1998 Yamaha YZ250(K)/LC Workshop & Repair Manual
This manual covers the YZ250(K)/LC, YZ250LC, and YZ250K1 models. It includes detailed procedures for maintenance, repair, and adjustments. PN 5DJ-28199-30.
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Models Covered & Key Technical Specifications
Yamaha YZ250(K)/LC, YZ250LC, YZ250K1 (1998) - Workshop & Repair Manual
This manual provides a complete guide for servicing your motorcycle.
- Designated Engine Type: Liquid-cooled 2-stroke, gasoline is the primary power source.
- Specific Displacement: 249 cm³ defines the engine's working volume.
- Nominal Compression Ratio: 8.7-10.6:1 is the standard ratio for optimal combustion.
- Design Ignition System: CDI magneto controls the ignition timing accurately.
- Engineered Fuel System: Premix (30:1) ensures proper lubrication for the engine.
- Essential Transmission Type: Constant mesh, 5-speed transmission provides versatile gear ratios.
Professional Workshop Service Manual & Technical Specifications
Structured Factory Parts Manual: Yamaha YZ250(K)/LC, YZ250LC, YZ250K1 Motorcycle Workshop & Repair Manual (1998) - Precision Diagnostics & Maintenance Factory-Standards
Product-Line: Motorcycle // Assembly-Group: Engine/Chassis // Service-Level: Factory-Standards
Sequentially establishing maintenance procedures, this document details diagnostic protocols and component specifications for the Yamaha YZ series.
| Metric | Technical-Path | Context |
|---|---|---|
| Engine Type | Liquid-cooled 2-stroke, gasoline | Primary power source specification. |
| Displacement | 249 cm³ | Engine working volume data. |
| Compression Ratio | 8.7-10.6:1 | Optimal combustion parameter. |
| Ignition System | CDI magneto | Ignition timing control mechanism. |
| Lubrication | Premix (30:1) | Engine lubrication method. |
| Transmission | Constant mesh, 5-speed | Gear ratios and operational type. |
Following OEM groupings, the manual includes detailed sections on the engine, chassis, electrical components, and tuning.
This manual meticulously documents the engine, detailing procedures for the cylinder head, piston, clutch, and transmission systems. It also provides analytical insights into chassis components, including the front and rear suspension, wheels, and brakes.
This manual documents torque specifications for critical components to ensure proper rotational loosening prevention.
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