Installation446
Steering454
Steering Removal454
Sterzo455
Ring Nut Removal Points456
Bearing (Lower) Removal Points456
Ball Race Removal Points456
Steering Shaft Inspection456
Bearing And Ball Race Inspection458
Under Bracket Assembly And Installation458
Swingarm464
Swingarm Removal464
Forcellone Oscillante465
Frein Avant Et Frein Arriere465
Swingarm Disassembly466
Bearing Removal Points468
Swingarm Inspection468
Relay Arm Inspection468
Connecting Rod Inspection468
Bearing And Oil Seal Assembly And Installation470
Swingarm Assembly And Installation472
Rear Shock Absorber478
Rear Shock Absorber Removal478
Ammortizzatore Posteriore479
Et Couvercles Lateraux479
Rear Shock Absorber Handling Note480
Rear Shock Absorber Notes On Disposal480
Bearing Assembly And Installation484
Spring (Rear Shock Absorber) Assembly And Installation484
Rear Shock Absorber Assembly And Installation486
Electrical Components And Wiring Diagram490
Elektrische Einrichtungen491
Ignition System492
Inspection Steps492
Spark Gap Test496
Couplers And Leads Connection Inspection496
"Engine Stop" Button Inspection496
Ignition Coil Inspection498
Magneto Cdi499
Cdi Unit Inspection500
Solenoid Valve System502
Systeme D'electrovanne503
Spezialwerkzeuge504
Solenoid Valve Operation506
Solenoid Valve Coil Inspection506
Tps (Throttle Position Sensor) System508
Tps Coil Inspection512
Tps (Throttle Position Sensor)513
System513
Tps Replacement And Adjustment514
Tps Input Voltage Inspection518
Setting520
Tuning520
Carburetor Setting520
Atmospheric Conditions And Carburetor Setting520
Test Run522
Effects Of Setting Parts In Relation To Throttle Valve Opening524
Main Jet Adjustment524
Powet Jet Adjustment524
Pilot Jet Adjustment526
Jet Needle Groove Position Adjustment526
Jet Needle Adjustment(For Usa, Cdn, Za, Aus And Nz)530
Jet Needle Adjustment (For Europe)532
Relationship With Throttle Opening534
Carburetor Setting Parts536
Road Condition And Examples Of Carburetor Setting538
Examples Of Carburetor Setting Depending On Symptom538
Change Of The Heat Range Of Spark Plugs546
Selection Of The Secondary Reduction Ratio (Sprocket)548
Drive And Driven Sprockets Setting Parts550
Tire Pressure550
Front Fork Setting552
Spring Preload Adjustment554
Setting Of Spring After Replacement554
Front Fork Setting Parts558
Adjustment Washer558
Rear Suspension Setting560
Choosing Set Length560
Rear Shock Absorber Setting Parts566
Rear Shock Spring566
Extent Of Adjustment (Spring Length)566
Suspension Setting568