2003-2004 Yamaha YZ250(R)/LC Service Manual
Documents YZ250(R)/LC service procedures with detailed diagrams and part numbers for accurate repairs. PN 5UP-28199-30.
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Models Covered & Key Technical Specifications
2003-2004 Yamaha YZ250(R)/LC Service Manual
This manual details service procedures for the 2003-2004 Yamaha YZ250(R)/LC. Yamaha YZ250(R)/LC (2002-2003) / Yamaha Motor Corporation, Ltd | YZ series Library
- Designated Lubrication: Proper lubrication is essential for maintaining optimal engine performance, specifying the use of Yamalube "2-R" at a 30:1 ratio for all models.
- Primary Fit Tolerances: The engine features a liquid-cooled 2-stroke, gasoline configuration with a single cylinder, forward-inclined cylinder arrangement.
- Consumption Data: The motor's displacement is 249 cm3 (8.76 lmp oz, 8.42 US oz) with a bore x stroke of 66.4 x 72 mm (2.614 x 2.835 in).
- Thermal Limits: Compression ratios range from 9.1~10.9:1 (USA, CDN, ZA) and 9.0~10.6:1 (EUROPE, AUS, NZ) for optimal operation.
- Linear Velocity: The transmission is a constant mesh, 5-speed type with left foot operation, ensuring efficient gear changes.
- Scan Resolution: The ignition system is CDI magneto, ensuring reliable spark generation for optimal performance.
Professional Workshop Service Manual & Technical Specifications
Applied Safety Manual: Bike Service Manual for the 2003–2004 Yamaha YZ250(R)/LC Service-Portfolio
Engineering-Base: 2003-2004 Coverage // Year-Coverage: USA, CDN, AUS, NZ, EUROPE, ZA // Serial-Range: 5UP1, 5UP2, 5UP4 Logic
| Metric | Baseline | Calibration-Standards |
|---|---|---|
| Model Name | YZ250LC (EUROPE) / YZ250R (USA) / YZ250(R) (CDN, AUS, NZ, ZA) | - |
| Engine Type | Liquid cooled 2-stroke, gasoline | - |
| Transmission Type | Constant mesh, 5-speed | - |
| Front Suspension | Telescopic fork | - |
| Ignition System | CDI magneto | - |
Technical content addresses procedures, specifications, systems, and maintenance tables for the Yamaha YZ250(R)/LC. This manual provides a detailed overview of the machine's components and systems, including engine, chassis, and electrical systems. Careful attention is paid to ensuring proper interface and function of all parts.
Engine Procedures
This section details engine removal, crankcase assembly, and crankshaft specifications, ensuring all mechanical procedures are documented for clarity.
Chassis Specifications
Comprehensive specifications for the chassis are provided, including details on suspension, steering, and wheel systems, to ensure proper assembly and function.
Electrical Systems
Documentation covers the ignition system, CDI components, and wiring diagrams, providing necessary technical details for electrical system maintenance.
This manual documents torque specifications for various components to ensure proper gasket seal integrity and safe assembly practices.
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