Honda TRX450R Sport ATV - Factory Service Manual (2004-2005)
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Sample pages from the Honda TRX450R Sport ATV - Factory Service Manual (2004-2005) manual
Purchase Information
Technical Specifications
- Document Number / Seller:
- 28611 / Michael King
- File Size:
- 28.96 MB
- File Type:
- Language:
- English
- Pages:
- 333
- Printable:
- Yes
- Estimated Download Time:
- 0.59 Minutes
- Delivery Format:
- Digital (PDF) - Instant Access
- Category:
- ATV
- Brand:
- Honda
- Reviewed and Approved:
- Dec 24, 2025
Honda Models and Parts Covered in this ATV Manual
- TRX450R (2004-2005)
Complete Manual Information
2004-2005 Honda TRX450R Sport ATV - Factory Service Manual
Keep your legendary sport machine in top-tier condition with the official Factory Service Manual for the 2004-2005 Honda TRX450R. This high-performance ATV is known for its race-bred technology, and this manual provides the professional-level technical depth required to maintain its dominance on the trail or the track.
Whether you are a professional mechanic or a dedicated TRX enthusiast, this guide covers every aspect of the vehicle, from the unique Unicam engine design to the specialized twin-sump lubrication system. This is not a generic aftermarket guide; it is the comprehensive technical resource used by Honda technicians to ensure peak operating performance and safety.
Targeted Model Coverage
This manual is exclusively focused on Honda's premier sport quad of the era:
- Honda TRX450R (2004-2005)
Technical Highlight: The 2004-2005 TRX450R features a high-performance 449.7 cm³ liquid-cooled engine with a 10.5:1 compression ratio and the innovative Unicam system. This manual provides the exact specifications for the 42mm piston valve carburetor and the specialized cable-operated clutch system.
Exclusive Technical Data & Identification
For precise maintenance and parts ordering, this manual includes essential identification data:
- Vehicle Identification Number (VIN): Located on the front side of the frame.
- Engine Serial Number: Stamped on the left side of the crankcase.
- Carburetor Identification Number: Stamped on the left side of the carburetor body (QA16A).
- Color Codes: Identification label located on the left front frame pipe for ordering matching body panels.
Comprehensive Workshop Content
- Engine & Unicam System: Complete teardown and assembly of the 449.7cc engine, including valve clearance adjustments (0.16mm Intake / 0.28mm Exhaust) and decompressor system timing.
- Twin-Sump Lubrication: Detailed procedures for managing the separate oil supplies for the crankshaft and transmission, ensuring zero contamination of the engine oil.
- Fuel & Exhaust: Full service for the 42mm carburetor, including pilot screw adjustments, hot start system maintenance, and spark arrester cleaning.
- Chassis & Suspension: Service for the double wish-bone front suspension and the single-tube rear damper, including compression and rebound damping adjuster settings.
- Cooling & Electrical: Full diagnostics for the liquid-cooling system and the AC-CDI ignition system, complete with wiring diagrams and peak voltage testing.
- Braking System: Maintenance for the hydraulic disc brakes, including bleed procedures and pad wear limit specifications.
Professional Features for the DIY Mechanic
- Precision Torque Values: Exhaustive tables for every engine and frame fastener to prevent component failure.
- Advanced Troubleshooting: Systematic guides for engine performance, handling issues, and electrical faults.
- Fluid Specifications: Exact capacities for engine oil (0.82L after filter change) and transmission oil (0.55L), including recommended API/JASO standards.
- Detailed Diagrams: High-quality illustrations showing cable and harness routing, exploded views of the crankcase, and cooling system flow.
Master the maintenance of your Honda TRX450R with the only manual that provides the factory-spec information needed for serious repairs and long-term reliability.
Download Instructions for Honda ATV Manual
Frequently Asked Questions - Honda ATV Manual
Is this manual suitable for beginners?
Yes, this Honda manual is designed for both professional technicians and DIY enthusiasts. It includes step-by-step procedures with clear illustrations and safety guidelines for ATV maintenance and repair.
What file format will I receive?
You will receive this manual as a PDF file (28.96 MB), which is compatible with all devices. The manual is fully searchable and printable for your convenience.
How quickly can I access the manual after purchase?
You'll receive instant access to your Honda ATV manual immediately after payment completion. The download link is valid for 3 days, with lifetime re-download guarantee.
Can I print specific sections of the manual?
Absolutely! This digital manual allows you to print any section you need, from individual pages to complete chapters, making it perfect for workshop use.
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