Market Segment:
Performance Cruiser / Sport Cruiser
Target Audience:
Riders seeking a more performance-oriented Harley-Davidson experience, capable of touring and spirited riding.
Competitors Era:
Other American cruisers with a sporty bias, Japanese performance motorcycles.
Distinctive Attributes:
Sportier ergonomics than standard Low Rider, often featuring dual front disc brakes, performance-tuned suspension, and a more aggressive styling.
Benefit To Owner:
Empowers owners to perform detailed maintenance and repairs, reducing reliance on expensive dealership services and ensuring optimal performance and longevity.
Engine Mechanical:
Full engine disassembly, assembly, inspection, and repair of cylinders, pistons, crankshaft, connecting rods, camshafts, valves, lifters, pushrods, oil pump, timing.
Fuel System:
Carburetor (likely Keihin CV), fuel tank, fuel lines, fuel pump (if applicable), fuel filters, troubleshooting.
Ignition System:
Ignition module, ignition coil, spark plugs, wiring, troubleshooting.
Electrical System:
Battery, charging system (alternator, regulator/rectifier), starting system (starter motor, solenoid), lighting (headlight, tail light, signals), instrumentation, wiring diagrams, troubleshooting.
Transmission:
Clutch, primary drive, transmission case, gears, shift drum, shift forks, final drive, chain, sprockets, troubleshooting.
Suspension:
Front forks (telescopic), rear shock absorbers, swingarm, bushings, seals, troubleshooting.
Brakes:
Front and rear brake calipers, master cylinders, brake lines, brake pads, brake discs, bleeding procedures, troubleshooting.
Frame And Bodywork:
Frame inspection, wheels, tires, handlebars, controls, fenders, seat, fuel tank mounting, fairing (if applicable), exhaust system.
Diagnostics And Troubleshooting:
Systematic fault finding, diagnostic procedures, error codes (if applicable), symptom-based troubleshooting.
Routine Maintenance:
Oil changes, filter replacement, spark plug service, chain adjustment, brake pad inspection, tire pressure checks.
Major Repairs:
Engine rebuilding, transmission overhauls, suspension fork rebuilds, brake system repairs.
Electrical Diagnostics:
Wiring diagram interpretation, component testing, charging system analysis.
Carburetor Tuning:
Adjustment, cleaning, rebuilding of the Keihin CV carburetor.
Special Tools:
Identification and usage of specialized Harley-Davidson tools for various procedures.
Depth Of Coverage:
Comprehensive factory-level repair and maintenance information, suitable for experienced mechanics and advanced DIY enthusiasts.
Engine Type:
Air-cooled, 45-degree V-twin, Evolution engine
Displacement:
1339.6 cc (81.8 cubic inches)
Bore X Stroke:
3.498 in x 4.252 in (88.85 mm x 107.95 mm)
Compression Ratio:
Approximately 8.5:1 to 9.0:1 (depending on specific year/market)
Valve Train:
Overhead valves (OHV), two valves per cylinder, pushrod actuated
Engine Mounting:
Rubber isolated
Horsepower:
Estimated 65-70 HP at the crankshaft (actual figures varied slightly by year)
Torque:
Estimated 70-75 ft-lbs at around 3200 RPM (actual figures varied slightly by year)
Carburetor:
Keihin CV (Constant Velocity) 40mm
Fuel Capacity:
Approx. 3.5 - 4.0 gallons (13.2 - 15.1 liters)
Oil Type:
Harley-Davidson Genuine V-Twin Oil or equivalent SAE 20W50 motorcycle oil
Oil Capacity:
Approx. 3 quarts (2.8 liters) with filter change
Ignition Type:
Electronic Ignition
Length:
Approx. 90 inches (2286 mm)
Width:
Approx. 35 inches (889 mm) at handlebars
Height:
Approx. 48 inches (1219 mm) at windshield
Wheelbase:
Approx. 63.5 inches (1613 mm)
Dry Weight:
Approx. 570-600 lbs (259-272 kg)
Gross Vehicle Weight Rating Gvwr:
Not explicitly stated, but designed for rider + passenger + luggage.
Front Tire Size:
Typically 100/90-19
Rear Tire Size:
Typically 130/90-16
Wheel Type:
Cast aluminum wheels
Front Suspension Type:
Telescopic forks with air assist (some models) or adjustable damping
Front Fork Travel:
Approx. 4.4 inches (112 mm)
Rear Suspension Type:
Swingarm with dual shock absorbers, adjustable preload
Rear Shock Travel:
Approx. 3.0 inches (76 mm)
Safety Ratings:
Motorcycles are not rated by agencies like NHTSA in the same way as cars.
Brakes Standard:
Dual front disc brakes (on most FXRS-SP models), single rear disc brake.
Lighting:
Halogen headlight, taillight, brake light, front and rear turn signals.
Frame Construction:
Steel tube frame designed for stability and rider feedback.
Ergonomics:
Sportier rider triangle compared to standard cruisers, contributing to better control.
Initial Service:
Typically at 1,000 miles (1,600 km) for engine oil and filter change, primary chaincase lubricant check, and general inspection.
Subsequent Oil Changes:
Every 5,000 miles (8,000 km) or annually, whichever comes first.
Primary Chaincase Lubricant Change:
Every 10,000 miles (16,000 km) or every two years.
Spark Plug Replacement:
Every 10,000 miles (16,000 km)
Belt Drive Inspection:
Inspect at every service; check tension and condition.
Engine Oil Spec:
SAE 20W50 motorcycle specific (e.g., Harley-Davidson Genuine V-Twin Oil)
Primary Chaincase Lubricant Spec:
SAE 90W gear oil (e.g., Harley-Davidson Primary Chaincase Lubricant)
Brake Fluid Spec:
DOT 4 hydraulic brake fluid (check specific manual for confirmation on original spec vs. modern equivalents)
Fork Oil Spec:
Specific fork oil viscosity (e.g., Showa SS-04 or equivalent, typically around SAE 10W)
Evolution Engine Notes:
Known for solid reliability but can be prone to oil leaks if seals are neglected. Cam chain tensioner wear is a consideration on earlier Evos.
Carburetor Notes:
Keihin CV carburetors are generally reliable but may require periodic cleaning and adjustment due to ethanol in fuel or general wear. Diaphragm integrity is crucial.
Electrical Notes:
Aging wiring harnesses can develop issues, particularly with insulation breakdown. Regulator/rectifier failures can occur.
Suspension Notes:
Fork seals can weep over time. Rear shocks may lose damping effectiveness with age and mileage.
Belt Drive Notes:
Requires proper tensioning to prevent premature wear and potential belt failure. Check for cracks or fraying.
Harley Davidson Legacy:
Harley-Davidson has a long-standing heritage in motorcycle manufacturing, known for its V-twin engines and iconic styling.
Evolution Engine Introduction:
The Evolution engine was introduced in 1984 for the Softail models and later in 1985 for the Big Twin models, replacing the Shovelhead engine.
Fxrs Sp Development:
The FXRS-SP was developed as a performance-oriented version of the popular Low Rider, offering improved handling and braking for a sportier riding experience within the cruiser segment.
Production Period:
The FXRS-SP model line ran through various iterations, with this specific manual covering the 1988-1993 period.
