2002 Yamaha YZ125P Owner's Service Manual

Wiring diagrams, specifications, and repair sequences for the YZ125P. Covers fuser assembly, paper path, and imaging procedures plus diagnostic flowcharts. Ref: YU-1135-A

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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: YZ125P (USA), YZ125LC (EUROPE), YZ125(P) (CDN, AUS, NZ, ZA)
Sub-models / Variants: 5NY1 (USA, CDN, ZA), 5NY2 (EUROPE), 5NY4 (AUS, NZ)
Build Years: 2002
Technical Data:

  • Engine displacement: 124 cm3
  • Cylinder bore size: 54.000–54.014 mm
  • Spark plug gap: 0.5–0.6 mm
  • Standard spark plug tightening torque: 20 Nm (2.0 m•kg, 14 ft•lb)
  • Fuel tank capacity: 8.0 L (1.76 Imp gal, 2.11 US gal)
  • Minimum machine weight (without fuel): 88 kg (194 lb)
Technical Specifications
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Document Number / Seller:
29610 / Carol Lee
File Size:
8.76 MB
File Type:
PDF
Language:
English
Pages:
255
Printable:
Yes
Category:
Bike
Last updated / verified
Apr 20, 2026

Yamaha Manual Features & Content Preview

2002 Yamaha YZ125P Owner's Service Manual Overview

  • Covers 2002 Yamaha YZ125P, YZ125LC, and YZ125(P) motocross competition motorcycles across all primary market variants including USA, Europe, CDN, AUS, NZ, and ZA
  • Official Yamaha publication, 2002 edition
  • Contains dozens of technical specification tables, exploded-view diagrams, torque settings, cable routing diagrams, and maintenance schedules
  • Delivered as a direct download the moment payment clears
  • Indexed PDF search covers every chapter and appendix
  • Re-download the file any time, no expiration
  • This 2002 factory owner's service manual is the definitive guide for maintaining the YZ125P model, documenting engine, chassis, and electrical system specifications for the 5NY-series build

What the Manual Documents:

This 2002 Yamaha YZ125P owner's service manual provides necessary technical information for the maintenance and inspection of the Yamaha YZ125P series. The document content is structured in seven major segments: general information, technical specifications, regular inspection and adjustment procedures, engine overhaul, chassis maintenance, electrical system diagrams, and performance tuning configurations.

The initial chapters detail general vehicle identification, machine weight requirements, and safety warnings for competition-ready motocross units. Following this, the document transitions to routine maintenance, providing intervals for engine components, cooling systems, brake hydraulics, and suspension geometry adjustments. It documents the systematic approach to cleaning and storage for the 2002 Yamaha YZ125P to protect the integrity of its race-tuned components.

Specification Highlights:

The 2002 Yamaha YZ125P engine data includes a standard cylinder bore of 54.000–54.014 mm and a spark plug gap of 0.5–0.6 mm. Cylinder head nut torque is specified at 28 Nm (2.8 m•kg, 20 ft•lb) in the maintenance specification tables. The manual contains complete fluid capacity data, listing the transmission oil change volume at 0.65 liters and the total coolant capacity at 0.95 liters. Detailed torque-check points cover critical fasteners, including the 125 Nm (12.5 m•kg, 90 ft•lb) requirement for the front axle nut.

Reference what an OEM service publication covers for structured technical insights. Always consult a certified technician before performing service on this competition motocross motorcycle.

An official 255-page Yamaha OEM owner's service manual covering the 2002 YZ125P, documenting engine, chassis, electrical, and cooling system maintenance specifications for the globally distributed 5NY-series competition motorcycle.

Manual FAQ, Purchase & Download Details

Which chapters represent the primary content structure of the 2002 Yamaha YZ125P manual? keyboard_arrow_down

Manual is organized into seven distinct chapters covering general information, specifications, regular inspection and adjustments, engine, chassis, electrical, and tuning.

Are there exploded diagrams and job instruction charts included for the clutch and primary driven gear components? keyboard_arrow_down

Manual includes detailed exploded diagrams at the start of disassembly sections to help identify parts. These diagrams are accompanied by job instruction charts that detail the sequence of parts and assembly notes.

Is the engine section of this service manual detailed enough to provide technical data for internal components? keyboard_arrow_down

Engine chapter covers a wide range of components including the cylinder head, piston, carburetor, clutch, transmission, and crankshaft, providing technical reference points within its specific pages.

What information can be found regarding the electrical system and wiring diagrams in this document? keyboard_arrow_down

Chapter 6 contains references for electrical components and wiring diagrams for the machine. This section also covers the ignition system and associated components.

Does this manual contain tables that list technical service data such as weights or component limits? keyboard_arrow_down

Manual includes specification tables that contain data such as minimum machine weights and other maintenance parameters. These tables serve as a reference for the technical specifications of the 2002 YZ125P model. Additional service limits and standard measurements are also found within the relevant component chapters.

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