Harley Davidson Shovelhead FLH 1981 Service Repair Manual

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This manual covers the FLH, a model recognized for its iconic Shovelhead V-Twin engine. Produced in 1981, this motorcycle embodies a significant era in American motorcycling. Known for its robust...

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Taper: Motorcycle

Distributeur:

UGS: 62801

Mots clés: 1981 Engines Harley Davidson Motorcycle Shovelhead Shovelhead FLH

Variantes de produits

Description

This manual covers the FLH, a model recognized for its iconic Shovelhead V-Twin engine. Produced in 1981, this motorcycle embodies a significant era in American motorcycling. Known for its robust construction and distinctive character, the FLH has been a staple for riders seeking a classic experience. Its engineering quality and reliability are hallmarks, making it a cherished machine for enthusiasts and collectors alike. This comprehensive workshop service repair manual provides in-depth guidance for the FLH 1981. It includes detailed procedures for general information, troubleshooting, lubrication, comprehensive maintenance, tune-ups, engine overhauls, clutch, transmission, fuel systems, electrical systems, suspension, and brakes. With hundreds of illustrations and step-by-step instructions, this manual is designed to assist both do-it-yourself owners and experienced mechanics in maintaining and repairing their vehicle effectively.

🏷️ Basic Information

Identification

Make:

Harley-Davidson

Model:

Year:

Engine Type:

Shovelhead V-Twin

Chassis Code:

Product Type:

Service Repair Manual

Product Format:

PDF Download

👋 Introduction

Market Position

Value Proposition:

Inexpensive way to keep your vehicle working properly

Competitive Analysis

Alternative Sources:

Avoids overpriced paper textbooks or CD-ROMs delivered via mail

Key Features

Core Benefit:

Comprehensive factory service information for self-repair and maintenance

📋 Manual Details

Coverage Areas

Primary Coverage:

Harley-Davidson Shovelhead FLH 1981

All Styles Covered:

Page Count

Estimated Page Count:

Hundreds

Manual Type

Type:

Factory Official Workshop Service Repair Manual

Language

Language:

English

Format

File Format:

Digital Delivery:

Instant download after payment

Printable:

Yes, without restriction

Requirements

Software Requirement:

Adobe PDF Reader

📖 Manual Coverage

Systems Covered

General Information:

Included

Troubleshooting:

Included

Lubrication:

Periodic Lubrication details

Maintenance:

Comprehensive Maintenance procedures

Tune Up:

Detailed Tune-up procedures

Engine:

Complete engine overhaul and repair

Clutch:

Clutch assembly and service

Primary Drive:

Primary drive system service and repair

Transmission:

Transmission system overhaul and repair

Kickstarter:

Kickstarter mechanism service and repair

Fuel System:

Fuel system components and service

Exhaust Systems:

Exhaust system maintenance and repair

Electrical System:

Complete electrical system diagnosis and repair

Front Suspension:

Front suspension assembly and service

Steering:

Steering system components and service

Rear Suspension:

Rear suspension assembly and service

Brakes:

Brake system maintenance and repair

Wiring Diagrams:

Detailed wiring diagrams included

Procedures Included

Repair Procedures:

Step-by-step instructions based on complete disassembly

Diagnostic Procedures:

Combined troubleshooting and electrical service procedures

Assembly Disassembly:

Detailed guide for complete disassembly and reassembly

Index:

Included for easy navigation

Technical Depth

Depth:

Professional quality, in-depth service and repair

User Target:

Do-it-yourselfer and experienced mechanic

Illustrations

Illustration Quality:

Hundreds of photos and illustrations

Illustration Detail:

Detailed illustrations, drawings, and photos guide each procedure

Inset Illustrations:

Enlarged insets to examine parts in detail

Guidance Features

Instruction Format:

Numbered instructions, detailed substeps

Critical Information:

Notes, cautions, and warnings throughout each chapter

Illustration Matching:

