Engine Mechanical:
Detailed disassembly, assembly, inspection, and repair of engine components including cylinders, pistons, crankshaft, camshafts, valves, and timing systems.
Engine Management:
Ignition system, fuel injection system (EFI), sensors, actuators, ECM diagnostics, and troubleshooting.
Transmission Drivetrain:
Clutch operation, gear shifting mechanisms, transmission case, primary drive, and final drive (belt drive) inspection and service.
Electrical Diagnostics:
Wiring diagrams, component testing, battery, charging system (stator, regulator/rectifier), starting system, lighting, and instrument panel.
Braking System:
Brake caliper, master cylinder, brake lines, brake pads, rotors, and ABS system (if applicable) inspection, repair, and bleeding procedures.
Suspension Steering:
Front fork (telescopic) disassembly, service, and adjustment; rear shock absorber replacement and adjustment; steering head bearing service.
Fuel System Components:
Fuel tank, fuel pump, fuel filter, fuel injectors, and throttle body service.
Exhaust And Emissions:
Exhaust system components, catalytic converter (if present), and emissions control systems.
Chassis And Body:
Frame inspection, body panel removal/installation, seat service, and fairing components.
Wheels And Bearings:
Wheel removal/installation, tire mounting/balancing, and wheel bearing service.
Preventive Maintenance:
Oil changes, filter replacements, spark plug service, lubrication, and general inspection checklists.
Component Rebuild:
Complete instructions for engine, transmission, and carburetor (if applicable) rebuilds.
Diagnostic Troubleshooting:
Systematic approaches to identifying and resolving mechanical and electrical issues.
Adjustments:
Clutch adjustment, throttle cable adjustment, idle speed adjustment, and suspension adjustments.
Torque Specifications:
Comprehensive list of torque values for all critical fasteners.
Wiring Diagrams:
Detailed and annotated electrical schematics for all circuits.
Special Tool Requirements:
Identification of Harley-Davidson specific tools needed for repairs.
Depth:
Comprehensive, covering routine maintenance to complete engine and transmission overhauls.
Diagnostics:
In-depth diagnostic procedures for electrical and mechanical systems, including troubleshooting trees.
Special Procedures:
Covers specialized procedures such as electronic diagnostics, timing adjustments, and performance tuning considerations.
Engine Family:
Harley-Davidson Twin Cam 103
Engine Type:
Air-cooled, V-twin
Displacement:
1690 cc (103 cubic inches)
Bore X Stroke:
3.875 in. x 4.38 in. (98.4 mm x 111.3 mm)
Horsepower:
Approximately 77 HP (varies slightly by year and tune)
Torque:
Approximately 99.9 ft-lbs @ 3,000 RPM (varies slightly by year and tune)
Fuel Delivery:
Electronic Sequential Port Fuel Injection (ESPFI)
Fuel Type:
Unleaded gasoline, minimum 91 octane
Instrumentation:
Analog speedometer with integrated tachometer, digital odometer, fuel gauge, and gear indicator.
Audio System:
No factory-integrated audio system on standard FXDL model; aftermarket options available.
ABS:
Optional Dual-Channel ABS available on select 2015 models.
Smartphone Integration:
Not standard; requires aftermarket solutions.
Headlight Type:
Halogen sealed beam unit.
Taillight Type:
LED with integrated stop/tail light functions.
First Service:
1000 miles (1600 km) or 6 months.
Subsequent Service:
Every 5000 miles (8000 km) or 12 months thereafter.
Engine Oil:
Harley-Davidson Genuine V-Twin 20W-50 or equivalent API SG or higher synthetic oil.
Engine Oil Capacity:
3.7 US quarts (3.5 L) with filter change.
Transmission Oil:
Harley-Davidson Genuine Formula + or Syn3 (for primary and transmission).
Transmission Oil Capacity:
2.8 US quarts (2.6 L) for primary drivetrain.
Primary Chain Case Oil:
Harley-Davidson Genuine Formula + or Syn3.
Brake Fluid:
DOT 4 HD premium fluid.
Common Wear Items:
Clutch plates, brake pads, tires, belt drive.
Potential Electrical:
Voltage regulator and stator failures can occur over time.
Engine Vibrations:
Characteristic of V-twin engines, can be mitigated with proper maintenance and balance.
Brand Establishment:
Harley-Davidson Motor Company founded in 1903.
Dyna Series Origin:
The Dyna platform was introduced in 1991, evolving from earlier Sportster and Big Twin designs.
Low Rider Concept:
The Low Rider model, originating in the late 1970s, emphasizes a lower seat height and rider ergonomics.
Twin Cam Era:
The Twin Cam engine was introduced in 1999 and became the primary engine for most Harley-Davidson models through 2017.
2015 Model Year Context:
The 2015 model year represents a refinement of the Dyna platform with the Twin Cam 103 engine.
