2007-2008 Honda TRX420 Rancher Service Manual

Addresses TRX420FE/FM/TE/TM systems including engine, fuel, and electrical components. PN 07ZAJ-S5A0111 and other critical part numbers are listed.

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Technical Safety Notice
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This official OEM document is intended for professional technicians and skilled operators. Performing service on mechanical equipment involves inherent risks. By purchasing, you acknowledge that RepairLoader provides original manufacturer data for informational purposes. Always prioritize safety: use correct tools, wear protective gear, and consult a certified professional if you are uncertain of any procedure.

Honda Models Covered & Key Technical Specifications

Models: Honda TRX420, Fourtrax Rancher
Sub-models / Variants: TRX420FE (4WD/Electric Shift Program), TRX420FM (4WD/Foot Operated Gearshift), TRX420TE (2WD/Electric Shift Program), TRX420TM (2WD/Foot Operated Gearshift)
Build Years: 2007–2008
Technical Data:

  • Engine: Single cylinder, liquid-cooled, OHV, 420 cc displacement
  • Transmission: 5-speed constant mesh with reverse, automatic centrifugal wet clutch
  • Fuel System: PGM-FI (Programmed Fuel Injection) with 34 mm throttle bore
  • Engine Oil Capacity: 2.7–3.1 liters (after draining/disassembly)
  • Coolant Capacity: 1.5 liters (radiator and engine)
  • Ignition System: Full transistorized ignition
Technical Specifications
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Document Number / Seller:
28922 / Stephanie Parker
File Size:
40.84 MB
File Type:
PDF
Language:
Pages:
498
Printable:
Yes
Category:
ATV
Last updated / verified
May 27, 2025

Honda Manual Features & Content Preview

Technical Scope for the 2007–2008 Honda TRX420 Rancher

  • Covers 2007–2008 Honda TRX420 FourTrax Rancher utility ATVs including 2WD/4WD and Electric Shift Program (ESP) or manual foot-shift variants
  • Official Honda Motor Co. publication 07ZAJ-S5A0111
  • Includes 12 wiring schematics and 14 detailed torque specification tables for engine, frame, and drivetrain components
  • Files download to your account within seconds of checkout
  • Unlimited re-downloads tied to the purchase record
  • Suitable for printing individual sections for shop-floor use
  • Indexed PDF search covers every chapter and appendix
  • This 2007–2008 first edition is the primary OEM technical reference for the 420cc PGM-FI engine platform and related chassis configurations

Component and Systems Documentation

The 2007–2008 Honda TRX420 Rancher workshop manual provides detailed information on all major assemblies, covering the fuel-injected engine, cooling systems, and specialized 4WD mechanisms. The text transitions through general maintenance, detailing fluid capacities, filter replacement, and tire pressure standards, before moving into deeper mechanical sections. Chapters address the clutch and gearshift linkage, frame body panels, suspension geometry, and the complex electrical architecture, including the Powertrain Control Module (PCM) and sensor reference signals.

Engine and Chassis Specification Highlights

Engine compression is documented at 500 kPa (73 psi) at 400 rpm, while intake valve clearance is set at 0.15 ± 0.02 mm. Coolant system radiator cap pressure is specified at 108–137 kPa (16–20 psi) for proper thermoregulation. The 2007–2008 Honda TRX420 Rancher charging system output for the alternator is listed at 0.343 kW at 5,000 rpm. Detailed lubrication and sealant point maps guide the assembly of the crankcase, alternator cover, and shift control motors. All service data shown here is for reference only — qualified technicians and the original OEM documentation remain the authoritative source for any hands-on work. This 498-page factory service manual documents the complete mechanical and electrical specifications, maintenance schedules, and assembly parameters for the 2007–2008 Honda TRX420 Rancher family, serving as a primary resource for workshop maintenance.

Manual FAQ, Purchase & Download Details

Are the major system chapters for engine, transmission, and electrical components included in this service manual? keyboard_arrow_down

Manual contains dedicated sections for the engine, transmission, cooling system, and electrical components. It covers these areas through structured chapters that provide technical details and specification tables for the identified systems.

Does the document provide coverage for the cylinder head and piston assembly specifications? keyboard_arrow_down

General Information section contains detailed specification tables for both the cylinder head valve train and the cylinder piston assembly.

Can I find fluid capacities and recommended lubricant types in the specification tables? keyboard_arrow_down

Document lists fluid capacities for the cooling system and engine oil within the General Information chapter. These tables also include specifications for recommended fluids and lubricants for the various systems.

Is the publication number 07ZAJ-S5A0111 officially referenced within this 498-page PDF? keyboard_arrow_down

Yes, the document includes publication number 07ZAJ-S5A0111 as a reference for the 2007-2008 Honda TRX420 Rancher service manual.

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