2002 Yamaha TT-R125(P) / TT-R125LW(P) Factory Service & Repair Manual • P/N 5HP-28199-83

2002 Yamaha TT-R125 and TT-R125LW Factory Service Manual

• Covers the 2002 Yamaha TT-R125 and TT-R125LW, including TT-R125P and TT-R125LWP trim variations
• Official Yamaha OEM publication (P/N 5HP-28199-83) spanning 506 pages of technical data
• Delivered as an instant download directly to your device for immediate shop access
• Contains comprehensive exploded-view diagrams, torque-check point maps, and critical baseline data for professional repair work
• Searchable OCR text layer lets you jump straight to specific mechanical tolerances

Mechanical Overhaul and Maintenance Guidelines

This factory publication provides the technical foundation for servicing the Yamaha TT-R125 platforms. The document outlines exact inspection and adjustment parameters for the engine, chassis, and electrical systems. Mechanics will find complete outlines covering cylinder head and piston maintenance, transmission adjustments, and carburetor tuning. Precise cable routing diagrams support various sub-models to ensure accurate component reassembly. Standard workshop safety protocols apply when handling motorized vehicles; a well-ventilated environment and appropriate protective gear remain essential throughout any mechanical intervention. Furthermore, this manual serves purely as a descriptive reference, detailing the complex repair processes necessary to maintain these off-road motorcycles without providing direct tutorials.

Key Technical Specifications

The engine maintenance charts list the engine compression ratio at 10.0:1. Technicians will also find the maximum cylinder head warp limit of 0.03 mm alongside the intake valve cold lash setting of 0.08–0.12 mm directly within the specification tables. For fluid capacities, the document specifies a 6.6 L fuel tank capacity, which includes a 1.9 L reserve allocation. All mechanical tolerances and intervals reflect Yamaha's original factory benchmarks.