Official Yamaha DT125RE & DT125X Motorcycle Service Manual - Factory Diagnostics & Repair Procedures (2005)
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Sample pages from the Official Yamaha DT125RE & DT125X Motorcycle Service Manual - Factory Diagnostics & Repair Procedures (2005) manual
Purchase Information
2005 Yamaha DT125RE & DT125X Motorcycle Service Manual - Technical Specifications
- Document Number / Seller:
- 23444 / Michael Wright
- File Size:
- 8.42 MB
- File Type:
- Language:
- English (some of our manuals are multilanguage)
- Pages:
- 319
- Printable:
- Yes
- Estimated Download Time:
- 0.17 Minutes
- Delivery Format:
- Digital (PDF) - Instant Access
- Category:
- Motorcycle
- Brand:
- Yamaha
- Reviewed and Approved:
- Dec 25, 2025
Yamaha Models and Parts Covered in this Motorcycle Manual
- DT125RE (2005)
- DT125X (2005)
- DT125RE 2C81 (2005)
- DT125X 1D01/1D02 (2005)
Complete Manual Information
Yamaha DT125RE & DT125X Factory Service Manual (2005)
Master the maintenance and repair of your 2005 Yamaha DT125 series with this professional-grade factory service manual. Whether you are tearing up the streets on the DT125X or tackling trails on the DT125RE, this comprehensive guide provides the exact technical data and step-by-step procedures used by certified Yamaha mechanics.
This manual covers the liquid-cooled, 2-stroke legendary powerhouses, including the model codes 2C81 for the DT125RE and 1D01/1D02 for the DT125X. It is an indispensable resource for anyone looking to maintain the peak performance and safety of these iconic motorcycles.
Comprehensive Model Coverage
- DT125RE (2005) - Model Code 2C81
- DT125X (2005) - Model Codes 1D01, 1D02
Technical Specifications & Identification
Ensure you are working on the right machine by locating your serial numbers as guided in this manual:
- Frame Serial Number: Stamped on the steering head pipe.
- Engine Serial Number: Stamped on the left side of the crankcase (The first three digits identify the model).
Quick Specs at a Glance:
- Engine: 124cc, 2-stroke, liquid-cooled single cylinder.
- Power: 11kW at 8000 rpm / Torque: 13Nm at 8000 rpm.
- Transmission: 6-speed constant mesh with helical primary reduction gears.
- Fuel System: Mikuni TM28-92/1 carburetor with Y.E.I.S. chamber.
Expert Repair & Maintenance Data
This manual is structured into logical chapters to help you find information quickly:
- General Information: Preparation for removal, special tool lists (like the Flywheel Puller 90890-01362), and torque conversion tables.
- Periodic Maintenance: Detailed schedules for spark plug inspection (NGK BR8ES), air filter cleaning, and transmission oil changes (SAE 10W30 Type SE).
- Engine Overhaul: Full instructions for the Y.P.V.S. (Yamaha Power Valve System) adjustment, cylinder head warpage limits (0.03mm), and piston-to-cylinder clearance (0.045–0.050mm).
- Chassis & Suspension: Service data for the telescopic front forks and Monocross rear suspension, including spring free length and oil capacity (0.495L for DT125RE / 0.6L for DT125X).
- Electrical System: Complete wiring diagrams, CDI unit troubleshooting, and battery maintenance (GT6B-3 12V 6Ah).
Why This Manual is Essential
Stop guessing and start fixing with precision. This manual provides:
- Exploded Diagrams: Visual aids at the start of every removal section to identify every bolt and washer.
- Precise Torque Specs: Avoid stripped threads and loose components with exact Nm and m-kg values for every critical fastener.
- Troubleshooting Guides: Dedicated sections to diagnose starting failures, poor idling, or electrical malfunctions.
- Yamaha Autolube System: Vital steps for air bleeding and stroke adjustment of the oil pump to prevent engine seizure.
Designed for readability on all devices, this manual allows you to bring factory-level expertise directly to your garage. Keep your Yamaha DT125 running like new with the only guide that truly understands its 2-stroke soul.
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Frequently Asked Questions - Yamaha Motorcycle Manual
What does this Yamaha manual cover?
This comprehensive service manual covers detailed repair procedures, maintenance schedules, troubleshooting guides, and technical specifications for Official Yamaha DT125RE & DT125X Motorcycle Service Manual - Factory Diagnostics & Repair Procedures (2005). It includes information for the following models: - DT125RE (2005) - DT125X (2005) - DT125RE 2C81 (2005) - DT125X 1D01/1D02 (2005).
Is this manual suitable for beginners?
Yes, this Yamaha manual is designed for both professional technicians and DIY enthusiasts. It includes step-by-step procedures with clear illustrations and safety guidelines for Motorcycle maintenance and repair.
What file format will I receive?
You will receive this manual as a PDF file (8.42 MB), which is compatible with all devices. The manual is fully searchable and printable for your convenience.
How quickly can I access the manual after purchase?
You'll receive instant access to your Yamaha Motorcycle manual immediately after payment completion. The download link is valid for 3 days, with lifetime re-download guarantee.
Are engine specifications included?
This motorcycle service manual includes detailed engine specifications, valve clearances, torque settings, and performance data specific to your Yamaha model.
Can I print specific sections of the manual?
Absolutely! This digital manual allows you to print any section you need, from individual pages to complete chapters, making it perfect for workshop use.
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