1985-1987 Honda TRX250 Fourtrax ATV Service Manual

Technical reference covering Honda TRX250 Fourtrax models from 1985-1987, detailing all aspects of maintenance, repair, and specifications. Part number C4085-91017.

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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: 1985-1987 Honda TRX250 Fourtrax
Build Years: 1985–1987
Technical Data:

  • Engine: 246 cc, air-cooled 4-stroke, single cylinder
  • Horsepower: 19.3 HP @ 7,000 rpm
  • Transmission: 5-speed constant mesh with reverse
  • Compression: 12.5 kg/cm² (178 psi)
  • Fuel tank capacity: 10.0 liters (2.6 US gal)
  • Dry weight: 212–217 kg (467–478 lb)
  • Valve clearance (cold): 0.08 mm (0.003 in) intake/exhaust
Technical Specifications
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Document Number / Seller:
29494 / Andrew Crawford
File Size:
31.71 MB
File Type:
PDF
Language:
English
Pages:
233
Printable:
Yes
Category:
ATV
Last updated / verified
Dec 23, 2025

Honda Manual Features & Content Preview

Honda TRX250 Fourtrax: Technical Scope and Data

  • Covers 1985–1987 Honda TRX250 Fourtrax ATV models, including all '85 and after-'85 production variants
  • Original OEM publication, referenced for technical specifications and factory-standard workshop procedures
  • Contains 47 exploded-view diagrams, 27 torque tables, and multiple detailed electrical routing schematics
  • Delivered as a direct download the moment payment clears
  • Indexed PDF search covers every chapter and appendix
  • Stored against your account so you can retrieve it after a hard-drive loss
  • This 1985–1987 Honda TRX250 factory manual is the foundational reference used for the Fourtrax model line, providing the only authorized service values for the engine and chassis build.

What the Manual Documents:

This 1985–1987 Honda TRX250 service manual provides structured documentation for maintenance, engine top-end overhaul, and drivetrain repair. The manual details procedures for the air-cooled single-cylinder engine, including cam timing, valve clearance adjustments, and cylinder-piston inspection. Chassis sections outline steering head bearing maintenance, suspension checks, and drive shaft lubrication. Electrical sections provide reference values for CDI components, lighting systems, and charging circuits.

Specification Highlights:

Reference tables list torque requirements for engine covers and suspension bolts in Nm and ft-lb. The manual documents a fuel tank capacity of 10.0 liters. Valve clearance for the intake is listed at 0.08 mm in the cylinder head specification table. Cylinder compression for the Honda TRX250 is documented at 12.5 kg/cm². The manual also includes how factory workshop documentation is structured for consistent mechanical results during long-term ownership. An official 233-page Honda OEM service manual covering the 1985–1987 TRX250 Fourtrax, documenting engine, chassis, electrical, and fuel-injection specifications for the 246 cc air-cooled build.

Document Reference: Original OEM publication

Manual FAQ, Purchase & Download Details

Which file format is provided for this service manual to ensure compatibility with my devices? keyboard_arrow_down

Document is delivered in a standard PDF format to support viewing across a variety of digital devices.

Are the engine and transmission system chapters included in this comprehensive service publication? keyboard_arrow_down

Manual contains dedicated chapters covering engine components including the cylinder head, valves, and piston assemblies. It also lists technical information for the clutch, kick starter, and transmission gear assemblies.

Is there a reference section for wiring diagrams and electrical system components? keyboard_arrow_down

Electrical system section includes wiring diagrams, connector references, and lighting circuit data for the relevant model years.

What kind of specification tables and reference charts are featured throughout the document? keyboard_arrow_down

Manual contains detailed specification tables covering torque values for engine and frame components, as well as fluid capacities and gear backlash settings. These sections also include lists of tools required for component identification and service tasks.

Does this manual cover the range of 1985 to 1987 Honda Fourtrax 250 models? keyboard_arrow_down

Publication is specifically organized to include coverage for the 1985 through 1987 TRX250 Fourtrax ATV series. It provides technical data such as bore and stroke measurements, compression ratios, and fuel tank capacity norms applicable to these model production years. Users can reference the included serial number identification diagrams to confirm if their specific vehicle configuration is represented in the manual.

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