🏷️ Basic Information

Make:

Harley-Davidson

Model:

Dyna FXDB Street Bob

Year:

2015

Vin Prefix:

1HD1

Model Generation:

Dyna Platform

👋 Introduction

Model Segment:

Cruiser Motorcycle

Target Audience:

Enthusiast riders and independent mechanics seeking to maintain and repair their Dyna FXDB Street Bob.

Competitors:

Other cruiser motorcycles from brands like Indian, Victory, and custom builds.

Motorcycle Style:

Bobber-style cruiser with a minimalist aesthetic, low-profile seat, and stripped-down appearance.

Engine Type:

Air-cooled, Twin Cam 103™ V-Twin engine.

Drivetrain:

Belt drive, 6-speed Cruise Drive transmission.

📋 Manual Details

Primary Coverage:

Service, Maintenance, and Repair

Secondary Coverage:

Troubleshooting, Diagnostics, Specifications

Estimated Page Count:

Approximately 600-800 pages (typical for comprehensive service manuals)

Type:

Service Manual / Repair Manual

Language:

English

Format:

Digital (likely PDF)

📖 Manual Coverage

Engine:

Detailed internal and external engine components, disassembly, assembly, inspection, and adjustment of the Twin Cam 103 engine.

Fuel System:

EFI system, fuel pump, injectors, throttle body, fuel lines, and pressure testing.

Ignition System:

Ignition module, spark plugs, coils, and troubleshooting.

Transmission Drivetrain:

5-speed Cruise Drive transmission, primary drive, clutch, final drive belt, and related components.

Brakes:

Front and rear brake systems, calipers, master cylinders, brake lines, pads, rotors, and bleeding procedures.

Suspension:

Front forks (including disassembly and seal replacement), rear shock absorbers, and adjustments.

Electrical System:

Wiring diagrams, battery, charging system (stator, regulator/rectifier), starting system, lighting, gauges, and accessories.

Frame Bodywork:

Frame inspection, body panel removal/installation, fenders, fuel tank, seat, handlebars, and controls.

Wheels Tires:

Wheel removal/installation, bearing maintenance, tire inspection, and replacement.

Diagnostics:

Troubleshooting guides for common issues, diagnostic codes (if applicable to the model year and manual).

Routine Maintenance:

Oil changes, filter replacements, spark plug replacement, air filter service, lubrication points, and chain/belt adjustment.

Engine Repair:

Top-end rebuilds (cylinder head, pistons), bottom-end repairs, valve adjustments, and timing procedures.

Transmission Repair:

Clutch service, gear inspection, bearing replacement, and seal repairs.

Brake Service:

Brake pad replacement, caliper overhaul, master cylinder service, and fluid flush.

Electrical Diagnostics Repair:

Troubleshooting electrical faults, component testing, wiring harness repair, and battery/charging system diagnosis.

Suspension Fork Service:

Front fork fluid replacement, seal replacement, and fork spring adjustments.

Bodywork Cosmetic Repair:

Panel removal, installation, and minor cosmetic adjustments.

Depth Level:

Comprehensive, from basic maintenance to advanced engine and transmission rebuilds.

Diagnostic Capability:

Detailed troubleshooting charts and procedures for identifying and resolving mechanical and electrical issues.

Technical Illustrations:

Includes exploded views, diagrams, and step-by-step illustrations to clarify repair procedures.

📊 Manual Specifications

Digital Format:

PDF

Searchability:

Text-searchable PDF for quick information retrieval.

Print Readability:

High-resolution digital format suitable for printing individual pages or the entire manual.

Binding Recommendation:

For printed versions, a durable comb or spiral binding is recommended for lay-flat usability in a workshop environment.

Paper Recommendation:

For printed versions, laminated or heavy-stock paper is advisable for workshop conditions.

⚙️ Engine Specifications

Engine Family:

Twin Cam 103™

Engine Type:

Air-cooled V-Twin

Displacement:

103 cu in (1690 cc)

Bore X Stroke:

3.875 in x 4.38 in (98.4 mm x 111.3 mm)

Compression Ratio:

9.0:1

Horsepower:

Estimated ~75-80 HP at the crank (specific figures vary by tuning and testing conditions)

Torque:

Estimated ~98-100 ft-lbs at the crank (specific figures vary by tuning and testing conditions)

Fuel Delivery:

Electronic Sequential Port Fuel Injection (ESPFI)

Fuel Type:

Premium Unleaded Gasoline (91 octane or higher recommended)

🔧 Transmission

Transmission Type:

6-speed Cruise Drive

Primary Drive:

Plated, heavy-duty, internal chain

Final Drive:

Belt, 24000 psi

Gear Ratios:

