Honda TRX420 FA FPA AT Fourtrax Rancher 2009-2011 Service Manual

Autoevolution's own model description captures exactly what made this Rancher variant genuinely distinctive within Honda's broader ATV lineup: "this middleweight machine is loaded with all the nifty features one might expect from a top-notch Honda ATV: convenient and easy-to-use electric shifting, a fast and seamless automatic clutch, independent rear suspension and selectable 2/4WD with torque-sensitive front differential and fully-locked option." The "AT" designation genuinely signals what sets this Rancher apart from its manual-shift siblings — a real automatic transmission option that keeps working riders focused on the terrain rather than clutch and gear management.

Power comes from a 420cc single-cylinder engine fed through Honda's PGM-FI fuel injection system, delivering output through Honda's proven automatic transmission architecture — autoevolution's own review of the related model notes the drivetrain "delivers the optimal power and torque from its 5-speed gearbox with no power loss between the gears," genuinely useful when navigating slanted slopes or technical terrain where a rider needs to stay focused purely on steering rather than worrying about running out of power mid-shift.

The TRX420FA (without power steering) and TRX420FPA (with Electric Power Steering) share this identical core drivetrain and chassis, differing purely in whether EPS is factory-fitted — a genuine convenience option for riders wanting reduced steering effort in technical terrain or heavy front-mounted implement work. Standard equipment across both variants includes independent rear suspension for genuinely consistent traction across uneven ground, disc brakes at all wheels for dependable stopping power, and selectable 2WD/4WD with a torque-sensitive front differential offering a fully-locked option for maximum traction when conditions demand it. Autoevolution's own coverage confirms the platform's genuinely broad appeal — "great for working around the farm or ranch, and for leisure activities, such as hunting, fishing, hill climbing or plain old fun on the forest trails."

The factory service manual for this generation runs to a genuinely comprehensive 605 pages, covering general information and technical features, frame and body panel service, lubrication and fuel system work specific to the PGM-FI injection system, cooling system service, full engine teardown from cylinder head through crankshaft and balancer work, the centrifugal clutch and automatic transmission, front and rear suspension and steering, the complete brake system, front and rear driving mechanisms including the selectable 4WD system, battery and charging, ignition, electric starter service, and a dedicated Electric Power Steering (EPS) chapter specifically for FPA-equipped models — genuinely thorough coverage reflecting how much additional complexity the automatic transmission and EPS options add over a simpler manual-shift ATV.

This factory service manual covers the procedures, torque specs, and diagrams needed to keep a 2009-2011 TRX420FA/FPA FourTrax Rancher AT running the way it was built to.