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Harley-davidson

1991-1992 FLST FXLR FXST Softail Motorcycle Repair Manual

1991-1992 FLST FXLR FXST Softail Motorcycle Repair Manual

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Vehicle data plateRef 418481
Brand
Harley-davidson
Vehicle
Motorcycle
Models covered
FLST, FXLR, FXST, Harley Davidson, Motorcycles, Super Glide
Years
1991, 1992
Format
PDF, searchable, print-ready
Delivery
Instant download after checkout
Language
English

What happens after you pay

  • Download link opens on the order page immediately
  • The same link is emailed to you — re-download any time
  • Open on phone, tablet or PC; print only the pages you need
  • Not sure it covers your model year? Ask us before you buy
🏷️ Basic Information
Identification
Make:
Harley-Davidson
Models Covered:
FLSTC Heritage Softail Classic, FLSTF Fat Boy, FXLR Low Rider Custom, FXSTC Softail Custom, FXSTS Springer Softail, FXSTSB Bad Boy
Model Years Covered:
1991, 1992
Generation
Softail Platform:
This manual covers models belonging to the Harley-Davidson Softail family, known for its distinctive hidden rear suspension system mimicking a hardtail frame.
👋 Introduction
Market Position
Segment:
Cruiser Motorcycles (Harley-Davidson's iconic Softail line).
Competitive Analysis
Competitors:
During this era, key competitors in the cruiser segment included models from Japanese manufacturers like Honda (Shadow series), Yamaha (V-Star series), Kawasaki (Vulcan series), and Suzuki (Intruder series), as well as other American brands like Indian.
Key Features
Manual Advantage:
Provides detailed, model-specific information for owners and technicians, facilitating proper maintenance and repair, especially valuable for older models.
Digital Benefit:
Offers convenience and accessibility, allowing users to access repair information instantly on various devices, even in remote locations.
📋 Manual Details
Coverage Areas
Primary Coverage:
Comprehensive repair, maintenance, and troubleshooting for the specified 1991-1992 Harley-Davidson Softail models.
Secondary Coverage:
Includes information useful for parts lookup and routine ownership tasks.
Manual Type
Type:
Repair Manual / Service Manual
Language
Language:
English
Format
Format:
Electronic Download (PDF)
📖 Manual Coverage
Systems Covered
Powertrain:
Engine, transmission, drive chain and sprockets, lubrication and cooling systems.
Chassis:
Frame, steering system, shocks (suspension), wheels, brakes, and bodywork.
Electrical:
Complete electrical system including wiring diagrams, ignition, lighting, and accessories.
Fuel System:
Fuel tank, fuel lines, carburetor (likely Keihin CV or similar for the era), and fuel pump (if applicable).
Intake Exhaust:
Air intake system and exhaust system components and servicing.
Procedures Included
Maintenance:
Routine maintenance tasks, fluid changes, filter replacements, lubrication, and tune-ups.
Repair:
Detailed step-by-step repair procedures for various components and systems.
Troubleshooting:
Advanced troubleshooting guidance for diagnosing and resolving common and complex issues.
Installation:
Procedures for engine removal and installation.
Technical Depth
Depth:
Comprehensive, covering from basic adjustments to major overhauls and diagnostics.
📊 Manual Specifications
File Format
Format:
PDF
Searchability:
Likely searchable text within the PDF for efficient information retrieval.
Print Quality
Quality:
Assumed high-quality digital reproduction, allowing for clear printing of individual pages.
Binding Type
Type:
N/A (Digital Download)
Paper Type
Type:
N/A (Digital Download)
Delivery
Method:
Instant download after payment confirmation.
Support
Policy:
Lifetime Protection Policy for lost or damaged downloads.
⚙️ Engine Specifications
Primary Engine
Type:
Air-cooled, Evolution (Evo) V-twin engine.
Displacement:
Primarily 1337cc (81.5 cubic inches) for most models, with potential variations. Some earlier or specific models might have had 1200cc variants, but the 1991-1992 Softail lineup largely featured the 80ci Evo.
Bore X Stroke:
Approx. 3.496 in. x 4.250 in. (88.8 mm x 108.0 mm) for the 80ci engine.
Compression Ratio:
Typically around 8.5:1 to 9.0:1.
Fuel System:
Carburetor (likely Keihin CV 36mm or similar for this period).
Performance
Horsepower:
Estimated around 55-60 hp (at crankshaft), though official figures were not always prominently published.
Torque:
Estimated around 65-70 lb-ft (at crankshaft).
Lubrication
System Type:
Dry-sump lubrication system with an oil tank typically located in the frame cradle.
Cooling
System Type:
Air-cooled.
🔧 Transmission
Standard
Type:
5-speed manual transmission.
Drive Type:
Belt drive to the rear wheel (primary drive).
