Positioning:
The Harley-Davidson FXD Dyna models of this era represented a significant evolution, offering a more modern riding experience while retaining classic Harley-Davidson character. This manual serves enthusiasts and professional mechanics seeking to maintain, repair, and customize these iconic motorcycles.
Competitors:
Competed against other cruiser manufacturers like Indian, and potentially some custom bike builders, offering a blend of performance, comfort, and customization potential within the American V-twin segment.
Features Of Vehicle:
Introduction of the Twin Cam 88 engine, Dyna chassis with vibration isolation (88B), comfortable riding position, ample torque for cruising, and a platform highly favored for customization.
Engine:
Twin Cam 88, Twin Cam 88B (Vibration Isolation System), Engine disassembly, assembly, tuning, lubrication, cooling (air-cooled), ignition, fuel injection (EFI) and carburetor systems (depending on specific model/year variants within the range).
Transmission:
5-speed Constant Mesh, gearbox disassembly, assembly, lubrication, clutch operation and adjustment, primary drive maintenance.
Electrical System:
Wiring diagrams, charging system (stator, regulator/rectifier), starting system (starter motor, solenoid), ignition system, lighting, instrumentation, horn, battery maintenance, fuses, relays.
Chassis And Suspension:
Frame inspection and repair, front fork (telescopic), rear shock absorbers, swingarm, steering head bearings, wheel bearings.
Braking System:
Front and rear hydraulic disc brakes, brake caliper maintenance, brake fluid replacement, bleeding procedures, master cylinder overhaul.
Fuel System:
Fuel tank removal/installation, fuel lines, fuel pump, fuel filter, carburetor (Keihin CV), EFI components (throttle body, injectors, ECU).
Exhaust System:
Exhaust pipe and muffler removal/installation, gasket replacement.
Bodywork And Trim:
Fenders, fuel tank, seat, fairings (if applicable to FXD models), controls, mirrors, lighting components.
Routine Maintenance:
Oil changes, filter replacements, spark plug checks/replacement, air filter cleaning/replacement, chain adjustment (if applicable to specific FXD variants), lubrication points, brake checks.
Troubleshooting:
Diagnostic charts, common problem identification, step-by-step diagnostic procedures for electrical and mechanical issues.
Repair And Overhaul:
Detailed instructions for engine disassembly/assembly, transmission rebuilds, brake system overhauls, fork and shock absorber servicing, electrical component replacement.
Technical Specifications:
Torque values, clearances, fluid capacities, electrical specifications, diagnostic codes (if applicable).
Depth:
Comprehensive, covering from basic owner maintenance to complete engine and transmission rebuilds, including detailed electrical diagnostics.
Engine Type:
Air-cooled, four-stroke, 45-degree V-twin, pushrod overhead valves (OHV).
Engine Displacement:
1450cc (88 cubic inches)
Bore X Stroke:
3.75 in x 4.00 in (95.25 mm x 101.60 mm)
Compression Ratio:
8.8:1 (typical, may vary slightly by year/model)
Horsepower:
Approx. 65-70 HP (rated at crankshaft, actual wheel horsepower will be lower)
Torque:
Approx. 86-90 lb-ft @ 3500 RPM (rated at crankshaft)
Fuel Delivery Early Years:
Keihin CV (Constant Velocity) 40mm Carburetor
Fuel Delivery Later Years Efi:
Electronic Fuel Injection (EFI) – Sequential Electronic Throttle Control (ETC) introduced later in the run, check specific model year.
Ignition Type:
Electronic ignition with single spark per cylinder (later models may have dual spark).
Oil System:
Dry Sump Lubrication System with separate oil reservoir.
Type:
5-speed Manual, Constant Mesh
Gear Ratios:
Specific ratios are detailed in the manual, typically with a lower first gear for acceleration and higher gears for highway cruising.
Optional Types:
N/A (5-speed manual was standard for FXD Dyna)
Clutch Type:
Wet, multi-plate clutch
Primary Drive:
Chain-driven, 34/46 ratio, enclosed in primary cover.
Final Drive:
Belt drive, 32/66 ratio (typical).
Wheelbase:
Approx. 63.5 inches (1612.9 mm)
Length:
Approx. 90.5 inches (2298.7 mm)
Seat Height:
Approx. 26.5 inches (673.1 mm) unladen
Dry Weight:
Approx. 600-630 lbs (272-286 kg), depending on specific FXD configuration.
