Model Segment:
Full-size cruiser motorcycle, characterized by comfortable touring capability and classic styling.
Target Audience:
Riders seeking a comfortable, reliable, and iconic American motorcycle for long-distance touring and everyday riding.
Key Competitors:
Models from other American manufacturers like Indian Motorcycles, as well as some Japanese manufacturers offering large-displacement cruisers with touring features.
Distinctive Features:
Detachable windscreen, large comfortable seat, ample luggage capacity (saddlebags), robust V-twin engine, classic styling, highway cruising comfort.
Manual Value Proposition:
Provides essential, factory-accurate information for maintaining, troubleshooting, and repairing the FLHR Road King, empowering owners and technicians to keep the motorcycle in optimal condition.
Engine:
V-Twin Evolution Engine, including top-end (cylinder heads, valves, camshafts), bottom-end (crankshaft, connecting rods, pistons), oiling system, lubrication, cooling (air-cooled).
Fuel System:
Carburetion (likely Keihin CV carburetor), fuel tank, fuel lines, fuel pump (if applicable for the era's models).
Ignition System:
Electronic ignition system, ignition coil, spark plugs, timing.
Transmission:
5-speed Cruise Drive transmission, clutch operation, gear shifting mechanisms, primary drive system (chain or belt), secondary drive (belt drive), transmission oil.
Brakes:
Hydraulic disc brakes (front and rear), brake calipers, master cylinders, brake lines, brake fluid specifications, bleeding procedures.
Electrical System:
Battery, charging system (stator, voltage regulator/rectifier), starter motor, lighting (headlight, taillight, turn signals, brake lights), wiring diagrams, fuses, relays, switches, diagnostic codes.
Suspension:
Front telescopic forks (likely Showa or Marzocchi components), rear shock absorbers, fork oil specifications, rear suspension adjustments.
Steering And Handling:
Handlebars, steering bearings, front fork alignment, wheel alignment.
Frame And Bodywork:
Frame inspection, body panel removal and installation, fenders, fuel tank mounting, seat assembly, fairing (if applicable), saddlebags.
Wheels And Tires:
Wheel bearing maintenance, tire inspection and replacement, tire pressures, wheel balancing.
Accessories And Comfort:
Windshield mounting, passenger comfort features, luggage systems.
Routine Maintenance:
Oil changes, filter replacement, spark plug checks, chain/belt adjustment, brake fluid checks, tire pressure checks.
Troubleshooting:
Diagnostic procedures for common issues related to engine, electrical, fuel, and drivetrain systems.
Engine Overhaul:
Detailed instructions for engine disassembly, inspection, repair, and reassembly, including piston ring replacement, valve adjustments, and bearing checks.
Transmission Repair:
Clutch adjustment and replacement, transmission gear inspection and replacement, bearing servicing.
Brake System Service:
Brake pad replacement, caliper service, master cylinder overhaul, line replacement, bleeding procedures.
Electrical Diagnostics:
Wiring harness troubleshooting, component testing (stator, regulator, ignition module), battery and charging system analysis.
Suspension Service:
Fork seal replacement, fork oil changes, rear shock absorber servicing.
Carburetor Rebuild:
Disassembly, cleaning, adjustment, and reassembly of the CV carburetor.
Timing Adjustment:
Procedures for setting engine ignition timing.
Bodywork Repair:
Guidance on removing and refitting body panels, fenders, and other cosmetic components.
Depth Level:
Comprehensive factory-level technical detail, suitable for professional technicians and experienced DIY mechanics.
Diagnostic Capabilities:
In-depth diagnostic trees and troubleshooting flowcharts for identifying root causes of mechanical and electrical faults.
Rebuild Procedures:
Detailed instructions and specifications for complete engine and transmission rebuilds.
Special Tools:
Identification and usage instructions for specialized Harley-Davidson tools required for specific repair procedures.
Torque Specifications:
Precise torque values for all critical fasteners and components.
Clearances And Tolerances:
Specifications for critical engine and transmission clearances (e.g., piston-to-cylinder wall, bearing clearances, valve lash).
Engine Type:
Air-cooled, Evolution V-twin
Displacement:
1337.8 cc (81.5 cubic inches)
Bore X Stroke:
3.49 in x 4.25 in (88.9 mm x 107.95 mm)
Compression Ratio:
Typically 8.2:1 to 8.3:1 for Evolution engines of this era.
Horsepower:
Approximately 60-65 HP (at crankshaft, depending on specific tuning and year).
Torque:
Approximately 70-76 ft-lbs (at crankshaft, depending on specific tuning and year).
Carburetor Type:
Keihin CV (Constant Velocity) 40 mm carburetor.
Fuel Type:
Unleaded gasoline, minimum octane rating of 91 (recommended).
Oil Capacity:
Approximately 4 quarts (3.8 liters) with filter change.
Oil Type:
Harley-Davidson Syn3 or a premium multi-viscosity motorcycle oil meeting Harley-Davidson specifications (e.g., 20W50).
Initial Service:
Typically 1,000 miles (1600 km) for initial break-in service (oil change, filter change, primary check).
Routine Oil Change:
Every 2,500 - 5,000 miles (4000 - 8000 km) or annually, depending on usage and oil type. Consult manual for specifics.
Belt Tension Check:
Check every 2,500 miles (4000 km).
Brake Fluid Change:
Every 1-2 years or as recommended by mileage.
Spark Plug Replacement:
Recommended at 10,000 - 15,000 miles (16,000 - 24,000 km).
Engine Oil:
Harley-Davidson Syn3 or equivalent 20W50 motorcycle oil.
Transmission Fluid:
Harley-Davidson transmission fluid or SAE 80W-90 gear oil.
Primary Chaincase Lubricant:
Harley-Davidson primary lubricant or equivalent SAE 90 gear oil.
Brake Fluid:
DOT 4 hydraulic brake fluid.
Evolution Engine Considerations:
Potential for oil leaks from gaskets/seals over time, cam bearing wear (especially with early models), carburetor tuning adjustments needed for optimal performance.
Electrical System Considerations:
Voltage regulator failures, stator issues, and battery charging system problems can occur with age and mileage. Wiring harness integrity should be checked.
Belt Drive Wear:
The drive belt can wear and require adjustment or replacement; improper tension can lead to premature wear.
Suspension Wear:
Fork seals can leak, and rear shock absorbers may lose damping effectiveness over time.