Features
Clutch:
Wet multi-plate clutch, operated by a cable-actuated lever.
Fluid Specifications
Transmission Oil:
Specific Harley-Davidson transmission fluid or equivalent SAE 75W-90 gear oil is typically recommended. Check manual for exact type and quantity.
📐 Dimensions
Exterior
Wheelbase:
Varies by model, but typically in the range of 63-65 inches.
Weights
Dry Weight:
Typically in the range of 575-630 lbs (260-285 kg), depending on the specific model and equipment.
🛡️ Safety Features
Ratings
Crash Test Results:
Motorcycles of this era were not subject to the same rigorous crash testing standards as automobiles. Safety is primarily dependent on rider skill and proper maintenance.
Active Features
Braking System:
Front and rear disc brakes. Typically a dual-piston caliper front and a single-piston caliper rear.
Passive Features
Lighting:
Headlight, taillight, brake lights, and turn signals.
💡 Technology Features
Infotainment
Features:
Basic instrumentation: speedometer, odometer, tachometer (on some models), engine warning lights. No integrated infotainment systems.
Driver Assistance
Features:
None. Motorcycles of this era rely entirely on rider input and mechanical systems.
Connectivity
Features:
None. No electronic connectivity features.
🔧 Maintenance
Service Intervals
Oil Change:
Typically recommended every 2,500-3,000 miles or annually, whichever comes first. Refer to manual for precise interval.
Primary Chain Tension:
Regular checks and adjustment are critical for belt-drive motorcycles, usually around 5,000-mile intervals. Check manual.
Spark Plugs:
Replacement typically recommended every 7,500-10,000 miles.
Fluid Specifications
Engine Oil:
Viscosity typically SAE 20W-50 or SAE 25W-50 motorcycle-specific oil. Harley-Davidson's own V-Twin synthetic or conventional oil is often recommended. Check manual for exact type and capacity (usually around 3 quarts).
Brake Fluid:
DOT 4 or DOT 5 brake fluid (depending on system type and year, check manual carefully as mixing is problematic). Harley-Davidson typically specified DOT 5 for this era, but confirmation is vital.
Primary Chain Case Oil:
Specific primary chain case lubricant or SAE 20W-50 engine oil. Check manual for exact type and capacity.
Known Issues
Evo Engine:
While generally robust, common areas for attention include oil leaks from seals and gaskets, potential cam bearing wear (especially on higher mileage units), and carb tuning.
Rear Suspension:
Shock absorbers may require service or replacement due to age and mileage. Check for leaks or sagging.
Electrical:
Aging wiring harnesses, connections, and components (e.g., voltage regulators, ignition modules) can be sources of intermittent issues.
Carburetor:
Keihin CV carburetors can sometimes be prone to diaphragm tears or adjustment drift, requiring tuning or rebuilding.
📚 Vehicle History
Brand Heritage
Legacy:
Harley-Davidson, founded in 1903, is an iconic American motorcycle manufacturer with a rich heritage in V-twin engines and the cruiser segment.
Model Evolution
Softail Introduction:
The Softail platform, designed by Bill Davis and later refined by Harley-Davidson, was introduced in 1984, offering a smoother ride than traditional hardtail frames while maintaining the classic appearance.
Production
Manufacturing Location:
United States (primarily York, Pennsylvania and Milwaukee, Wisconsin).
Engine Development:
The Evolution engine (Evo) was introduced in 1984 for the Softail models, replacing the Shovelhead engine, and became a cornerstone of Harley-Davidson's lineup for many years due to its reliability and performance.
🏆 Awards & Recognition
Recognitions
Model Acclaim:
The Harley-Davidson Evolution engine and the Softail platform were highly acclaimed for their distinctive styling, torque, and the iconic Harley-Davidson riding experience, solidifying their place in motorcycle history.
Ratings
Reliability:
The Evolution engine is generally considered reliable when properly maintained. Many of these models remain in regular use, a testament to their enduring design.

Delivery & file format

This is a digital PDF download, not a printed book. After payment the download link appears on your order confirmation page and is emailed to the address you entered. Files open in any PDF reader on phone, tablet or computer and can be printed.

Check the model year and engine before you buy

Manufacturers change procedures, wiring and part numbers between model years and engine options. If your VIN plate shows a year or engine code that is not listed on the data plate above, contact us with the model, year and VIN and we will confirm coverage before you order.

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