🏷️ Basic Information

Make:

Harley-Davidson

Model:

Softail FLSTSB

Model Variant:

Fat Boy Lo

Model Year:

2010

Chassis Code:

FLSTSB

👋 Introduction

Positioning:

The Harley-Davidson Softail FLSTSB Fat Boy Lo 2010 is a cruiser known for its retro styling, comfortable ride, and iconic Fat Boy design cues, appealing to riders seeking classic aesthetics with modern performance.

Competitors:

Competes with other large-displacement cruiser motorcycles from brands like Indian Motorcycles, Victory Motorcycles, and certain models from Japanese manufacturers offering similar classic styling and V-twin engine configurations.

Design Elements:

Distinctive Fat Boy styling, including the FL-style front end, wide fork, chrome teardrop headlight, solid aluminum disc wheels, and a low-slung profile.

Powertrain:

Harley-Davidson's reliable Twin Cam 96 engine, paired with the smooth-shifting 6-speed Cruise Drive transmission.

Ergonomics:

Comfortable riding position with forward foot controls and a low seat height, suitable for long-distance cruising.

Value Proposition:

An indispensable resource for owners and technicians seeking to perform maintenance, repairs, and diagnostics on the FLSTSB Fat Boy Lo, ensuring optimal performance and longevity.

📋 Manual Details

Engine Mechanical:

Yes

Engine Electrical:

Yes

Transmission Mechanical:

Yes

Transmission Electrical:

Yes

Chassis Components:

Yes

Suspension:

Yes

Brakes:

Yes

Fuel System:

Yes

Exhaust System:

Yes

Electrical System:

Yes

Ignition System:

Yes

Lighting System:

Yes

Instruments And Gauges:

Yes

Bodywork And Fittings:

Yes

Troubleshooting:

Yes

Diagnostics:

Yes

Wiring Diagrams:

Yes

Total Pages:

752

Type:

Workshop Service Manual

Language:

English

Format:

PDF

📖 Manual Coverage

Powertrain:

Complete coverage of Twin Cam 96 engine and 6-speed Cruise Drive transmission.

Braking System:

Detailed procedures for front and rear brake system maintenance, including caliper service, fluid replacement, and ABS component checks (if equipped).

Electrical System:

Comprehensive coverage of the motorcycle's electrical system, including battery, charging system, ignition, lighting, and all accessory circuits with detailed wiring diagrams.

Fuel And Emission Control:

Includes procedures for fuel tank, fuel pump, fuel injectors, throttle body, and emissions control systems (e.g., evaporative emission control).

Suspension And Steering:

Covers front fork (e.g., telescopic) and rear shock absorber maintenance, adjustments, and seal replacement, as well as steering head bearing service.

Frame And Body:

Details on frame inspection, disassembly and reassembly of body panels, fenders, fuel tank, and seat assembly.

Routine Maintenance:

Oil changes, filter replacements, spark plug replacement, belt inspection and adjustment, brake pad inspection, and tire pressure checks.

Major Engine Overhaul:

Complete engine disassembly, inspection, assembly, including piston, cylinder, crankshaft, camshaft, and valve train procedures.

Transmission Rebuild:

Detailed steps for transmission disassembly, inspection of gears, bearings, and shift drum, and reassembly.

Electrical Troubleshooting:

Systematic diagnostic procedures for electrical faults, including component testing and troubleshooting common electrical issues using wiring diagrams.

Suspension Calibration:

Instructions for adjusting suspension sag, damping, and rebuilding front forks and rear shocks.

Brake System Service:

Bleeding procedures, replacement of brake pads, rotors, and brake lines.

Fuel System Diagnosis:

Cleaning fuel injectors, testing fuel pressure, and diagnosing fuel delivery problems.

Depth:

Comprehensive from basic maintenance to complete engine and transmission rebuilds, including detailed diagnostic procedures and specifications.

📊 Manual Specifications

File Type:

Digital (PDF)

Quality:

High-resolution, ensuring clarity of text and diagrams.

Binding:

Not Applicable (Digital Download)

Type:

Not Applicable (Digital Download)

⚙️ Engine Specifications

Engine Type:

Air-cooled, Twin Cam 96 V-Twin

Displacement:

96 cu in (1584 cc)

Bore X Stroke:

3.75 in x 4.38 in (95.25 mm x 111.25 mm)

Compression Ratio:

9.2:1

Valve Train:

Pushrod-actuated, overhead valves with two valves per cylinder

Torque Rating:

92.6 ft-lbs (125.5 Nm) @ 3500 rpm (typical specification for Twin Cam 96)

Horsepower Rating:

Not explicitly stated in product info, but typically around 70-75 HP for this engine.

Fuel Delivery:

Electronic Sequential Port Fuel Injection (ESPFI)

Fuel Type:

Unleaded gasoline, minimum 91 octane (R+M)/2

Ignition System:

High-performance, electronic ignition with knock sensor

Oil Type:

Harley-Davidson SAE 20W-50 engine oil or equivalent.

Oil Capacity:

Approximately 3.5 quarts (3.3 liters) with filter change.

