2006-2011 Honda TRX250EX / TRX250X Factory Service Manual

• Official 371-page Honda OEM factory publication covering the 2006–2011 TRX250EX and TRX250X ATVs.
• Details the air-cooled 229 cc longitudinal engine platform and fuel delivery systems across 2006–2007 and post-2007 regional variants.
• Provides 124 exploded-view diagrams, 18 detailed electrical schematics, and comprehensive torque tables.
• Serves as the primary reference for SportClutch transmission tear-downs and rebuild specs.

Engine and Chassis Maintenance Data

When you pull a TRX250 into the bay, having exact tolerances on hand is critical. This manual breaks down the longitudinal-mount single-cylinder power unit from top to bottom. You get precise data on the lubrication system, including oil pump clearances and relief valve operation thresholds. Dealing with a bogging issue? The fuel system chapters outline the exact main and slow jet identification for the PDC1G carburetor assembly.

It also dives deep into the SportClutch system. The documentation details centrifugal and multi-plate clutch components, specific gear ratios for the 5-speed box, and acceptable shift fork tolerances. Before applying any of these specifications or torquing down components, always ensure the ATV is securely supported on a proper lift and the battery is disconnected to prevent accidental starting or injury during maintenance.

Specification Previews

Professional service demands hard numbers. The cylinder head specification tables dictate a strict 0.13 mm intake valve clearance. Engine health diagnostics rely on accurate baseline metrics, with the manual documenting cylinder compression at 1,275 kPa at 800 rpm for this series.

Fluid capacities are clearly defined, noting a shift from the 10.2-liter fuel tank in 2006–2007 units to the 9.5-liter capacity found on post-2007 models. This document serves strictly as a comprehensive index of technical data and assembly overviews, empowering mechanics to verify parts and tolerances against factory standards.