Yamaha TZR125 & DT125R Service and Repair Manual 1987-2002 Haynes

Description

Yamaha TZR125 & DT125R Service and Repair Manual 1987-2002 Haynes

This Yamaha TZR125 & DT125R Service and Repair Manual from Haynes is the definitive workshop guide for owners and technicians working on these popular 125cc single-cylinder two-stroke models. Written by Mark Coombs with additional content by Phil Mather, this manual draws on practical workshop experience to provide comprehensive coverage of routine maintenance, fault diagnosis, and major overhaul procedures for the TZR125 (1987-1993) and DT125R (1988-2002) models. Whether you are a seasoned mechanic or a dedicated owner, this TZR125 repair manual will help you keep your machine running reliably.

The manual is based on a complete strip-down and rebuild carried out in a typical workshop setting, using standard tools wherever possible. It emphasizes safe working practices and includes detailed step-by-step instructions, clear photographs, and line drawings to guide you through every job, from basic servicing to a full engine rebuild. This Yamaha DT125R service manual is an essential tool for preserving the performance and longevity of your motorcycle.

File Details

• Manual Type: Service and Repair Manual (Haynes Service and Repair Manual Series)
• Models Covered: Yamaha TZR125 (1987-1993) and DT125R (1988-2002)
• Engines: 124cc single-cylinder, liquid-cooled two-stroke (YPVS power valve on later models)
• Publication Details: Haynes Publishing, 2002
• Language: English
• File Format: PDF

Chapters Covered

The manual is logically structured to cover every major system of the motorcycle:

• Chapter 1: Engine, Clutch and Gearbox: Complete overhaul procedures for the 124cc two-stroke engine. Covers cylinder head and barrel, piston, crankcase separation, crankshaft, gearbox, clutch and kickstart mechanism. Includes specifications and torque settings.
• Chapter 2: Cooling System: Radiator removal, water pump overhaul, thermostat testing, coolant draining and filling.
• Chapter 3: Fuel System and Lubrication: Carburettor dismantling, rebuilding and tuning (Mikuni VM26SS). Covers fuel tank, fuel tap, air cleaner, reed valve, YEIS (Yamaha Energy Induction System), oil pump removal, bleeding and adjustment, oil tank.
• Chapter 4: Ignition System: Fault diagnosis and testing of the CDI (Capacitor Discharge Ignition) system. Includes testing of source and pulser coils, ignition HT coil, and CDI unit.
• Chapter 5: Frame and Forks: Front fork overhaul (TZR and DT models), steering head bearings, swinging arm and suspension linkage removal and refitting, rear suspension unit overhaul.
• Chapter 6: Wheels, Brakes and Tyres: Wheel removal, bearing replacement, brake caliper and master cylinder overhaul, brake disc inspection, rear drum brake service (early TZR models), tyre removal and repair.
• Chapter 7: Electrical System: Battery maintenance, charging system testing, bulb replacement, alternator coil testing, regulator/rectifier testing, fuse replacement.
• Chapter 8: 1997-on DT125R Models: Supplementary chapter covering later DT125R models, including operational YPVS system, revised oil pump, generator and CDI unit.

This Haynes Yamaha TZR125 manual equips you with the knowledge to tackle everything from a simple oil change and chain adjustment to a comprehensive engine rebuild. The authors’ practical approach, combined with the manual’s extensive photographic content, demystifies complex jobs and gives you the confidence to service your own Yamaha. This DT125R repair manual PDF covers all the crucial technical data, including torque wrench settings, engine tuning specifications, and detailed wiring diagrams, ensuring you have the correct information for every task.

What This Manual Covers

• Comprehensive Engine Overhaul: Step-by-step procedures for stripping, inspecting, and rebuilding the entire engine unit, including the YPVS system on later models.
• Carburettor Tuning & Fuel System Service: Detailed instructions for setting up the Mikuni carburettor correctly, cleaning the fuel system, and bleeding the oil pump.
• Chassis & Suspension Maintenance: Full guidance on rebuilding the front forks, replacing steering head bearings, and servicing the rear suspension and swinging arm.
• Brake System Overhaul: Procedures for rebuilding disc brake calipers and master cylinders, and servicing drum brakes on earlier models.
• Electrical Fault-Finding: A systematic approach to diagnosing and repairing common electrical faults in the ignition and charging systems.

Why This Manual Matters

Owning a Yamaha TZR125 or a Yamaha DT125R is about enjoying a classic two-stroke riding experience. This Haynes manual is your key to maintaining that experience. It provides the correct procedures and specifications to ensure repairs are done right the first time, preventing costly mistakes and keeping your machine safe and reliable. With this manual, you can perform repairs and service tasks yourself, saving money on expensive dealer labour and gaining a deeper understanding of your motorcycle.

Delivery

• Instant PDF Download: No shipping costs or waiting times. Get immediate access right after purchase.
• Any Device: Read on your PC, Mac, tablet, or smartphone.
• Printable: Print the pages you need to take into the garage.