2005 Yamaha DT125RE / DT125X Motorcycle Service Manual

Get your Yamaha DT125RE and DT125X running like new. This manual covers diagnostics, repairs, and maintenance for your 2-stroke motorcycle. Includes engine, chassis, and electrical systems. Part # 1D01-AE1.

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Document Details

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Document Number / Seller:
23444 / Michael Wright
File Size:
8.42 MB
File Type:
PDF
Language:
English
Pages:
319
Printable:
Yes
Category:
Motorbike
Last updated / verified
Dec 25, 2025

Models Covered & Key Technical Specifications

2005 Yamaha DT125RE / DT125X Motorcycle Service Manual

For Yamaha DT125RE & DT125X: Diagnostics, removal sequences, and maintenance for engine, chassis, electrical system, and more. Includes diagrams and specifications. Yamaha Bundle.

  • Design Specifications: Maximum power output is rated at 11 kW (8000 rpm) for the DT125RE model Architecture.
  • Nominal Displacement Data: 124 cm3 displacement establishes the engine capacity Framework.
  • Calibrated Securement Values: The spark plug specification determines BR8ES (NGK) type fastening requirement Threshold.
  • Documented Power Rating: The ignition system is designed for CDI with 17° B.T.D.C. digital advance Configuration.
  • Essential Lubrication Requirements: Transmission oil is specified as Type SE motor oil Standards.
  • System Fill Performance: Radiator capacity corresponds to 0.92 L total coolant volume system Protocol.

Professional Workshop Service Manual & Technical Specifications

Practical Performance Hydraulic Manual: Yamaha DT125RE / DT125X Motorcycle Service Manual Documentation-Framework

Technical-Scope: Service Manual // Application-Range: Motorcycle / Engine Logic // System-Identifier: Yamaha DT125RE/DT125X

Maintenance hierarchies are structured into:

  • Engine
  • Chassis
  • Electrical System
  • Troubleshooting

The manual details maintenance guidelines for engine, transmission, and electrical systems. OEM guidelines are included for chassis components, ensuring proper alignment and function. Transmission service information covers gear ratios and clutch operation. HVAC system procedures are not applicable to this model. Torque specifications are documented for critical engine and chassis fasteners, aiding in corrosion joint prevention. The document provides information on troubleshooting common issues, offering diagnostic insights and component replacement procedures. This is an integrated mechanism for understanding your motorcycle's operation.

Metric Baseline Calibration-Data
Engine Removal Side Covers Coolant
Transmission Oil Exhaust Pipe Carburetor
Autolube Pump Cable and Hose Clutch Cable Y.P.V.S. Cables
Radiator Hose Leads Drive Chain

FAQ

What are the **proper** clearance measurements for the Yamaha DT125RE/DT125X? keyboard_arrow_down

0.02-0.060 mm for the top ring and 0.035-0.070 mm for the 2nd ring are the specified side clearances.

Specify the **standard** torque specifications for the DT125RE/DT125X engine. keyboard_arrow_down

20 Nm is specified for the spark plug, and 22 Nm is required for the cylinder head nuts.

What is the **necessary** safety precaution when working with the battery? keyboard_arrow_down

Wear protective eye gear when handling or working near batteries to prevent severe burns or permanent eye injury from electrolyte.

Calculate the **recommended** lubrication requirements for the transmission. keyboard_arrow_down

Type SE motor oil is recommended for the transmission, with a periodic oil change quantity of 0.75L.

What values are **calibrated** for the drive chain slack? keyboard_arrow_down

40-55mm for the DT125RE and 25-40mm for the DT125X are the calibrated drive chain slack ranges.

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Reviews (3)

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New
Excellent manual with detailed troubleshooting sections. The email with the download link arrived promptly. Can't imagine working on my bike without it!
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New
This manual has everything you need to maintain and repair your bike. The instructions are clear and easy to follow. Highly recommend!
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New
The download process was smooth, and the support team responded quickly to my questions. The manual is thorough and very helpful!