Target Audience:
Harley-Davidson owners, independent repair shops, motorcycle enthusiasts seeking in-depth maintenance and repair knowledge.
Value Proposition:
Provides comprehensive, factory-level repair and maintenance information for the 2007 Sportster 1200 Nightster, often exceeding the detail found in generic aftermarket manuals.
Content Focus:
Detailed procedural steps, clear diagnostic flowcharts, and specific technical data crucial for accurate servicing.
Engine Mechanics:
Full overhaul procedures, top-end and bottom-end rebuilds, component diagnostics, performance tuning adjustments.
Fuel System:
Carburetor (Keihin CV 40mm) disassembly, cleaning, adjustment, troubleshooting, fuel pump and filter service.
Ignition System:
Ignition module, coil, spark plug service, timing adjustments, diagnostic procedures.
Transmission And Drivetrain:
5-speed constant mesh transmission service, clutch operation and adjustment, primary drive chain, final belt drive inspection and maintenance.
Electrical System:
Wiring diagrams, charging system (stator, regulator/rectifier), starting system (starter motor, solenoid), lighting, instrumentation, accessory circuits.
Braking System:
Front and rear brake caliper service, master cylinder overhaul, brake fluid replacement, line bleeding, rotor and pad inspection.
Suspension And Steering:
Front fork (49mm, Showa) disassembly, service, fluid replacement, rear shock absorber inspection and replacement, steering head bearing adjustment.
Frame And Bodywork:
Frame inspection, collision repair guidelines, fairing and body panel removal/installation, seat and fender service.
Wheels And Tires:
Wheel bearing maintenance, tire mounting and balancing, spoke tension inspection (if applicable).
Routine Maintenance:
Oil and filter changes, air filter replacement, spark plug replacement, chain lubrication and adjustment, brake pad inspection.
Troubleshooting:
Diagnostic flowcharts for common starting, running, and electrical issues, symptom-based repair guidance.
Component Rebuilds:
Detailed step-by-step instructions for rebuilding carburetors, brake master cylinders, and engine components.
Electrical Diagnostics:
Testing procedures for voltage, resistance, and continuity across various electrical components.
Suspension Service:
Front fork oil change and seal replacement, rear shock absorber installation.
Diagnostic Capabilities:
Advanced troubleshooting for ignition and fuel delivery systems, electrical faults, and mechanical noises.
Repair Complexity:
Covers basic to advanced mechanical and electrical repairs, including full engine and transmission overhauls.
Special Tools:
Lists and describes necessary special tools and equipment for specific procedures.
Engine Type:
Air-cooled, Evolution V-twin
Displacement:
73.38 cu in (1202 cc)
Bore X Stroke:
3.50 in x 3.81 in (88.9 mm x 96.8 mm)
Valve Train:
Pushrod-actuated, overhead valves with two valves per cylinder
Horsepower Rating:
Approx. 66 hp @ 5800 rpm (estimated, factory specs vary)
Torque Rating:
Approx. 70 ft-lbs @ 3200 rpm (estimated, factory specs vary)
Fuel Delivery:
Keihin CV 40mm Carburetor
Fuel Type:
Unleaded gasoline, minimum 87 octane
Engine Oil Capacity:
3.0 US qt (2.8 L) with filter change
Engine Oil Type:
Harley-Davidson Genuine V-Twin 20W-50 Motorcycle Oil or equivalent SAE 20W-50 motorcycle-specific oil
Transmission Type:
5-speed constant mesh
Transmission Variants:
Not applicable for this model year/variant.
Clutch Type:
Wet, multi-plate, diaphragm spring
Primary Drive:
Duplex chain, 1.235:1 ratio
Final Drive:
Belt drive, 32/66 tooth sprockets, 2.06:1 ratio
Transmission Oil Type:
Harley-Davidson Genuine Formula+ Transmission and Primary Chaincase Lubricant or equivalent SAE 85W-140 motorcycle gear oil
Transmission Oil Capacity:
24 US fl oz (0.71 L)
Audio System:
No integrated audio system. Provisions for aftermarket installation.
Instrumentation:
Analog speedometer, tachometer (optional), odometer, trip meter, indicator lights for turn signals, oil pressure, engine malfunction, and neutral.
ABS:
Not standard on this model.
Bluetooth:
Not standard on this model.
First Service:
1,000 miles (1,600 km) or 6 months
Subsequent Service:
Every 5,000 miles (8,000 km) or 12 months thereafter
Engine Oil Change Interval:
Every 2,500 miles (4,000 km) or 6 months
Transmission Oil Change Interval:
Every 10,000 miles (16,000 km) or 24 months
Front Fork Oil Type:
Harley-Davidson Genuine Fork Oil or SAE 15W
Front Fork Oil Capacity:
Approximately 12.9 US fl oz (380 ml) per fork leg
Common Wear Items:
Clutch plates, belt drive components, wheel bearings, fork seals due to high mileage and usage.
Electrical Concerns:
Occasional issues with regulator/rectifier failures or stator winding degradation can occur.
Carburetor Tuning:
CV carburetor may require periodic adjustments for optimal performance, especially after modifications or altitude changes.
Harley Davidson Legacy:
Founded in 1903, Harley-Davidson is an iconic American motorcycle manufacturer known for its V-twin engines and cruiser-style motorcycles.
Sportster Lineage:
The Sportster line, introduced in 1957, is one of Harley-Davidson's longest-running models, evolving from a lightweight sport bike to a versatile cruiser.
Nightster Introduction:
The Nightster variant of the Sportster was introduced to offer a more stripped-down, dark, and performance-oriented aesthetic compared to other Sportster models.
Manufacturing Location:
Milwaukee, Wisconsin, USA
