1986-1989 Honda TRX250R FourTrax Service Manual

Wiring diagrams, specifications, and repair sequences for your 1986-1989 Honda TRX250R FourTrax 250R. Publication C4085-91017.

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Document Details

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Document Number / Seller:
24443 / Joshua Boyd
File Size:
13.62 MB
File Type:
ZIP
Language:
English
Pages:
224
Printable:
Yes
Category:
ATV
Last updated / verified
Oct 14, 2025

Models Covered & Key Technical Specifications

Honda TRX250R FourTrax 250R (Honda Motor Corporation Ltd) Manual: Honda TRX250R FourTrax 250R, 1986-1989 models Reference Resource Documentation | Series Series

  • Design Charge Quantity: 0.7 lit (0.74 U.S. qt.) signifies the engine oil capacity Standards.
  • Key Alignment Specs: For rear axle outer lock nut, 80–100 N·m (8.0–10.0 kg-m, 58–72 ft-lb) defines the torque specification Bounds.
  • Prescribed Power Framework: 35 N·m (3.5 kg-m, 25 ft-lb) -- denotes the torque for the rear caliper bracket mounting bolt Topology.
  • Nominal Throughput Data: The formatter board requires 64 MB for standard operation Logic.
  • Design Gross Dimensions: The front wheel hub nut requires 120–170 N·m (12.0–17.0 kg-m, 87–123 ft-lb) for proper tightening Matrix.
  • Designated Capacity Limits: The caliper mounting bolt requires 20–30 N·m (2.0–3.0 kg-m, 14–22 ft-lb) for secure installation Standards.

Professional Workshop Service Manual & Technical Specifications

Honda TRX250R FourTrax 250R Manual: Honda TRX250R FourTrax 250R, 1986-1989 models

Design-Core: TRX250R FourTrax 250R / Honda Motor Corporation Ltd // Model-Portfolio: ATV / FourTrax Logic // Coverage-Scope: 1986, 1987, 1988, 1989 technical-details.

Technical chapters are organized around:

  • Front Brake System Diagrams
  • Rear Suspension Specifications
  • Engine Removal Procedures
  • Drive Train Torque Values
  • Troubleshooting Guides

Completely establishing the operational parameters for the TRX250R FourTrax 250R, this manual details the systems and procedures necessary for maintenance and repair. It serves as a crucial resource for understanding the vehicle's complex layout.

Front Brake System Information

Inspection guidelines are provided for brake pads and discs, covering thickness and runout measurements. This section includes details on caliper mounting and disassembly.

Rear Suspension Component Overviews

Alignment specifications are included for shock absorber spring preload and damper rod compression force. It details the necessary procedures for swingarm and linkage maintenance.

Engine Core Procedures

Reference data is included for engine removal, including torque specifications for mounting bolts. It also outlines the procedures for transmission and crankshaft service.

Drive Train Maintenance

This manual covers the drive chain slack inspection and adjustment procedures. It also details the installation and removal of the final driven sprocket.

Troubleshooting and Diagnostics

Diagnostic procedures are covered for common issues such as brake lever/pedal sponginess and brake drag. It provides insight into identifying and resolving mechanical problems.

This document documents torque specifications for various components to ensure proper service interval reliability.

FAQ

What **necessary** electrical values are specified for the TRX250R's charging system? keyboard_arrow_down

10-14 N·m is specified for the front master cylinder holder mounting.

Determine the **recommended** calibration settings for the carburetor idle speed. keyboard_arrow_down

Idle speed should be set to 1,500 ± 150 rpm for optimal performance.

What **calibrated** clearance measurements are provided for the rear axle bearings? keyboard_arrow_down

3.0 mm (0.12 in) is the service limit for rear axle runout.

Check the **applicable** torque specifications for the swingarm pivot nut. keyboard_arrow_down

70–110 N·m (7.0–11.0 kg-m, 51–80 ft-lb) is the torque range for the swingarm pivot nut.

Customer Reviews

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Reviews (5)

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This service manual is a must-have for anyone working on the 1986-1989 Honda TRX250R. The detailed sections on maintenance and troubleshooting are invaluable!
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This manual covers everything from engine removal to electrical systems. I found the torque values particularly helpful when reassembling my ATV. No regrets!
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I received the download link in my email almost instantly after purchase. The manual is very thorough and easy to navigate. Highly recommend!
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I had a question about a specific section and emailed support. They responded quickly and were very helpful. Overall, a great experience!
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The manual is packed with information which is great, but it can be a bit overwhelming at first. Still, it's a fantastic resource for any DIY mechanic!