🏷️ Basic Information

Make:

Harley-Davidson

Model:

FXSB Low Rider

Year:

1985

Chassis Code:

FXSB

Engine Code:

Shovelhead

👋 Introduction

Positioning:

The FXSB Low Rider was Harley-Davidson's attempt to capture a younger demographic and broaden the appeal of the cruiser segment in the mid-1980s, offering a more accessible and slightly sportier take on the classic cruiser formula.

Competitors:

Competed with Japanese cruisers like Yamaha Virago, Honda Magna, and Kawasaki Vulcan, as well as other American offerings from manufacturers like Indian (though less prevalent at this time).

Low Seat Height:

Characteristic 'Low Rider' name denotes a lower seat height compared to other big twins of the era, enhancing rider comfort and accessibility.

Shorter Wheelbase:

Often featured a slightly shorter wheelbase than other models, contributing to a more nimble feel.

Styling Elements:

Distinctive styling including stepped seats, raked-out front ends, and often custom-like handlebars.

📋 Manual Details

Coverage Description:

Comprehensive repair and service for all aspects of the 1985 Harley-Davidson FXSB Low Rider motorcycle.

Estimated Page Count:

Varies (Typical factory service manuals of this era range from 300-600 pages, this digital download is likely extensive).

Manual Type:

Factory Service Manual / Workshop Manual

Language:

English

Format:

Digital Download (PDF)

📖 Manual Coverage

Engine:

Complete engine disassembly, assembly, tuning, and troubleshooting for the Shovelhead engine.

Transmission:

4-speed constant mesh transmission service, repair, and overhaul.

Drive Train:

Primary drive system, clutch, and belt drive maintenance and repair.

Fuel System:

Carburetor (likely a Keihin Butterfly or similar) service, tuning, and overhaul; fuel tank and lines.

Ignition System:

Ignition timing, points and condenser (or early electronic ignition), coil, spark plugs, and wiring.

Electrical System:

Wiring diagrams, battery, charging system (generator/alternator), lighting, starter motor, switches, and instruments.

Brakes:

Front and rear brake system service, including hydraulic lines, master cylinders, calipers, and pads/shoes.

Suspension:

Front fork (likely 35mm or 38mm diameter) overhaul, seals, and oil; rear shock absorber replacement and adjustment.

Frame And Bodywork:

Frame inspection, minor repairs, and body component removal/installation (fenders, tank, seat, etc.).

Wheels And Tires:

Wheel bearing service, tire installation and pressure recommendations.

Scheduled Maintenance:

Oil changes, filter replacements, chain lubrication/adjustment, tune-ups.

Engine Repair:

Top-end rebuild (cylinder head, piston, rings), bottom-end service (crankshaft, connecting rods), valve adjustments.

Transmission Repair:

Gearbox disassembly, inspection, and reassembly; clutch plate replacement.

Electrical Diagnostics:

Troubleshooting electrical faults using wiring diagrams, component testing.

Carburetor Rebuilding:

Complete carburetor overhaul, including jetting adjustments and float bowl settings.

Brake Service:

Brake fluid flush, pad/shoe replacement, caliper/wheel cylinder overhaul.

Suspension Overhaul:

Fork seal replacement, fork oil change, rear shock absorber servicing.

Wiring Diagrams:

Detailed, high-quality wiring diagrams for all electrical circuits.

Depth Level:

Complete workshop level, covering everything from routine maintenance to full engine and transmission rebuilds.

Diagnostic Capabilities:

Extensive troubleshooting guides and symptom-based diagnostics.

Rebuild Procedures:

Detailed step-by-step instructions for complete component rebuilds.

📊 Manual Specifications

File Type:

PDF

Searchability:

Searchable text within the PDF for quick information retrieval.

Image Resolution:

High resolution, suitable for clear printing of diagrams and images.

Binding Type:

N/A (Digital Download)

Paper Type:

N/A (Digital Download)

⚙️ Engine Specifications

Engine Type:

Air-cooled, 45-degree V-twin

Engine Family:

Shovelhead

Displacement:

80 cubic inches (approx. 1308cc)

Bore X Stroke:

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

Compression Ratio:

Approximately 8.0:1

Horsepower:

Estimated 60-70 HP (varies by tuning and specific configuration)

Torque:

Estimated 70-80 ft-lbs (varies by tuning and specific configuration)

Carburetor Type:

Typically a Keihin Butterfly or Linkert, though aftermarket options were common.

