2004 Yamaha TT-R125 / TT-R125E / TT-R125LW / TT-R125LWE Owner's Service Manual

This 2004 Yamaha TT-R125 owner's service manual covers various models, including procedures for general information, specifications, regular inspection and adjustments, engine, chassis, and electrical systems. Ref: 5HP-28199-85.

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Technical Safety Notice
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This official OEM document is intended for professional technicians and skilled operators. Performing service on mechanical equipment involves inherent risks. By purchasing, you acknowledge that RepairLoader provides original manufacturer data for informational purposes. Always prioritize safety: use correct tools, wear protective gear, and consult a certified professional if you are uncertain of any procedure.

Yamaha Models Covered & Key Technical Specifications

Models: TT-R125, TT-R125E, TT-R125LW, TT-R125LWE
Sub-models / Variants: TT-R125S, TT-R125ES, TT-R125LWS, TT-R125LWES
Trade Names: TT-R125
Build Years: 2004
Serial Numbers: 5HPP, 5HPR, 5HPS, 5HPT, 5HPU, 5HPV, 5HPW, 5HPX
Technical Data:

  • Engine displacement: 124 cm3
  • Engine type: Air-cooled 4-stroke, SOHC, single cylinder
  • Transmission: 5-speed, constant mesh, left foot operation
  • Starting system: Kick (TT-R125/LW), Kick and electric starter (TT-R125E/LWE)
  • Lubrication system: Wet sump
  • Fuel tank capacity: 6.6 L (1.74 US gal)
Technical Specifications
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Document Number / Seller:
26785 / Deborah Garcia
File Size:
20.50 MB
File Type:
ZIP
Language:
English, French, German
Printable:
Yes
Category:
Bike
Last updated / verified
Oct 12, 2025

Yamaha Manual Features & Content Preview

Yamaha TT-R125 Series Maintenance and Operation

  • Built for owners and service workshops maintaining the 2004 Yamaha TT-R125, TT-R125E, TT-R125LW, and TT-R125LWE off-road machines.
  • Official Yamaha publication P/N 5HP-28199-85, 1st Edition, March 2003.
  • Contains 47 pages of technical specifications, maintenance procedures, and exploded-view mechanical illustrations.
  • Delivered as a direct download the moment payment clears.
  • Stored against your account so you can retrieve it after a hard-drive loss.
  • Indexed PDF search covers every chapter and appendix.
  • This 2003 first edition is the primary reference manual for the 2004 model year production cycle, including specific chassis and engine differences for the LW/LWE variants.

Manual Content and Coverage

This 2004 Yamaha TT-R125 service manual provides technical oversight for the TT-R125, TT-R125E, TT-R125LW, and TT-R125LWE. It organizes information into six dedicated chapters, beginning with general information such as machine identification, fuel requirements, and break-in procedures. The manual then details specifications for the engine and chassis, followed by regular inspection schedules. Later chapters cover disassembly and maintenance of the engine, chassis components, and electrical systems. The final sections include detailed wiring diagrams and troubleshooting references for system electrical parts.

Specification and Data Preview

The 2004 Yamaha TT-R125 features a 124 cm3 displacement engine with a 10.0:1 compression ratio. Cylinder head warp limit is documented at 0.03 mm in the engine specification tables. The 2004 Yamaha TT-R125 primary reduction ratio is listed at 3.579. Intake valve clearance for the TT-R125 series is specified at 0.08–0.12 mm in the engine section. The 2004 Yamaha TT-R125 chain slack is specified at 35–50 mm. Cooling and lubrication system data, torque values for threaded fasteners, and electrical resistance thresholds for CDI and charging systems are documented throughout the text. These values ensure the correct technical reference for your Yamaha bike when performing equipment maintenance.

Note: This document is for informational purposes only. Reference only — always consult a certified technician before performing service on this equipment. An official 2004 Yamaha OEM service publication covering the TT-R125, TT-R125E, TT-R125LW, and TT-R125LWE, providing comprehensive engine, chassis, and electrical specifications for the 5HP-series build.

Manual FAQ, Purchase & Download Details

What content is included in the chapters for engine and chassis systems? keyboard_arrow_down

Manual includes exploded diagrams at the start of disassembly sections to clarify parts and layout. These chapters also contain specification tables and reference notes for engine and chassis components.

Is the document provided as a digital PDF file? keyboard_arrow_down

Product is provided as a downloadable PDF document.

Are there technical references for electrical systems and tightening specifications included in the manual? keyboard_arrow_down

Document contains electrical specification tables that reference resistance, voltage, and current values. It also includes sections that list tightening specifications and other technical data for the covered models.

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