2004-2009 Honda TRX 450R / TRX450ER Service Manual

Honda TRX 450R/ER 2004–2009 Technical Coverage

• Built for owners and professional workshops servicing the 2004–2009 Honda TRX 450R and TRX 450ER Sportrax, including both kickstart and electric-start variants
• Original OEM publication, 523-page service reference detailing factory maintenance and assembly standards
• Contains 47 exploded-view diagrams, 16 comprehensive wiring harness and cable routing schematics, and 28 detailed torque specification tables
• Downloads to your account within seconds of checkout
• Re-download the file any time, no expiration
• Full-text search finds any part number in seconds
• Laid out for standard letter and A4 printing
• This 523-page manual acts as the primary factory documentation for the entire 2004–2009 TRX450 generation, featuring dedicated sections for the updated engine and electrical specifications introduced after 2005

Procedural and System Coverage

The 2004–2009 Honda TRX 450R/ER service manual provides detailed data on the vehicle’s mechanical systems. The document outlines the frame and body assembly, including seat, fender, and exhaust removal. Sections cover the Unicam valve train design, providing specifications for intake and exhaust valve clearances, cam lobe heights, and valve spring free lengths. Lubrication system data details the twin-sump setup, documenting oil capacities for engine and transmission, pump rotor tolerances, and seal point requirements. Electrical system coverage lists peak voltage values for ignition coils, exciter coils, and alternator output for both kickstart and electric-start configurations.

Specifications and Reference Values

The manual includes extensive tables for standard and service-limit specifications across all TRX450 engine and chassis variants. Cylinder head bolt torque is specified at 54 Nm (40 lbf-ft) in the assembly data. Intake valve clearance for the 2004–2009 Honda TRX 450R is listed at 0.16 ± 0.03 mm. Transmission oil capacity for the 2004–2005 models is documented at 0.55 liters after draining. These factory workshop documentation structures ensure accurate part replacement and assembly for the 2004–2009 Honda TRX 450R/ER. Reference only — always consult a certified technician before performing service on this equipment.

This 523-page official Honda service manual covers the 2004–2009 Honda TRX 450R and TRX 450ER, documenting engine, chassis, electrical, and fuel-injection specifications for the complete 2004–2009 production range.