Fuel Delivery:

Gravity feed from fuel tank

🔧 Transmission

Transmission Type:

4-speed constant mesh, foot-shifted

Primary Drive:

Multi-plate wet clutch, chain drive to transmission

Final Drive:

Belt drive

Clutch Operation:

Cable-actuated clutch

Shift Lever Configuration:

Heel-toe shifter available, but primarily foot-shifted

📐 Dimensions

Wheelbase:

Approximately 62.5 inches (1588 mm)

Seat Height:

Approximately 26.5 inches (673 mm) unladen

Dry Weight:

Approximately 530 lbs (240 kg)

Fuel Capacity:

Approximately 3.5 gallons (13.2 liters)

🛡️ Safety Features

Safety Ratings:

N/A (Motorcycles typically do not receive NHTSA safety ratings as passenger vehicles do).

Brakes:

Dual-disc front brakes, single-disc rear brake.

Lighting:

Headlight, taillight, brake light, turn signals.

Frame Construction:

Steel tube frame providing structural integrity.

Operator Interface:

Handlebars, footpegs, and controls designed for rider input.

💡 Technology Features

Infotainment System:

N/A (This era of motorcycle did not feature integrated infotainment systems).

Driver Assistance Features:

N/A (No electronic rider aids like ABS or traction control were available).

Connectivity Features:

N/A (No Bluetooth or smartphone integration).

🔧 Maintenance

Engine Oil Change:

Every 2,000-3,000 miles or annually, whichever comes first.

Transmission Oil Change:

Every 5,000-7,500 miles or annually.

Primary Chain Case Oil:

Check level regularly, change every 5,000-7,500 miles or annually.

Spark Plug Replacement:

Every 5,000-7,500 miles.

Air Filter Cleaning:

Inspect every 2,000 miles, clean/replace as needed depending on conditions.

Brake Fluid Flush:

Every 1-2 years.

Engine Oil Type:

Harley-Davidson Genuine Motor Oil (or equivalent SAE 20W50 motorcycle-specific oil).

Transmission Oil Type:

Harley-Davidson Motorcycle Transmission Lubricant (or equivalent 80W-90 gear oil).

Primary Chain Case Oil Type:

Harley-Davidson Genuine Formula+ (or equivalent primary chain case lubricant).

Brake Fluid Type:

DOT 4 hydraulic brake fluid.

Fork Oil Type:

Harley-Davidson fork oil (typically SAE 10W or 15W, consult manual for exact specification).

Shovlehead Engine Characteristics:

Known for potential oil leaks from the crankcase and pushrod tubes; requires regular attention to oil seals.

Carburetor Tuning:

Shovelhead carburetors can be finicky and require diligent tuning for optimal performance and reliability.

Electrical Reliability:

Older wiring harnesses can degrade, leading to intermittent electrical issues. Charging system components (regulator, stator) are common points of wear.

Clutch Wear:

Clutch plates can wear over time and may require replacement, especially with aggressive riding.

📚 Vehicle History

Heritage:

Harley-Davidson, founded in 1903, is one of the most iconic American motorcycle manufacturers, known for its V-twin engines and distinct cruiser styling.

Evolution Lineage:

The FXSB Low Rider is part of the FX series of Harley-Davidsons, which traditionally featured a mix of Softail (rubber-mounted engine, hidden rear suspension) and traditional frame designs. The FXSB itself was a specific evolution in the FX line, focusing on rider ergonomics and a more accessible cruiser experience.

Production Period:

The FXSB model was produced for a limited run, generally considered to be from 1983 to 1985.

Manufacturing Location:

United States (primarily York, Pennsylvania and Milwaukee, Wisconsin).

🏆 Awards & Recognition

Model Recognition:

The FXSB Low Rider is recognized within the Harley-Davidson community as a significant model that bridged the gap between traditional big twins and the evolving cruiser market, offering a more accessible entry point.

Consumer Ratings:

Highly regarded by enthusiasts for its classic Shovelhead power and unique styling, though maintenance demands are higher than modern machines.