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Yamaha DT125X 2005 - User Manual

Yamaha DT125X 2005
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SERVICE MANUAL
DT125RE
1D01-AE1
DT125X
2005

Table of Contents

Questions and Answers

  • C
    Christine ObrienSep 15, 2025
    What to do if Yamaha DT125X 2005 Motorcycle gear shifting is faulty: Improperly returned stopper lever?
    • R
      Robert NashSep 15, 2025
      If you are experiencing faulty gear shifting with your Yamaha Motorcycle, one potential solution is to check for Improperly returned stopper lever.
  • L
    Luke MeadowsAug 25, 2025
    What to do if Yamaha DT125X 2005 gear shifting is faulty?
    • T
      Troy WhiteAug 25, 2025
      If you are experiencing faulty gear shifting with your Yamaha Motorcycle, one potential solution is to check the push lever position, as it may be improperly adjusted. Also check for seized shift fork or bent shift forks guide bar.
  • D
    Donna FreemanAug 25, 2025
    What to do if my Yamaha DT125X 2005 is hard to start: clogged fuel tank cap?
    • A
      Amanda HayesAug 26, 2025
      If your Yamaha Motorcycle is experiencing starting failure or hard starting, a potential cause could be a clogged fuel tank cap. Consider checking and cleaning it.
  • C
    Christian CollinsAug 26, 2025
    How to fix a Yamaha Motorcycle with starting failure due to deteriorated fuel?
    • B
      Brett ClayAug 27, 2025
      If your Yamaha Motorcycle is experiencing starting failure or hard starting, one potential reason could be deteriorated fuel or fuel that contains water or foreign material. Make sure that you are using a good quality fuel.
  • C
    Carrie RamosSep 16, 2025
    What to do if Yamaha DT125X 2005 Motorcycle gear shifting is faulty: Worn shift cam groove?
    • T
      tiffanymartinSep 17, 2025
      If you are experiencing faulty gear shifting with your Yamaha Motorcycle, one potential solution is to check for Worn shift cam groove.
  • M
    michael67Sep 23, 2025
    What to do if Yamaha DT125X 2005 gear shifting is faulty: Improper quality (Low viscosity)?
    • J
      Julie Munoz DDSSep 23, 2025
      If you are experiencing faulty gear shifting with your Yamaha Motorcycle, one potential solution is to check for Improper quality (Low viscosity).
  • M
    Mary NielsenSep 8, 2025
    What to do if Yamaha Motorcycle gear shifting is faulty: Deterioration?
    • J
      James ReyesSep 8, 2025
      If you are experiencing faulty gear shifting with your Yamaha Motorcycle, one potential solution is to check for Deterioration.
  • J
    Joshua LoveSep 9, 2025
    What to do if Yamaha DT125X 2005 Motorcycle is hard to start: Clogged starter jet?
    • E
      Erik StephensonSep 9, 2025
      If your Yamaha Motorcycle is experiencing starting failure or hard starting, a potential cause could be a clogged starter jet. Consider checking and cleaning the starter jet.
  • G
    Garrett LawrenceSep 2, 2025
    What to do if Yamaha Motorcycle gear shifting is faulty: Swollen friction plate?
    • A
      Amanda SalasSep 2, 2025
      If you are experiencing faulty gear shifting with your Yamaha Motorcycle, one potential solution is to check for swollen friction plate.
  • M
    Matthew CastilloAug 31, 2025
    What to do if Yamaha DT125X 2005 gear shifting is faulty: Warped clutch plate?
    • W
      wadezacharyAug 31, 2025
      If you are experiencing faulty gear shifting with your Yamaha Motorcycle, one potential solution is to check for warped clutch plate.

Summary

PERIODIC CHECKS AND ADJUSTMENTS

CHASSIS

FRONT AND REAR BRAKE

Instructions for inspecting, replacing, and assembling front and rear brake components.

FRONT FORK

Procedures for front fork removal, disassembly, inspection, and assembly.

ENGINE

ENGINE REMOVAL

Steps for removing the engine and its related components from the motorcycle.

ENGINE DISASSEMBLY

Detailed procedures for disassembling engine components like the cylinder and clutch.

INSPECTION AND REPAIR

Guides on inspecting and repairing engine parts such as pistons, rings, and crankshafts.

ENGINE ASSEMBLY AND ADJUSTMENTS

Instructions for reassembling engine components and performing necessary adjustments.

ELECTRICAL SYSTEM

IGNITION SYSTEM

Covers the circuit diagram and troubleshooting for the ignition system.

CHARGING SYSTEM

Details the circuit diagram and troubleshooting for the charging system.

LIGHTING SYSTEM

Includes the circuit diagram and troubleshooting for the motorcycle's lighting system.

SIGNALING SYSTEM

Covers the circuit diagram and troubleshooting for the signaling system (lights, horn, etc.).

TROUBLESHOOTING

STARTING FAILURE; HARD STARTING

Guides through diagnosing and resolving issues related to starting the engine or hard starting.

FAULTY BRAKE

Diagnosing problems with braking effectiveness.

FAULTY SIGNAL AND LIGHTING SYSTEM

Guides through diagnosing and fixing issues with the motorcycle's lights and signals.

Yamaha DT125X 2005 Specifications

General IconGeneral
Engine typeSingle cylinder, 2-stroke
Displacement124 cc
Cooling systemLiquid-cooled
Fuel systemCarburetor
IgnitionCDI
Transmission6-speed
Front suspensionTelescopic fork
Rear suspensionSwingarm
Front brakesSingle disc
Rear brakesSingle disc
Front tire110/70-17
Dry weight119 kg
Front brakeSingle disc
Rear brakeSingle disc
Overall length2, 075 mm
Overall height1, 165 mm
Seat height880 mm
Final DriveChain
Bore x Stroke56.0 mm x 50.7 mm
Fuel capacity10.8 liters
Clutch typeWet, multi-plate
Fuel tank capacity10 liters
Lubrication systemAutolube

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