🏷️ Basic Information

Make:

Harley-Davidson

Model:

FXSB Low Rider

Year:

1985

👋 Introduction

Market Position:

The 1985 FXSB Low Rider represented a key evolutionary step for Harley-Davidson, bridging the gap between the venerable Shovelhead engine and the forthcoming Evolution engine, appealing to riders seeking classic styling with improved performance and reliability. This manual is essential for owners and independent mechanics.

Competitive Analysis:

In 1985, the FXSB competed in the cruiser market against models from brands like Honda, Yamaha, and Kawasaki, but its iconic Harley-Davidson styling and V-twin rumble set it apart. This manual provides the specific, detailed information needed to maintain and repair this unique American motorcycle.

Key Features:

Features characteristic 'Low Rider' styling with a lower seat height and pullback handlebars. This particular model year often featured the transition engine, incorporating elements that paved the way for the Evolution V-twin. The manual captures the nuances of this specific model year's components and assembly.

📋 Manual Details

Coverage Areas:

Complete service, repair, and maintenance procedures for the 1985 Harley-Davidson FXSB Low Rider.

Page Count:

Estimated 500-700 pages (typical for comprehensive factory service manuals of this era).

Manual Type:

Workshop Service Repair Manual

Language:

English

Format:

Downloadable Digital Format (likely PDF)

📖 Manual Coverage

Systems Covered:

Engine (Shovelhead/Evolution transition), transmission, drivetrain, chassis, suspension, brakes, electrical system, fuel system, exhaust system, cooling system (air-cooled), bodywork, and specialized tools.

Procedures Included:

Routine maintenance, troubleshooting, diagnostic procedures, component removal and installation, engine overhaul, transmission rebuild, electrical system diagnosis and repair, brake system servicing, suspension adjustments, and chassis maintenance.

Technical Depth:

Comprehensive, covering from basic scheduled maintenance to in-depth mechanical and electrical repairs, including full engine and transmission rebuilds. Includes torque specifications, clearances, wiring diagrams, and diagnostic flowcharts.

📊 Manual Specifications

File Format:

Searchable PDF, high-resolution scans for clear diagrams and text.

Print Quality:

High-resolution for optimal viewing of diagrams, schematics, and component illustrations.

Binding Type:

N/A (Digital Download)

Paper Type:

N/A (Digital Download)

⚙️ Engine Specifications

Primary Engine:

Harley-Davidson Shovelhead Engine (likely a late iteration or transitioning to early Evolution components for some models, but 1985 is predominantly Shovelhead for FXSB).

Displacement:

1339 cc (82 cubic inches)

Bore X Stroke:

3.4375 in x 4.25 in (87.31 mm x 107.95 mm)

Compression Ratio:

Approximately 8.0:1 (varies slightly by specific Shovelhead variant)

Horsepower:

Estimated 60-65 HP (at crankshaft, typical for Shovelhead) - manual will provide exact figures.

Torque:

Estimated 70-75 ft-lbs (at crankshaft, typical for Shovelhead) - manual will provide exact figures.

Cylinder Configuration:

V-twin, 45-degree cylinder angle

Valve Train:

Overhead Valve (OHV), Pushrod actuated

Fuel System:

Carburetor (likely a Keihin CV or Linkert style, manual will specify model and settings).

Ignition System:

Electronic Ignition with points or solid-state ignition modules depending on exact build date/spec.

Oil System:

Dry Sump with oil tank, oil pump driven by camshaft.

Cooling System:

Air-cooled

🔧 Transmission

Standard:

4-speed Manual Transmission

Optional:

N/A for this model year.

Features:

Constant mesh, left-foot shift, chain drive final drive.

Gear Ratios:

Manual will provide specific gear ratios for each of the 4 speeds.

Clutch Type:

Wet, multi-plate, diaphragm spring clutch.

Transmission Fluid:

Harley-Davidson Genuine V-Twin Transmission Fluid or equivalent (e.g., Spectro, Bel-Ray) - manual will specify API GL-1 or GL-2.

📐 Dimensions

Exterior Length:

Approximately 91.7 inches (2330 mm).

Exterior Width:

Approximately 34.6 inches (879 mm).

Exterior Height:

Approximately 45.9 inches (1166 mm).

Wheelbase:

Approximately 63.5 inches (1613 mm).

Ground Clearance:

Approximately 4.7 inches (119 mm).

Seat Height Laden:

Approximately 26.5 inches (673 mm) - designed for low rider comfort.

Dry Weight:

Approximately 565 lbs (256 kg).