Gross Vehicle Weight Rating:
Typically around 925 lbs (420 kg)
Cargo Capacity:
N/A (Motorcycle)
Crash Test Ratings:
N/A (Motorcycles are not typically subjected to standardized crash testing like automobiles)
Braking System:
Dual hydraulic disc brakes, front and rear. Early models may not feature ABS. Later years might offer optional ABS.
Lighting:
Halogen headlight, taillight, brake light, turn signals.
Frame Construction:
Steel tube frame with integral swingarm.
Vibration Isolation:
Dyna chassis features rubber isolation for the engine/transmission (FXD 88B models) to reduce rider fatigue.
Infotainment System:
Basic - Primarily focused on rider controls and instrumentation. Some models might have provisions for aftermarket audio systems.
Driver Assistance Features:
N/A (No electronic driver assistance systems like ABS were standard across all models in this range; ABS was often an option.
Connectivity Features:
N/A (No integrated smartphone connectivity or Bluetooth features in the factory setup).
Instrument Cluster:
Analog speedometer, tachometer (optional on some FXD models), odometer, trip meter, indicator lights for turn signals, oil pressure, neutral, and high beam.
Initial Service:
First service typically recommended at 1,000 miles (1600 km) for oil change, filter replacement, and general inspection.
Regular Oil Change:
Every 5,000 miles (8,000 km) or 6 months, whichever comes first (check manual for exact specification).
Primary Chain Case Oil Change:
Recommended at 2,500 miles (4,000 km) or annually.
Transmission Oil Change:
Recommended at 10,000 miles (16,000 km) or 12 months.
Spark Plug Replacement:
Typically recommended every 10,000-15,000 miles (16,000-24,000 km), depending on plug type.
Engine Oil:
Harley-Davidson Genuine V-Twin 20W-50 Motorcycle Oil or equivalent API CG-4 rated oil. Capacity: Approx. 4 quarts (3.8 liters) with filter change. Use Harley-Davidson oil filter (e.g., 63796-77A or equivalent).
Primary Chain Case Oil:
Harley-Davidson Genuine Primary Chain Lubricant or equivalent. Capacity: Approx. 1 quart (0.95 liters).
Transmission Oil:
Harley-Davidson Genuine Transmission Fluid or equivalent. Capacity: Approx. 1 quart (0.95 liters).
Brake Fluid:
DOT 4 Heavy Duty Brake Fluid.
Twin Cam 88 Cam Chain Tensioner:
Early Twin Cam 88s (pre-2007) used plastic cam chain tensioner shoes which could wear out prematurely, leading to noise or potential engine damage. Many owners upgraded to hydraulic tensioners. This manual will detail the inspection and replacement procedures.
Starter Clutch Wear:
Some models experienced wear in the starter clutch assembly, leading to grinding noises or failure to engage the starter motor.
Rear Brake Caliper Seizures:
Occasional reports of rear brake calipers seizing due to heat and lack of use/maintenance. Regular brake fluid flushes are important.
Carburetor Tuning Issues:
Keihin CV carburetors can sometimes be finicky and require precise adjustments for optimal performance, especially at altitude or with aftermarket modifications.
Harley Davidson Legacy:
Harley-Davidson, founded in 1903, is an iconic American motorcycle manufacturer known for its V-twin engines, distinctive styling, and a rich history in racing, touring, and custom culture.
Dyna Series Introduction:
The Dyna line was introduced in 1991 as a successor to the popular Sportster Evolution engine-based FXRs. The FXD models, specifically, were designed as a more accessible and rider-friendly cruiser compared to some of the other Dyna variants.
Twin Cam 88 Introduction:
The 1999 model year marked a significant change with the introduction of the Twin Cam 88 engine, replacing the Shovelhead and Evolution Big Twin engines. This engine provided increased power, torque, and reliability, and formed the basis for Harley-Davidson's V-twin offerings for many years.
Manufacturing Location:
United States (primarily Milwaukee, Wisconsin, and York, Pennsylvania)
Key Production Years For This Manual:
1999-2005, representing a specific generation of the Twin Cam 88 equipped FXD Dyna.
Motorcycle Awards:
While specific awards for the FXD Dyna between 1999-2005 are not readily cataloged as with cars, the Dyna platform as a whole has been consistently praised for its balance of handling, comfort, and classic Harley-Davidson styling, making it a popular choice and a staple in the cruiser market.
Reliability Ratings:
Reliability is generally good with proper maintenance, though known issues like cam chain tensioners require attention. Consumer satisfaction surveys typically rank Harley-Davidson highly for brand loyalty and ownership experience.
Emissions Certification:
Vehicles manufactured within these years would meet relevant US EPA and California ARB emissions standards applicable at the time of sale, with specifications and diagnostic procedures detailed in the manual.
