🏷️ Basic Information

Make:

Harley-Davidson

Model:

FLT

Sub Model:

Touring

Year:

1999

Engine Code:

Twin Cam 88, Twin Cam 88B (Vibration Isolated), Twin Cam 103 (Optional Upgrade)

Chassis Code:

FLT Chassis Family

👋 Introduction

Target Audience:

Harley-Davidson FLT owners, independent repair shops, and DIY enthusiasts seeking detailed service information.

Value Proposition:

Provides a cost-effective and readily accessible alternative to official Harley-Davidson service manuals, offering the same depth of technical information for DIY maintenance and repair.

Accessibility:

Instant download format allows immediate access to critical service information.

Completeness:

Covers all aspects of service, repair, and maintenance for the specified model years and engine configurations.

📋 Manual Details

Primary Coverage:

Service and Repair for Harley-Davidson FLT Twin Cam 88 and Twin Cam 103 models

Estimated Page Count:

500-700 pages (typical for comprehensive service manuals)

Manual Type:

Service and Repair Manual

Language:

English

Format:

Downloadable Digital File (PDF)

📖 Manual Coverage

Engine:

Twin Cam 88, Twin Cam 103 (engine assembly, teardown, lubrication, cooling, fuel, ignition, exhaust, emissions control)

Transmission:

5-speed Cruise Drive Transmission (disassembly, assembly, inspection, adjustments, lubrication)

Drivetrain:

Primary Drive, Clutch, Belt Drive, Final Drive

Chassis:

Frame, Suspension (front fork, rear shock absorbers), Steering

Brakes:

Front and Rear Hydraulic Brake Systems (disassembly, service, fluid replacement, bleeding)

Electrical:

Ignition System, Charging System (stator, regulator/rectifier), Starting System (starter motor, solenoid), Lighting, Gauges, Horn, Battery Service

Fuel System:

Carburetor (CV) Service and Adjustment, Fuel Tank, Fuel Lines

Bodywork:

Fairings, Saddlebags, Fenders, Seat, Handlebars, Control Levers, Cables

Wheels And Tires:

Wheel Bearing Service, Tire Mounting and Balancing

Maintenance:

Oil Changes, Filter Replacements, Spark Plug Service, Air Filter Cleaning/Replacement, Brake Pad Inspection/Replacement, Chain/Belt Adjustment and Lubrication

Troubleshooting:

Diagnostic procedures for common starting, running, and electrical issues

Repair:

Component disassembly, inspection, repair, and reassembly for all major systems

Engine Rebuild:

Complete engine teardown, inspection of internal components (pistons, rings, valves, crankshaft), and reassembly with specifications

Electrical Diagnostics:

Wiring diagrams, troubleshooting electrical faults using multimeters and test equipment

Suspension Service:

Fork seal replacement, rear shock absorber service/replacement, linkage inspection

Clutch Service:

Clutch plate replacement, cable adjustment

Carburetor Tuning:

Idle speed adjustment, mixture screw settings, jetting recommendations

Depth:

Comprehensive: Covers routine maintenance, in-depth troubleshooting, component-level repair, and full engine/transmission rebuilds.

📊 Manual Specifications

Digital Format:

PDF (Portable Document Format)

Print Readability:

High-resolution scans of original factory manual pages, ensuring clear diagrams and text for printing.

Binding For Print:

N/A (Digital Download)

Paper Type For Print:

N/A (Digital Download)

⚙️ Engine Specifications

Engine Type:

V-Twin, Air-Cooled, Pushrod Overhead Valves (OHV)

Engine Displacement:

88 cubic inches (1450cc)

Engine Displacement Optional:

103 cubic inches (1690cc) - often an aftermarket or dealer upgrade

Bore X Stroke 88Ci:

3.75 in. x 4.00 in. (95.25 mm x 101.6 mm)

Bore X Stroke 103Ci:

3.875 in. x 4.375 in. (98.4 mm x 111.1 mm) - typical for 103 stroker kits

Compression Ratio 88Ci:

8.8:1 (Stock)

Compression Ratio 103Ci:

9.0:1 to 9.7:1 (Common for factory 103s, varies with kit)

Horsepower 88Ci:

~65-70 HP (at crankshaft, estimated)

Torque 88Ci:

