Positioning:
Essential DIY and professional resource for Harley-Davidson enthusiasts and mechanics.
Analogy:
This manual serves as the definitive guide for the 1987 Sportster lineup, mirroring the critical role of OEM service manuals in dealership workshops.
Feature 1:
Detailed step-by-step instructions for all repair and maintenance procedures.
Feature 2:
Exploded views and detailed diagrams for easy identification of parts and systems.
Feature 3:
Troubleshooting sections to help diagnose and resolve common mechanical and electrical issues.
Feature 4:
Specifications and torque values for critical fasteners and components.
Feature 5:
Wiring diagrams crucial for electrical system diagnostics.
Engine:
V-Twin Evolution Engine (Ironhead & Evolution models relevant to 1987)
Transmission:
4-Speed and 5-Speed Transmissions (depending on specific XLH variant)
Electrical:
Ignition, Lighting, Charging System, Starter, Wiring Diagrams
Chassis:
Frame, Forks, Suspension (Front & Rear), Steering
Brakes:
Front & Rear Brake Systems (Drum & Disc variations)
Fuel System:
Carburetor(s), Fuel Tank, Fuel Lines, Fuel Pump (if applicable)
Exhaust:
Exhaust System Components
Wheels Tires:
Wheel Mounting, Tire Specifications
Bodywork:
Fenders, Seat, Fuel Tank, Handlebars, Controls
Maintenance:
Routine Service, Oil Changes, Filter Replacements, Lubrication
Troubleshooting:
Diagnostic Procedures for Common Issues
Repair:
Engine Overhaul, Transmission Repair, Electrical System Diagnosis and Repair
Disassembly Reassembly:
Step-by-step guides for major component removal and installation
Depth:
Comprehensive: From basic adjustments to full engine and transmission rebuilds.
Engine Type:
V-Twin Pushrod OHV
Displacement:
1987 Sportster models typically featured 883cc (53.9 cu in) and 1100cc (67.3 cu in) variants of the Evolution engine. Some late Ironhead models may still be present, but the focus shifts to Evolution for this year.
Bore Stroke 883:
3.00 in x 3.81 in (76.2 mm x 96.8 mm)
Bore Stroke 1100:
3.44 in x 3.75 in (87.4 mm x 95.3 mm)
Compression Ratio 883:
8.5:1 (approx.)
Compression Ratio 1100:
8.6:1 (approx.)
Carburetion:
Single Keihin butterfly CV carburetor (typically 36mm for 883, 40mm for 1100)
Horsepower 883:
Approx. 50-55 HP (estimated)
Horsepower 1100:
Approx. 60-65 HP (estimated)
Torque 883:
Approx. 55-60 ft-lbs (estimated)
Torque 1100:
Approx. 65-70 ft-lbs (estimated)
Fuel Type:
Unleaded gasoline, 87 octane minimum recommended.
Fuel Capacity:
Typically 3.3 US gallons (12.5 liters) for standard tank.
Type:
4-speed constant mesh (early models) or 5-speed constant mesh (later Evolution models).
Optional Gearbox:
N/A for 1987 Sportster; gearbox variants are based on engine displacement and model designation.
Clutch Type:
Wet multi-plate, cable-operated.
Final Drive:
Belt drive (standard on most models) or Chain drive (less common for this year but possible).
Transmission Fluid:
Harley-Davidson recommends specific transmission oil or equivalent API GL-5 rated gear oil. Check manual for precise viscosity and API rating.
Wheelbase:
Approx. 59.5 inches (1511 mm)
Length:
Approx. 87 inches (2210 mm)
Seat Height:
Approx. 26 inches (660 mm) (unladen)
Dry Weight:
Approx. 480-520 lbs (218-236 kg), varies by model and equipment.
Gross Vehicle Weight Rating:
Approximately 900 lbs (408 kg)
Safety Standards:
Meets DOT and federal motorcycle safety standards for 1987.
Braking System:
Front: Single disc brake. Rear: Drum brake (standard on most models). Some models might have optional disc rear brake.
Lighting:
Halogen headlight, taillight, brake light, turn signals.
Frame Construction:
Steel tube frame designed for rider stability and control.
Oil Change Interval:
Every 2,500 - 3,000 miles or 6 months, whichever comes first. Engine oil and primary chaincase oil are separate.
Primary Fluid Change:
Every 5,000 miles or 12 months.
Spark Plug Replacement:
Every 10,000 - 15,000 miles or as needed based on inspection.
Belt Tension Check:
Every 5,000 miles.
Engine Oil:
Viscosity: SAE 20W50 (Harley-Davidson specifically recommends their proprietary blend or equivalent API SG rated oil).
Primary Chaincase Oil:
Harley-Davidson Primary Chaincase Lubricant or equivalent wet-clutch compatible oil.
Transmission Oil:
API GL-5 rated gear oil, viscosity per manual (often SAE 80W-90 or 140).
Brake Fluid:
DOT 4 (for disc brakes).
Oil Leaks:
Common on older Harley-Davidsons, particularly around primary cover, engine base gasket, and pushrod tubes. The manual will detail seal and gasket replacement procedures.
Carburetor Tuning:
CV carburetors can require periodic adjustment or rebuild due to wear or dirt ingress. Manual provides tuning procedures.
Electrical Connections:
Corroded or loose connections can lead to intermittent electrical faults. Manual provides wiring diagrams and diagnostic steps.
Carburetor Idle Speed:
Idle speed instability can occur. Manual covers idle mixture screw and idle speed adjustment.
Valve Adjustment:
Pushrod valve adjustment is a critical maintenance item. Manual details the procedure for correct valve lash.
Heritage:
Harley-Davidson has a long-standing heritage of producing iconic motorcycles, with the Sportster line being a cornerstone since its introduction in 1957.
Evolution Transition:
1987 marked a significant transition year. The Ironhead Sportster (Shovelhead engine variant) was phasing out, with the new Evolution 'Evo' engine (also known as the 'Blockhead') becoming standard for most Sportster models. This manual would cover the early Evolution engines.
Manufacturing Location:
York, Pennsylvania, USA, and Milwaukee, Wisconsin, USA.
