Engine:
1200cc Evolution V-Twin engine (carbureted and fuel-injected variants as applicable to 2010 Sportster 1200 models)
Transmission:
5-speed Cruise Drive transmission
Clutch:
Clutch operation, adjustment, and component service
Fuel Delivery:
Fuel tank, fuel lines, fuel pump, fuel injectors (EFI models), carburetor (carbureted models), throttle body
Ignition System:
Ignition module, spark plugs, ignition coils, crank position sensors
Exhaust System:
Exhaust pipes, mufflers, catalytic converter (if applicable)
Cooling System:
Air-cooled engine, oil cooling system (if equipped)
Lubrication System:
Oil pump, oil filter, oil lines, oil capacity, oil change procedures
Electrical System:
Battery, charging system (stator, voltage regulator), starting system (starter motor, solenoid), lighting, instrumentation, horn, wiring diagrams
Lighting:
Headlight, taillight, turn signals, brake lights, dashboard illumination
Instrumentation:
Speedometer, tachometer, indicator lights, diagnostic codes
Brakes:
Front and rear brake systems, hydraulic lines, master cylinders, calipers, rotors, brake fluid specifications
Suspension:
Front forks (cartridge type), rear shock absorbers, fork oil specifications, rear suspension adjustments
Wheels And Tires:
Wheel types, tire sizes, tire pressure specifications, wheel bearing service
Frame And Bodywork:
Frame construction, body panels, fenders, fuel tank mounting, seat mounting
Steering:
Handlebars, triple clamps, steering head bearings, adjustment and service
Routine Maintenance:
Oil changes, filter replacements, chain lubrication/adjustment (if applicable to model), tire pressure checks, brake fluid checks, spark plug replacement
Engine Overhaul:
Piston removal/installation, cylinder head service, valve adjustments, camshaft replacement, crankshaft service
Transmission Service:
Clutch plate replacement, gear inspection, bearing service, transmission fluid changes
Electrical Diagnostics:
Troubleshooting electrical faults, wiring harness inspection, component testing
Fuel System Repair:
Carburetor cleaning and adjustment, fuel injector cleaning, fuel pump replacement, throttle cable adjustment
Brake System Maintenance:
Brake pad replacement, caliper service, bleeding the brake system, master cylinder overhaul
Suspension Service:
Fork seal replacement, fork oil change, rear shock absorber replacement or service
Wheel And Tire Service:
Tire mounting and balancing, wheel bearing replacement
Troubleshooting Guides:
Step-by-step diagnostic procedures for common and uncommon issues
Torque Specifications:
Detailed torque values for all critical fasteners
Depth:
Comprehensive factory-level repair and diagnostics
Diagnostics:
Detailed diagnostic flowcharts and trouble codes (DTCs) for EFI models
Rebuilds:
Engine and transmission rebuild procedures included
Engine Type:
Evolution V-Twin, Air-Cooled
Displacement:
1200cc (73.2 cubic inches)
Bore X Stroke:
3.50 in. x 3.81 in. (88.9 mm x 96.8 mm)
Compression Ratio:
9.0:1 (typical for this era)
Valvetrain:
Pushrod-actuated overhead valves, 2 valves per cylinder
Horsepower:
Approximately 60-67 HP (exact figures vary slightly by year and tuning, typical range)
Torque:
Approximately 70-75 ft-lbs @ 3500-4000 RPM (typical range)
Fuel Delivery:
Electronic Sequential Port Fuel Injection (ESPFI) or Keihin CV 40mm Carburetor (depending on specific 1200 model variant for 2010)
Fuel Type:
Unleaded gasoline, minimum 91 octane (95 RON) recommended
Oil Type:
Harley-Davidson Genuine V-Twin Oil 20W-50 or equivalent API SG, or higher, JASO FD, FD2, or FL approved motorcycle oil
Oil Capacity:
Approx. 3 quarts (2.8 liters) with filter change
Initial 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 Oil 20W-50 (API SG, JASO FD/FD2/FL approved)
Transmission Oil:
Harley-Davidson Syn3 or SAE 75W-90 GL-5 gear oil
Fork Oil:
Harley-Davidson Type E (5W) or Type H (10W) fork oil (specific weight depends on rider preference and model variant)
Common Wear Items:
Clutch plates, brake pads, wheel bearings, fork seals, spark plugs
Potential Electrical Issues:
Voltage regulator failure, stator issues (less common on later models but still possible), loose electrical connections
Fuel System Maintenance:
Carburetor cleaning for older models, occasional injector cleaning for EFI models