Yamaha VINO 125 Service Manual Page 291
- Page / 294
- Table of contents
- TROUBLESHOOTING
- BOOKMARKS
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8-4
TRBL
SHTG
OVERHEATING/POOR BRAKING PERFORMANCE/
FAULTY FRONT FORK LEGS
POOR SPEED PERFORMANCE
V-belt
8Oil or grease on the V-belt
Primary pulley weight(s)
8Faulty operation
8Worn primary pulley weight
Primary fixed sheave
8Worn primary fixed sheave
Primary sliding sheave
8Worn primary sliding sheave
Secondary fixed sheave
8Worn secondary fixed sheave
Secondary sliding sheave
8Worn secondary sliding sheave
EAS00854
OVERHEATING
ENGINE
Cylinder head and piston
8Heavy carbon buildup
Engine oil
8Incorrect oil level
8Incorrect oil viscosity
8Inferior oil quality
FUEL SYSTEM
Carburetor
8Incorrect main jet setting
8Incorrect fuel level
8Damaged or loose carburetor joint
Air filter
8Clogged air filter element
CHASSIS
Brakes
8Dragging brake
ELECTRICAL SYSTEMS
Spark plug
8Incorrect spark plug gap
8Incorrect spark plug heat range
Ignition system
8Faulty C.D.I. unit
EAS00859
POOR BRAKING PERFORMANCE
Disc brake
8Worn brake pad
8Worn brake disc
8Air in hydraulic brake system
8Leaking brake fluid
8Faulty brake caliper kit
8Faulty brake caliper seal
8Loose union bolt
8Damaged brake hose
8Oil or grease on the brake disc
8Oil or grease on the brake pad
8Incorrect brake fluid level
Drum brake
8Worn brake shoe
8Worn or rusty brake drum
8Incorrect brake camshaft lever position
8Incorrect brake shoe position
8Damaged or fatigued brake shoe spring
8Oil or grease on the brake shoe
8Oil or grease on the brake drum
8Broken brake torque rod
EAS00860
FAULTY FRONT FORK LEGS
LEAKING OIL
8Bent, damaged or rusty inner tube
8Cracked or damaged outer tube
8Improperly installed oil seal
8Damaged oil seal lip
8Incorrect oil level (high)
8Loose damper rod assembly bolt
8Damaged damper rod assembly bolt cop-
per washer
8Cracked or damaged cap bolt O-ring
MALFUNCTION
8Bent or damaged inner tube
8Bent or damaged outer tube
8Damaged fork spring
8Bent or damaged damper rod
8Incorrect oil viscosity
8Incorrect oil level
- SERVICE MANUAL 1
- EAS00000 2
- IMPORTANT MANUAL INFORMATION 3
- HOW TO USE THIS MANUAL 4
- EAS00008 5
- TABLE OF CONTENTS 6
- GENERAL INFORMATION 8
- IMPORTANT INFORMATION 10
- CHECKING THE CONNECTIONS 11
- SPECIAL TOOLS 12
- SPECIFICATIONS 16
- SAE 10W-30 17
- SAE 10W-40 17
- SAE 20W-40 17
- SAE 20W-50 17
- ENGINE SPECIFICATIONS 18
- CHASSIS SPECIFICATIONS 26
- ELECTRICAL SPECIFICATIONS 29
- TORQUE SPECIFICATIONS 33
- TIGHTENING TORQUES 34
- BEL-RAY asembly lube 38
- OIL FLOW DIAGRAMS 40
- CABLE ROUTING 42
- INTRODUCTION 49
- EMISSION CONTROL SYSTEM 50
- EAU32121 51
- EAU17620 51
- COVER AND PANEL 52
- ADJUSTING THE VALVE CLEARANCE 55
- EAS00054 58
- EAS00057 61
- CHECKING THE SPARK PLUG 63
- CHECKING THE IGNITION TIMING 64
- EAS00067 65
- CHECKING THE ENGINE OIL LEVEL 68
- CHECKING THE ENGINE OIL 69
- CHANGING THE TRANSMISSION OIL 72
- EAS00077 73
- EAS00086 74
- EAS00091 74
- CHECKING THE CARBURETOR JOINT 76
- AND INTAKE MANIFOLD 76
- EAS00096 77
- EAS00098 77
- CHECKING THE EXHAUST SYSTEM 78
- ADJUSTING THE FRONT BRAKE/ 79
- ADJUSTING THE REAR BRAKE 79
- EAS00116 80
- CHECKING THE FRONT BRAKE HOSE 81
- BRAKE FLUID CHANGE 82
- EAS00133 84
- EAS00148 86
- CHECKING THE FRONT FORK 88
- EAS00163 89
- CHECKING THE TIRES 90
- CHECKING THE WHEELS/ 92
- LUBRICATING THE SIDESTAND/ 93
- LUBRICATING THE CENTERSTAND 93
- ELECTRICAL SYSTEM 94
- Open-circuit voltage (V) 96
- Voltmeter 99
- CHECKING THE FUSES 100
- REPLACING THE HEADLIGHT BULB 102
- ADJUSTING THE HEADLIGHT BEAMS 103
- FRONT WHEEL AND BRAKE DISC 106
- FRONT WHEEL 107
- REAR WHEEL AND REAR BRAKE 116
- FRONT BRAKE 120
- FRONT FORK 138
- HANDLEBAR 148
- STEERING HEAD 152
- REAR SHOCK ABSORBER 158
- EAS00188 162
- RemarksOrder Job/Part Q’ty 163
- EAS00192 164
- • kg, 5.1 ft • lb) 165
- • kg, 22.4 ft • lb) 165
- • kg, 7.2 ft • lb) 165
- CYLINDER HEAD 166
- THE ROCKER ARMS AND CAMSHAFT 174
- VALVES AND VALVE SPRINGS 180
- Valve stem diameter b 182
- CYLINDER AND PISTON 189
- Piston size “P” 191
- Piston pin bore diameter b 193
- Piston pin outside diameter a 193
- BELT DRIVE 196
- C.D.I. MAGNETO 211
- OIL PUMP 214
- TRANSMISSION 217
- CRANKCASE AND CRANKSHAFT 219
- CARBURETOR 227
- Starter plunger opens 234
- Perform step (3) 234
- Starter plunger closes 234
- Replace the autochoke unit 234
- AIR INDUCTION SYSTEM 236
- ELECTRICAL 239
- WIRING DIAGRAM 240
- CHECKING SWITCH CONTINUITY 242
- CHECKING THE SWITCHES 243
- CHECKING THE BULBS AND BULB 244
- IGNITION SYSTEM 247
- ELECTRIC STARTING SYSTEM 252
- CHARGING SYSTEM 262
- LIGHTING SYSTEM 265
- SIGNALING SYSTEM 271
- CARBURETOR HEATING SYSTEM 279
- CRABURETOR HEATING SYSTEM 279
- AUTO CHOKE SYSTEM 283
- TROUBLESHOOTING 288
- STARTING FAILURES/ 289
- INCORRECT ENGINE IDLING SPEED 289
- INCORRECT ENGINE IDLING 289
- FAULTY CLUTCH 290
- POOR MEDIUM-AND-HIGH-SPEED 290
- PERFORMANCE 290
- OVERHEATING 291
- POOR BRAKING PERFORMANCE 291
- FAULTY FRONT FORK LEGS 291
- UNSTABLE HANDLING/ 292
- UNSTABLE HANDLING 292
- FAULTY LIGHTING OR SIGNALING 292
- YAMAHA MOTOR TAIWAN CO., LTD 294
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