2004-2005 Honda TRX450R ATV Service Manual (P/N 61TFF000)

• Covers the 2004–2005 Honda TRX450R ATV, detailing full chassis, engine, and electrical diagnostics
• Official Honda OEM publication P/N 61TFF000, dated December 2003
• Contains 333 pages of technical specifications, exploded-view schematics, and mechanical assembly data
• Serves as the primary factory reference for the 2004–2005 launch build

Documentation of the Honda TRX450R 2004–2005

This official manual breaks down every major system on the TRX450R. Expect detailed insights into the Unicam cylinder head design and the unique twin-sump lubrication structure. Individual sections detail frame assemblies, body panels, and exhaust routing, providing the exact torque values required for safe fastener and skid plate mounting. Separate chapters map out the fuel system. This includes carburetor disassembly views and float level parameters, alongside comprehensive cooling pump specifications.

Further segments address engine removal and transmission maintenance. You will also find complex electrical layouts, complete wiring schematics, and specialized data for front and rear suspension geometry.

Engine and Maintenance Reference Data

The guide delivers precise numbers for critical engine work. Specifications cover valve clearances, piston-to-cylinder tolerances, and transmission gear ratios. Baseline cylinder compression is specified at 745 kPa. The lubrication system requires a 0.78-liter capacity for standard oil changes. You will find exact wear limits, such as the 0.05 mm maximum left-side crankshaft runout. Ignition timing for the AC-CDI system is mapped at 12 degrees BTDC at idle. Coolant concentration details dictate a standard 1:1 mixture with distilled water. Because safe and reliable mechanical work demands accuracy, always verify these reference figures against the complete OEM publication before applying torque to any components.