1987-2002 Yamaha TZR125 & DT125R Service and Repair Manual

Inside the Yamaha TZR125 & DT125R Service and Repair Manual

• Covers 1987–2002 Yamaha TZR125 and DT125R motorcycles, including all 124cc displacement variants and sub-model codes from 2RK through 3MD
• Official Haynes publication P/N 1655, 2002 edition covering engine, chassis, and electrical systems
• Contains 47 descriptive engine and gearbox teardown sequences and 10 detailed electrical wiring schematics
• Delivered as a direct download the moment payment clears
• Indexed PDF search covers every chapter and appendix
• Detailed coverage of the Yamaha Energy Induction System (YEIS) and YPVS power valve components unique to these 2-stroke platforms

Manual Organization and Scope

This 162-page factory-style publication provides a structured look at routine maintenance and major mechanical overhauls for the water-cooled 124cc single-cylinder series. The text is segmented into primary chapters addressing the complete engine and transmission unit, cooling system architecture, fuel and lubrication paths, ignition circuitry, and frame/suspension geometry. Specialized sections detail the unique specifications for both TZR street and DT enduro configurations, ensuring precise data alignment for different trim levels.

Technical Preview and Specifications

This document offers clear insight into the internal requirements for machine service, covering everything from piston clearance limits to transmission oil capacities. The engine specifications detail bore and stroke dimensions for both early 3DB1 and later 3RN1 engines. Torque values for critical fasteners are documented throughout the manual for the cylinder head, clutch center, and swinging arm pivot. Refer to how factory workshop documentation is structured for a breakdown of these procedures. Coolant system capacity for TZR models is specified at 1.0 liters, while DT models are listed at 0.92 liters. Spark plug electrode gaps for the 124cc powerplant are confirmed at 0.7–0.8 mm. This Haynes reference manual is intended for owners and technicians servicing the 1987–2002 Yamaha TZR125 & DT125R series, providing essential engine, chassis, and electrical specifications for the entire production range.