2003-2008 Yamaha YZ450F Parts Catalog (P/N LIT-11626-16-38)
Yamaha Models Covered & Key Technical Specifications
Models: Yamaha YZ450F, Yamaha YZ450FR
Sub-models / Variants: 5TA1 (USA), 5TA2 (EUROPE), 5TA4 (CDN, AUS, NZ, ZA)
Trade Names: YZ450F, YZ450FR
Model Years: 2003–2008
Serial Numbers: JYA CJ03CX3A000050 and following (5TA1 model code)
Technical Data:
- Engine: Liquid-cooled 4-stroke, DOHC, single cylinder, forward inclined
- Displacement: 449 cc
- Compression Ratio: 12.5:1
- Transmission: 4-speed, constant mesh
- Lubrication: Dry sump
- Starting: Kick starter
Yamaha Manual Features & Content Preview
- Fits 2003–2008 Yamaha YZ450F and YZ450FR dirt bikes (including 5TA1, 5TA2, and 5TA4 variants)
- Official Yamaha publication (P/N LIT-11626-16-38, First Edition: June 2002)
- Contains 47 detailed exploded-view diagrams mapping out engine, chassis, and electrical sub-assemblies
- Instant digital access with a fully indexed, searchable layout—find specific part numbers in seconds
- Features the base reference data used for the 2003 YZ450FR launch, detailing the original factory hardware
Component & Assembly Details
This 300-page OEM parts catalog breaks down every component of the 2003–2008 Yamaha YZ450F. Rather than providing step-by-step repair instructions, it focuses exclusively on exact hardware identification. Chapters are organized by system, starting with primary engine components like the cylinder head, camshaft, crankshaft, and transmission. It then covers the fuel system, chassis, electrical routing, and tuner-specific suspension hardware. If you are looking for actual maintenance procedures, you can explore standard OEM service manuals.
Specifications & Reference Data
The manual includes complete reference tables detailing factory part numbers, descriptions, and required fastener quantities for the 5TA-series build. It outlines hardware specific to the 449cc, 12.5:1 compression 5TA1-series YZ450FR, alongside reference values like the 1.2-liter coolant capacity and 0.10–0.15 mm intake valve clearance. Because using the exact hardware and correct torque specifications is critical for the safe operation of high-performance dirt bikes, always verify part numbers and assembly data against this catalog before riding.
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