2001-2002 Yamaha YZ250(P)/LC, YZ250, YZ250P1 & YZ250LC Service Manual

2001–2002 Yamaha YZ250 Technical Documentation

• Covers 2001–2002 Yamaha YZ250(P), YZ250P1, and YZ250LC motocross models, including liquid-cooled and regional variants
• Official Yamaha publication (P/N 5NX-28199-30, first edition June 2001) packing 584 pages of factory reference data
• Features fully searchable OCR text and printable sections for grease-free shop floor use
• Instant digital download provides immediate access to 17 maintenance sections and 4 precise torque-check charts

Manual Content and Structure

Getting the right specs fast is crucial when you have a torn-down YZ250 taking up bench space. Available as an instant download, this service manual delivers the exact factory-recommended inspection protocols and wear limits used by Yamaha technicians. It breaks down the 5NX-series build across seven distinct chapters. You get comprehensive data on engine disassembly, top-end inspections, transmission overhauls, and the precise tuning of the YPVS governor system. Chassis service is covered in equal depth, mapping out everything from steering and suspension valving to complete electrical system routing. To keep your workspace safe, always verify the bike is securely lifted on a stand and the cooling system is fully depressurized before digging into the engine cases.

Specification Highlights

Precision matters on high-revving competition two-strokes. This guide drops the guesswork by listing the exact torque settings for critical, high-stress assemblies like the primary drive gear, cylinder head studs, and steering ring nut. You will find all essential fluid parameters, including the 1.20 L coolant capacity and specific transmission oil requirements. Need quick carburetor data? The manual specs a #178 main jet for the PWK38S carb in most regions, alongside a 0.42 mm reed valve clearance and a 0.5–0.6 mm spark plug gap. Whether you are dialing in the jetting or completely rebuilding the bottom end, these are the exact numbers required to properly maintain the machine.