Engine:
Twin Cam 88 (EFI and Carbureted variants), Twin Cam 95 (optional/screamin eagle), internal engine components (pistons, rings, valves, cams, lubrication, cooling)
Fuel System:
Electronic Fuel Injection (EFI) systems (e.g., Delphi Electronic Control Module - ECM), Carbureted systems (e.g., Keihin CV carburetor), fuel pumps, filters, lines
Ignition System:
Electronic ignition, spark plugs, ignition coils, crank position sensor, troubleshooting ignition faults
Transmission:
5-speed Cruise Drive Transmission, clutch operation and service, gearbox internals, primary drive, final drive
Electrical System:
Wiring diagrams, battery maintenance, charging system (alternator, regulator), starter motor, lighting systems (headlamp, taillamp, turn signals), gauges, horn, accessory circuits
Brakes:
Hydraulic brake systems (front and rear), brake calipers, master cylinders, brake pads, rotors, brake fluid specifications and bleeding procedures
Suspension:
Front fork (e.g., 49mm Tele-Guide), rear shock absorbers, wheel bearings, swingarm service
Frame And Body:
Frame inspection and repair, body panel removal and installation, fairings, saddlebags, mounting hardware
Wheels And Tires:
Wheel specifications, tire types and sizes, balancing, spoke tension (if applicable)
Exhaust System:
Exhaust pipe routing, mufflers, heat shields, exhaust gasket replacement
Diagnostics:
Troubleshooting common issues, diagnostic trouble codes (DTCs) for EFI models, diagnostic connectors and procedures
Scheduled Maintenance:
Oil changes, filter replacements, spark plug replacement, drive belt inspection, chain adjustment (if applicable), brake service, fluid changes
Engine Repair:
Top-end overhaul (cylinder head, valves, pistons), bottom-end overhaul (crankshaft, connecting rods), cam replacement, timing procedures
Transmission Repair:
Clutch adjustment and replacement, gearbox disassembly and reassembly, bearing replacement
Electrical Troubleshooting:
Wiring diagram interpretation, fault finding for lighting, charging, starting, and ignition systems
Brake System Service:
Brake pad replacement, caliper service, master cylinder overhaul, bleeding procedures, fluid flush
Suspension Service:
Fork seal replacement, fork oil changes, shock absorber replacement, swingarm bushing replacement
Efi Tuning And Diagnostics:
ECM diagnostics, sensor testing, fuel injector service, throttle body cleaning
Bodywork Repair:
Fairing repair and mounting, saddlebag installation and removal, cosmetic component replacement
Torque Specifications:
Detailed torque values for all critical fasteners
Depth:
Comprehensive (suitable for professional technicians and experienced DIYers)
Diagnostic Capability:
Advanced diagnostic procedures for EFI systems, including component testing and troubleshooting logic
Rebuild Procedures:
Detailed step-by-step instructions for complete engine and transmission rebuilds
Special Tools:
Identification and usage of specialized Harley-Davidson tools required for specific procedures
Engine Family:
Harley-Davidson Twin Cam
Displacement Options:
88 cubic inches (1450cc), 95 cubic inches (1550cc - Screamin' Eagle/optional)
Configuration:
45-degree V-twin, pushrod actuated overhead valves
Horsepower Approximate:
60-70 HP (varies by specific model and tuning, for Twin Cam 88)
Torque Approximate:
80-90 lb-ft (varies by specific model and tuning, for Twin Cam 88)
Carbureted Models:
Keihin CV (Constant Velocity) carburetor, 40mm
Efi Models:
Multi-point Fuel Injection with Delphi Electronic Control Module (ECM)
Fuel Type Required:
Unleaded gasoline, minimum 91 octane (octane rating may vary by region/recommendation)
Oil Type:
Harley-Davidson SYN3 Full Synthetic Motorcycle Oil or equivalent SAE 20W-50 API CI-4 (or compatible specification)
Oil Capacity Engine:
Approx. 3.5 US quarts (3.3 liters) with filter change
Cooling Method:
Air-cooled
Type:
5-speed constant mesh, helical gears
Gear Ratios:
Specific ratios are detailed within the manual for each gear (e.g., 1st: 9.315, 2nd: 6.654, 3rd: 4.948, 4th: 3.879, 5th: 3.150 - illustrative, actual ratios may vary)
Clutch Type:
Wet, multi-plate, diaphragm spring
Transmission Oil Type:
Harley-Davidson Formula + Transmission Oil or equivalent SAE 85W-140 API GL-5
Primary Drive Type:
Enclosed, wet clutch, primary chain drive to transmission
Engine Oil Change:
Every 5,000 miles (8,000 km) or annually, whichever comes first
Primary Chain Tensioner Inspection:
Inspect every 10,000 miles (16,000 km)
Spark Plug Replacement:
Every 10,000 miles (16,000 km) or as needed
Brake Fluid Flush:
Every 2 years (refer to manual for specific DOT rating and interval)
Transmission Oil Change:
Every 10,000 miles (16,000 km) or annually
Engine Oil Spec:
SAE 20W-50 API CI-4 (Harley-Davidson SYN3 recommended)
Transmission Oil Spec:
SAE 85W-140 API GL-5 (Harley-Davidson Formula + recommended)
Brake Fluid Spec:
DOT 4 (refer to specific model variant in manual)
Primary Chain Tensioner:
Early Twin Cam models (pre-2007) had hydraulic tensioners that could wear and fail, leading to noise and potential damage. Manual provides inspection and replacement procedures.
Cam Chain Tensioner Wear:
Similar to primary tensioner, internal cam chain tensioners can wear. Manual details inspection and replacement.
Crank Position Sensor Failure:
Can lead to no-start or intermittent stalling conditions. Manual covers testing and replacement.
Rear Main Seal Leaks:
Occasional leaks can develop. Manual covers replacement procedures, which can be involved.