Bold figure numbers to match illustrations with instructions

Navigation

Table Of Contents:

Numbered table of contents for fast information retrieval

📊 Manual Specifications

File Format

Format:

Compatibility:

All PC-based Windows operating systems and Mac

Print Quality

Print Capability:

Print entire manual or select pages

Binding Type

Binding:

N/A (Digital Download)

Paper Type

Paper Type:

N/A (Digital Download)

⚙️ Engine Specifications

Primary Engine

Engine Family:

Shovelhead

Engine Configuration:

Air-cooled, 45-degree V-twin

Displacement:

1340 cc (82 cubic inches)

Bore X Stroke:

3.4375 in x 4.25 in (87.3 mm x 108 mm)

Compression Ratio:

Varies by specific model and tune, typically 7.0:1 to 8.0:1

Performance

Horsepower Estimate:

Approx. 65-70 HP (actual figures vary significantly based on tune)

Torque Estimate:

Approx. 80-85 ft-lbs (actual figures vary significantly based on tune)

Fuel System

Carburetor:

Typically Keihin Butterfly or Linkert (depending on specific FLH sub-model), potentially S&S Super E/G for aftermarket upgrades

Fuel Type:

Unleaded gasoline (87 octane minimum recommended)

Ignition System

Ignition Type:

Battery and Coil with Breaker Points (standard for 1981), Electronic Ignition often an aftermarket upgrade

Lubrication

Oil Type:

API SG or SH rated, straight-weight or multi-grade 20W-50 motorcycle oil (e.g., Harley-Davidson Genuine Motor Oil)

Oil Capacity:

Approx. 3 quarts (2.8 liters) with filter change

🔧 Transmission

Standard

Type:

4-speed constant mesh

Features

Drive System:

Belt drive primary, chain drive secondary

Fluid Specifications

Transmission Fluid:

Harley-Davidson Formula+ Transmission & Primary Chaincase Lubricant or equivalent SAE 50 gear oil

Fluid Capacity

Capacity:

Approx. 1 pint (0.5 liters)

📐 Dimensions

Exterior

Wheelbase:

Approx. 63.4 inches (1610 mm)

Weights

Dry Weight:

Approx. 660 lbs (300 kg)

💡 Technology Features

Infotainment

Audio System:

Typically no factory-installed infotainment system; owners often add aftermarket stereo systems.

Driver Assistance

Features:

No electronic driver assistance features as per the era of its production.

Connectivity

Features:

No factory connectivity features; communication typically through rider's personal devices.

🔧 Maintenance

Service Intervals

Oil Change Interval:

Every 2,000-3,000 miles or 6 months, whichever comes first

Primary Chain Tension Check:

Every 2,500 miles

Spark Plug Replacement:

Every 5,000-10,000 miles (depending on type)

Fluid Specifications

Fork Oil Type:

30W or 40W motorcycle fork oil (specific grade depends on preference and fork condition)

Brake Fluid Type:

DOT 3 or DOT 4 hydraulic fluid (check master cylinder for specific requirement)

Known Issues

Common Wear Items:

Valve guides, lifter blocks, primary chain tensioner, crankshaft seals, starter clutch

Electrical Quirks:

Aging wiring harnesses, ignition system reliability (especially points)

Engine Vibrations:

Shovelhead engines are known for inherent vibration; proper balancing and maintenance are key.

📚 Vehicle History

Brand Heritage

Brand Origin:

Founded in 1903, Milwaukee, Wisconsin, USA

Model Evolution

Shovelhead Era:

Produced from 1966 to 1984, successor to the Panhead, precursor to the Evolution (Evo) engine.

Production

Model Year Significance:

1981 marked a transition period for Harley-Davidson with significant chassis and engine updates in the years prior.

🏆 Awards & Recognition

Recognitions

Historical Significance:

The Shovelhead engine is an iconic piece of American motorcycle history, celebrated for its sound, power delivery, and distinctive character.