1985-1987 Honda FourTrax 250 / TRX 250 Service Manual

Official factory service and repair manual for 1985-1987 Honda FourTrax 250 and TRX 250 ATVs. Covers all systems, maintenance, and troubleshooting.

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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 FourTrax 250, TRX 250
Build Years: 1985–1987
Technical Data:

  • Engine: Gasoline, air-cooled 4-stroke, single-cylinder inclined 20°
  • Displacement: 246 cc
  • Bore x Stroke: 74 x 57.3 mm
  • Compression Ratio: 9:1
  • Transmission: 5-speed constant mesh with reverse
  • Maximum Power: 19.3 HP at 7,000 rpm
  • Maximum Torque: 2.03 kg-m at 6,000 rpm
  • Fuel Capacity: 10.0 liters (including 2.0-liter reserve)
Technical Specifications
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Document Number / Seller:
30887 / Christopher Diaz
File Size:
25.72 MB
File Type:
PDF
Language:
English
Pages:
233
Printable:
Yes
Category:
ATV
Last updated / verified
Apr 19, 2026

Honda Manual Features & Content Preview

Honda FourTrax 250 and TRX 250: Technical Coverage

  • Covers 1985–1987 Honda FourTrax 250 and TRX 250 ATVs including specific service requirements for both '85 and subsequent models
  • Official Honda factory service publication, documenting engine, chassis, and electrical system specifications
  • Contains 80+ exploded-view assembly diagrams and complete torque specification tables for critical fasteners
  • Downloads to your account within seconds of checkout
  • Your order stays downloadable from your account for life
  • Indexed PDF search covers every chapter and appendix
  • OCR text layer lets you jump to a torque spec by keyword
  • This 1985–1987 service manual is the definitive technical document for maintaining the 246 cc air-cooled FourTrax engine and semi-automatic drivetrain

Manual Content and Scope

The 1985–1987 Honda FourTrax 250 service manual provides a structured look at maintenance and engine removal. The document includes detailed exploded-view assemblies for the 4-stroke engine, manual clutch, centrifugal clutch, and the 5-speed constant mesh transmission. It documents the lubrication system, including pump and filter maintenance, and covers steering geometry for the front suspension.

The electrical section lists reference values for the CDI ignition, alternator output, and charging system. Detailed information for the braking system describes maintenance for both the front hydraulic and rear cable-operated drum brakes. The maintenance section includes schedules for regular inspections based on operating conditions and environmental usage.

Technical Data Preview

Engine compression is documented at 12.5 kg/cm² for the 246 cc engine in the maintenance section. Intake and exhaust valve clearance is specified at 0.08 mm in the cylinder head specification table. Cylinder head cap nut torque is listed at 35–45 Nm (25–33 ft-lb).

For those performing seasonal work, what an OEM service publication covers includes detailed instructions on oil filter replacement and final drive oil capacity. The manual also contains specific wear limits for the piston, cylinder, and clutch components. The 233-page Honda FourTrax 250 and TRX 250 factory service manual provides essential reference values for maintenance and engine service for the 1985–1987 generation of these air-cooled ATVs.

Document Reference: Honda Service Manual 85-87 TRX 250 FOURTRAX 250, 233 pages

Manual FAQ, Purchase & Download Details

Can I find wiring diagrams and electrical system references within this service manual? keyboard_arrow_down

Document contains detailed sections for electrical systems, including ignition, battery, charging, and starter systems, as well as cable and harness routing diagrams.

Which engine and chassis specification tables are provided for the Honda FourTrax 250? keyboard_arrow_down

Manual includes comprehensive specification tables covering engine displacement, bore and stroke, compression ratios, and valve train details. It also contains frame dimensions, tire pressures, and suspension geometry data to support technical referencing.

What kind of tightening specifications and torque values are listed in the manual? keyboard_arrow_down

Manual features dedicated sections with torque value tables for both engine and frame components, categorized by item and thread diameter. These tables provide the necessary reference ranges in Newton-meters, kilogram-meters, and foot-pounds for various bolts and nuts.

Does this manual contain exploded views or component breakdown illustrations for the Honda FourTrax 250? keyboard_arrow_down

Document includes system illustrations and assembly diagrams for major components to help visualize the internal structure of the FourTrax.

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