Fuel Capacity:

3.6 US gallons (13.6 liters).

Oil Capacity:

Approximately 4 US quarts (3.8 liters) with filter change.

Tire Size Front:

3.50H-19 or similar bias-ply.

Tire Size Rear:

130/90B16 or similar bias-ply.

Wheel Type:

Spoked wheels, typically with cast aluminum hubs.

Wheel Bolt Pattern:

N/A (Harley-Davidson uses bolt-on hubs, not a traditional bolt pattern for wheels).

🛡️ Safety Features

Ratings:

Motorcycle safety is primarily rider-dependent. This manual will cover safety precautions for servicing and operation.

Active Features:

Dual front disc brakes, single rear disc brake, responsive throttle control.

Passive Features:

Sturdy frame construction, effective lighting systems (headlight, tail light, turn signals), vibration damping through rubber mounts.

Braking System Front:

Dual 11.5-inch (292 mm) discs with dual-piston calipers.

Braking System Rear:

Single 11.5-inch (292 mm) disc with dual-piston caliper.

Brake Fluid Type:

DOT 4 Hydraulic Brake Fluid (manual will specify exact type and replacement intervals).

Service Safety Precautions:

Proper handling of fuel, battery acid, hot engine components, and use of safety equipment (gloves, eye protection) will be detailed in the manual.

💡 Technology Features

Infotainment:

Basic; features analog gauges for speedometer, tachometer (if equipped), and indicator lights. No modern infotainment or connectivity features.

Driver Assistance:

None.

Connectivity:

None.

Electrical System Complexity:

Relatively straightforward 12-volt system, but detailed wiring diagrams in the manual are essential for any electrical work.

🔧 Maintenance

Service Intervals:

Typical intervals include: 1,000 miles (oil change, primary chain adjustment), 5,000 miles (spark plugs, air filter, transmission fluid check), 10,000 miles (rear drive belt inspection/adjustment, brake fluid flush) - manual will provide detailed, precise schedule.

Fluid Specifications:

Engine Oil: Harley-Davidson Genuine V-Twin Motor Oil SAE 20W50 or equivalent. Transmission Fluid: HD V-Twin Transmission Fluid (GL-1/GL-2). Primary Chaincase Fluid: HD Primary Chaincase Lubricant or equivalent (often shared with transmission or separate specific formulation). Brake Fluid: DOT 4.

Engine Oil Capacity:

4 US quarts (3.8 liters) with filter change.

Primary Chain Tension:

Specific deflection measurement (e.g., 1/2 to 3/4 inch) will be provided in the manual.

Carburetor Cleaning And Adjustment:

Essential for optimal performance and fuel economy. Manual details procedures for removal, cleaning, reassembly, and jetting/mixture adjustments.

Belt Drive Inspection:

Regular inspection for wear, tension, and alignment is critical for the final drive belt.

Known Issues:

Shovelhead engines can experience oil leaks, valve guide wear, and occasional ignition system gremlins. The manual addresses troubleshooting these common issues specific to the 1985 model.

Battery Maintenance:

Proper battery charging and terminal cleaning are crucial for the electrical system's reliability.

Tire Pressure:

Recommended pressures for front and rear tires (e.g., 30-36 PSI) will be specified in the manual.

📚 Vehicle History

Brand Heritage:

Harley-Davidson, founded in 1903, boasts a rich heritage of American motorcycle manufacturing, synonymous with power, freedom, and iconic styling. The Shovelhead era is a significant chapter in this history.

Model Evolution:

The FXSB Low Rider was introduced in 1980 as part of Harley-Davidson's 'big twin' lineup, aimed at offering a more accessible and comfortable riding experience with its lower seat height and custom styling. It evolved through various Shovelhead iterations before the transition to the Evolution engine.

Production Years:

FXSB Low Rider produced from 1980 to 1985.

Manufacturing Location:

Milwaukee, Wisconsin, USA.

Shovellhead To Evolution Transition:

1984 marked the introduction of the Evolution engine. While many 1984 models received the new engine, 1985 models, particularly in certain cruiser configurations like the FXSB, may still feature late-production Shovelhead engines or represent a period of overlap, making this manual crucial for identifying specific components.

🏆 Awards & Recognition

Recognitions:

The Harley-Davidson FXSB Low Rider, as part of the FX series, is an icon of American motorcycle design and performance, consistently recognized for its style and heritage.

Ratings:

While specific consumer ratings for this vintage model are scarce, its enduring appeal and collector status speak to its quality and desirability.