1st: 9.315, 2nd: 6.652, 3rd: 4.949, 4th: 3.854, 5th: 3.214, 6th: 2.790 (Approximate, may vary slightly)

Clutch Type:

Clutched, multi-plate, wet, 1690 cc

📐 Dimensions

Length:

90.4 in (2296 mm)

Width:

35.6 in (904 mm)

Height:

46.5 in (1181 mm)

Wheelbase:

64.2 in (1630 mm)

Ground Clearance:

4.7 in (119 mm)

Seat Height:

25.5 in (648 mm) - Laden

Dry Weight:

636 lbs (288 kg)

Gross Vehicle Weight Rating Gvwr:

Not explicitly stated, but typical for this class is around 1000 lbs (454 kg)

Fuel Capacity:

5.0 gal (18.9 L)

🛡️ Safety Features

Crash Test Ratings:

Motorcycles are not typically subjected to standardized crash test ratings like passenger cars.

Braking System:

Dual-action, front and rear disc brakes, potentially with ABS as an optional feature for 2015 models.

Lighting:

Halogen headlight, LED tail light, amber incandescent turn signals.

Chassis Design:

Steel frame and swingarm for robust construction.

💡 Technology Features

Audio System:

Base models typically do not feature an integrated audio system; aftermarket solutions are common.

Gauges:

Analog speedometer with integrated digital display for odometer, trip meter, and clock. Tachometer is often an optional accessory or integrated into the main gauge assembly.

ABS:

Anti-lock Braking System (ABS) was often an optional feature on the 2015 FXDB.

Bluetooth Capability:

Not standard. Aftermarket solutions or integrations with accessory audio systems required.

🔧 Maintenance

First Service:

Typically at 1,000 miles (1,600 km) - includes engine oil and filter change, primary chaincase oil change, clutch adjustment, inspection of all fasteners, and throttle/idle cable adjustments.

Subsequent Services:

Every 5,000 miles (8,000 km) or annually, whichever comes first. This includes engine oil and filter, primary chaincase oil, inspection of brakes, tires, belts, and all critical fasteners.

Spark Plug Replacement:

Recommended every 10,000-15,000 miles (16,000-24,000 km) or as per manual specifications.

Air Filter Service:

Inspect every 5,000 miles (8,000 km), clean or replace as needed.

Engine Oil Type:

Harley-Davidson SYN3 Synthetic (or equivalent SAE 20W-50 motorcycle oil meeting Harley-Davidson specifications).

Engine Oil Capacity:

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

Primary Chaincase Oil Type:

Harley-Davidson Formula + (or equivalent SAE 80W-90 hypoid gear oil).

Primary Chaincase Oil Capacity:

Approximately 1.0 US quart (0.95 L).

Transmission Oil Type:

Harley-Davidson Formula + (or equivalent SAE 80W-90 hypoid gear oil).

Transmission Oil Capacity:

Approximately 20 oz (0.59 L).

Brake Fluid Type:

DOT 4 (for models without ABS), DOT 5.1 (for models with ABS, check specific manual).

Common Wear Items:

Clutch plates, brake pads, wheel bearings, fork seals, drive belt.

Potential Electrical Concerns:

Battery charging issues (stator, regulator/rectifier), wiring harness chafing in specific areas.

Engine Performance Notes:

Twin Cam 103 engines are generally reliable; potential concerns include oil leaks from base gasket or rocker boxes, and occasional cam chain tensioner wear (later models addressed this with hydraulic tensioners).

Suspension Performance:

Stock suspension can be considered basic; upgrades are common for improved comfort and handling.

📚 Vehicle History

Brand Foundation:

Harley-Davidson, founded in 1903, is an iconic American motorcycle manufacturer.

Dyna Platform Introduction:

The Dyna platform was introduced in 1991, evolving over the years with various engine and chassis updates.

Street Bob Introduction:

The Street Bob concept (often a stripped-down Big Twin) has been a recurring theme in Harley-Davidson's lineup, with the FXDB designation becoming prominent.

Manufacturing Location:

Typically assembled in York, Pennsylvania, USA, and Milwaukee, Wisconsin, USA.

Model Year Significance:

The 2015 model year featured the Twin Cam 103 engine and the 6-speed Cruise Drive transmission as standard across most Dyna models.

🏆 Awards & Recognition

Model Awards:

Specific awards for the FXDB Street Bob model are less common; the Harley-Davidson brand and the Dyna platform itself are widely recognized within the motorcycle industry for their styling, performance, and customization potential.

Owner Satisfaction:

Harley-Davidson generally enjoys high owner satisfaction, particularly for its iconic styling and brand loyalty.