Factory Service Manual for Harley-Davidson FX/Softail Models, covers 1985–1990

1985–1990 Harley-Davidson FX/Softail Models: Official Factory Service Manual

Maintain your classic Evolution-era Harley-Davidson with the same precision as the factory technicians. This Official Factory Service Manual (Part No. 99482-90) is the definitive resource for the 1985 to 1990 FX and Softail model range. Whether you are performing a routine oil change or a complete engine overhaul, this manual provides the technical depth required to keep your machine in peak operating condition.

Master Your Evolution Engine and Chassis

The 1985–1990 period represents a pivotal era for Harley-Davidson, featuring the refinement of the 1340cc Evolution engine and the expansion of the iconic Softail line. This manual covers the unique nuances of these models, from the early FXWG Wide Glide to the introduction of the legendary FLSTF Fat Boy. It provides the specific torque values, clearance tolerances, and troubleshooting steps that generic aftermarket manuals often overlook.

Supported Models and Years

This manual is specifically tailored for the following Harley-Davidson motorcycles:

• FXEF Fat Bob (1985)
• FXSB Low Rider (1985)
• FXWG Wide Glide (1985-1986)
• FXST Softail Standard (1985-1990)
• FXSTC Softail Custom (1986-1990)
• FLST Heritage Softail (1987-1990)
• FLSTC Heritage Softail Classic (1988-1990)
• FXSTS Springer Softail (1988-1990)
• FLSTF Fat Boy (1990)

Critical Technical Information

This manual is structured into eight primary sections for easy navigation on mobile devices or at the workbench:

1. Product: Includes detailed VIN (Vehicle Identification Number) breakdown and model identification.
2. Chassis: Comprehensive service for forks, shocks, brakes, and the unique Softail rear suspension setup.
3. Engine: Full specifications for the 1340cc Evolution V-Twin, including the Cam/Pinion Gear Color Code Chart for precise gear matching (1989 & earlier models).
4. Fuel System: Detailed maintenance for carburetors and fuel delivery components.
5. Electric Starter: Troubleshooting and repair for the starting system.
6. Drive: Primary chain adjustment, clutch service, and final drive maintenance.
7. Transmission: Complete 5-speed transmission teardown and assembly.
8. Electrical: Full wiring diagrams and ignition system diagnostics (Section 8).

Why This Official Manual is Essential

Generic guides cannot match the level of detail found in the Official Factory Manual. For example, this document includes the specific "Cam/Pinion Gear Color Code Chart" (e.g., Orange 24040-78 to Black 24046-78) used to ensure quiet and efficient engine operation. Following these factory-authorized procedures ensures that your motorcycle conforms to safety, dependability, and emission standards.

Designed for the professional mechanic and the dedicated DIY enthusiast, this manual ensures your investment is protected and your Harley-Davidson remains road-ready for years to come.