~75-80 lb-ft (at crankshaft, estimated)

Fuel Delivery:

Keihin CV Carburetor (38mm)

Fuel Type:

Unleaded Gasoline, Minimum 91 Octane Recommended

Fuel Tank Capacity:

5.0 US gallons (18.9 L)

🔧 Transmission

Transmission Type:

5-speed Manual Transmission

Gear Ratios:

1st: 9.207, 2nd: 6.770, 3rd: 5.114, 4th: 4.056, 5th: 3.404 (Approximate, may vary slightly)

Transmission Fluid:

Harley-Davidson Formula+ (or equivalent transmission lubricant meeting API GL-4 specifications, SAE 50W)

Primary Drive:

Multi-plate Clutch, Wet

Final Drive:

Belt Drive (32 Tooth Front Pulley, 65 Tooth Rear Pulley)

📐 Dimensions

Length:

Approx. 93.7 in. (2380 mm)

Width:

Approx. 35.0 in. (889 mm)

Height:

Approx. 56.5 in. (1435 mm)

Dry Weight:

Approx. 720 lbs (327 kg)

Gross Vehicle Weight Rating Gvwr:

Approx. 1260 lbs (572 kg)

Payload Capacity:

Approx. 540 lbs (245 kg)

🛡️ Safety Features

Lighting:

Halogen Headlight, Auxiliary Passing Lamps, Integrated Tail/Brake Light, Front and Rear Turn Signals

Braking System:

Dual Disc Front Brakes, Single Disc Rear Brake

Tire Specification:

Tubeless Tires: Front - MT90B16, Rear - MU85B16 (Typical)

💡 Technology Features

Audio System:

Optional factory radio/cassette player with speakers integrated into the fairing. Some models may have CB radio and intercom features.

Cruise Control:

Available as an option on some FLT models, providing enhanced touring comfort.

Gauges:

Analog speedometer, tachometer, oil pressure, voltage, and fuel level gauges.

🔧 Maintenance

First Service:

1000 miles (1600 km) or 6 months

Subsequent Oil Change:

Every 5000 miles (8000 km) or 12 months

Spark Plug Replacement:

Every 10,000 miles (16,000 km)

Belt Drive Inspection:

Inspect at every service, adjust tension as needed per manual specification.

Engine Oil:

Harley-Davidson 20W-50 SYN3 (or equivalent synthetic motorcycle oil meeting Harley-Davidson specifications)

Engine Oil Capacity:

Approx. 4.0 US quarts (3.8 L) with filter change

Primary Chain Case Oil:

Harley-Davidson Formula+ (or equivalent meeting HD spec)

Primary Chain Case Oil Capacity:

Approx. 2.6 US quarts (2.5 L)

Brake Fluid:

DOT 4 Hydraulic Fluid

Cam Chain Tensioners:

Early Twin Cam models (pre-2007) are known for wear on the cam chain tensioner shoes, potentially leading to catastrophic engine failure. This manual will provide guidance on inspection and replacement. Upgraded hydraulic tensioners are highly recommended.

Crankshaft Runout:

Improper assembly or bearing failures can lead to excessive crankshaft runout. The manual will detail specifications for checking this.

Oil Leaks:

Common leak points include primary cover gaskets, transmission seals, and rocker box gaskets. The manual provides procedures for sealing these.

📚 Vehicle History

Brand Origin:

Harley-Davidson Motor Company, founded in Milwaukee, Wisconsin, USA.

Twin Cam Introduction:

The Twin Cam engine platform was introduced in 1999, replacing the Evolution (Evo) Big Twin engine, marking a significant technological advancement for Harley-Davidson touring bikes.

Flt Platform:

The FLT chassis family has a long lineage of Harley-Davidson touring motorcycles, characterized by the frame-mounted fairing and large saddlebags.

Production Period For This Manual:

Covers 1999 models equipped with Twin Cam 88 and potentially early Twin Cam 103 configurations.

🏆 Awards & Recognition

Model Legacy:

The FLT platform with the Twin Cam engine became the benchmark for Harley-Davidson touring motorcycles for over a decade, solidifying its reputation for comfort and long-distance capability.

Manual Quality:

High utility for maintenance and repair; provides factory-level detail for technicians and enthusiasts.