🔧 Transmission

Transmission Type:

6-speed Cruise Drive

Gear Ratios:

1st: 9.311, 2nd: 6.454, 3rd: 4.793, 4th: 3.853, 5th: 3.285, 6th: 2.790 (Typical for this transmission)

Primary Drive:

Gear, 34/46 ratio

Final Drive:

Belt, 32/66 ratio

Clutch Type:

Hydraulic, multi-plate wet clutch

Transmission Oil Type:

Harley-Davidson Formula + transmission lubricant (SAE 50) or equivalent.

Transmission Oil Capacity:

Approximately 1.0 quart (0.95 liters)

📐 Dimensions

Length:

96.3 in (2446 mm)

Width Handlebar:

36.6 in (930 mm)

Height:

46.3 in (1176 mm)

Seat Height Laden:

24.2 in (615 mm)

Ground Clearance:

4.7 in (119 mm)

Rake:

31.5 degrees

Trail:

4.4 in (112 mm)

Dry Weight:

651 lbs (295 kg)

Wet Weight:

Approx. 690 lbs (313 kg) with fluids

Gross Vehicle Weight Rating:

Not specified, but generally around 1160 lbs (526 kg)

Luggage Capacity:

N/A (Accessory luggage required)

🛡️ Safety Features

Crash Test Ratings:

Motorcycles are generally not subject to standardized crash test ratings like automobiles. Safety is evaluated based on design and component integrity.

Braking System:

Standard hydraulic disc brakes front and rear. ABS (Anti-lock Braking System) was often an optional feature for this model and year, which should be verified for specific units.

Lighting:

Halogen headlight, LED tail light and stop light for increased visibility.

Frame Construction:

Steel frame and swingarm designed for stability and rider comfort.

Wheel Type:

Solid aluminum disc wheels contribute to stability and styling.

💡 Technology Features

Audio System:

Base models typically do not come with a factory-installed audio system. Accessory audio systems are commonly fitted by owners.

Display:

Analog speedometer, tachometer, and indicator lights. A digital odometer and gear indicator are usually integrated into the instrument cluster.

ABS:

Anti-lock Braking System (ABS) was an optional feature for the 2010 FLSTSB. The manual will detail its operation and service if equipped.

Bluetooth:

Not standard. Bluetooth integration is typically achieved through aftermarket accessories or communication systems.

Headlight Type:

Large, 7-inch halogen headlight with a distinctive chrome bucket and associated mounting.

Taillight Type:

LED tail light and stop light assembly for enhanced visibility and longevity.

🔧 Maintenance

First Service:

1000 miles (1600 km) or 6 months, whichever comes first. Includes engine oil and filter change, inspection of all primary systems, and adjustments.

Subsequent Service:

Every 5000 miles (8000 km) or 12 months, whichever comes first. Involves engine oil and filter change, belt inspection/adjustment, brake inspection, and comprehensive checks.

Spark Plug Replacement:

Typically recommended every 10,000-15,000 miles (16,000-24,000 km), depending on usage and plug type.

Drive Belt Adjustment:

Check and adjust tension every 5000 miles (8000 km). Specific tension values are detailed in the manual.

Engine Oil:

Harley-Davidson SAE 20W-50, HD-360, or equivalent meeting Harley-Davidson specifications.

Transmission Oil:

Harley-Davidson Formula + Transmission Lubricant (SAE 50) or equivalent.

Primary Chain Case Oil:

Harley-Davidson Formula + Transmission Lubricant (SAE 50) or equivalent.

Brake Fluid:

DOT 4, HD-4 or equivalent premium quality brake fluid.

Common Wear Items:

Drive belt wear, brake pad wear, exhaust pipe mounting hardware (can loosen), and potential for oil leaks from primary cover or engine seals over time.

Electrical Gremlins:

Can sometimes manifest as intermittent issues with lighting or accessories, often related to loose connections or grounding points, thoroughly covered in the diagnostic section.

Suspension Tuning:

While generally reliable, some riders may seek aftermarket suspension upgrades or tuning for personalized ride characteristics.

📚 Vehicle History

Heritage:

Harley-Davidson boasts a rich history dating back to 1903, renowned for its V-twin engines, cruiser motorcycles, and a distinct American cultural identity.

Softail Lineage:

The Softail platform, introduced in 1984, is known for its hidden rear suspension, mimicking the look of a rigid frame while providing modern ride comfort. The Fat Boy model, introduced in 1990, became an icon of the brand.

Flstsb Introduction:

The FLSTSB (Fat Boy Lo) was introduced for the 2010 model year, differentiating itself with a lower seat height, a satin chrome finish on many components, and a more streamlined look compared to other Fat Boy models.

Manufacturing Location:

United States (various Harley-Davidson assembly plants)

🏆 Awards & Recognition

Model Acclaim:

While specific awards for the 2010 FLSTSB Fat Boy Lo are not readily available, the Fat Boy model line has consistently received positive reviews for its iconic styling, comfortable ride, and enduring appeal in the cruiser market. Harley-Davidson models are often recognized for their build quality and rider experience.

Owner Satisfaction:

Harley-Davidson motorcycles generally score highly in owner satisfaction surveys due to brand loyalty, lifestyle association, and the riding experience they offer.