2004 Yamaha NXC125 Cygnus Service Manual

Your 2004 NXC125 Cygnus repair manual covers full service and diagnostics. Get your scooter back on the road with this essential guide

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Yamaha Models Covered & Key Technical Specifications

Models: Yamaha NXC125 Cygnus

Model Years: 2004

Serial Numbers: 5ML1, 5ML2

Technical Data:

  • Engine displacement: 124 cm3

  • Engine configuration: Air-cooled, 4-stroke, SOHC, forward-inclined single cylinder

  • Bore x stroke: 52.4 x 57.9 mm

  • Compression ratio: 10 ± 0.4 : 1

  • Idle speed: 1,700–1,800 r/min

  • Transmission: Automatic centrifugal clutch

  • Fuel system: CVK24 (KEIHIN) carburetor

  • Brake system: Single-disc front brake, rear drum brake

Technical Specifications
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Document Number / Seller:
24573 / Elizabeth Jackson
File Size:
10.32 MB
File Type:
ZIP
Language:
English
Printable:
Yes
Category:
Scooter
Last updated / verified
Jun 5, 2026

Yamaha Manual Features & Content Preview

2004 Yamaha NXC125 Cygnus Service Manual

Working on the 5ML-series Cygnus? This official 100-page Yamaha OEM workshop reference delivers the exact technical specifications and data you need for an accurate maintenance build.

  • Complete coverage for 2004 Yamaha NXC125 Cygnus scooters, including the 5ML1 and 5ML2 variants.
  • Official Yamaha Motor publication (First Edition, January 2004 | Part Number: 5ML1-AE1).
  • Packed with 12 torque specification tables, 3 electrical wiring schematics, and detailed periodic maintenance charts.
  • Instant access: Available as a direct digital download immediately after checkout.
  • Fully searchable and DRM-free: Quickly locate specific part numbers and print the pages you need for the bench.

Before you dive in, always ensure your scooter is safely secured on a level center stand and the engine is completely cool prior to starting any inspection.

Technical Data & System Overviews

Skip the guesswork. This factory-authorized document outlines exact service intervals, fluid capacities, and crucial part clearance limits for the engine, chassis, carburetor, and electrical systems. You will also find structured inspection routines covering the steering head, front forks, brake systems, and fuel-delivery components. The manual features detailed technical diagrams that map out disassembly sequences, lubrication points, and precise cable routing paths.

Critical Specifications Included

Get straight to the numbers that matter for your tune-up. The data sheets confirm vital assembly metrics, such as:

  • Cylinder head bolt torque: 22 Nm
  • Intake valve clearance: 0.10–0.14 mm
  • Spark plug gap: 0.6–0.7 mm (CR7E)

Please note: This document provides comprehensive reference data, technical specifications, and schematics. It does not serve as a step-by-step basic repair tutorial.

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.

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