Engine:
Evo Big Twin engine (1340cc/80 cu. in.), including disassembly, assembly, inspection, diagnosis, and repair.
Transmission:
5-speed constant mesh transmission, clutch, primary drive, troubleshooting, overhaul, and adjustments.
Electrical:
Wiring diagrams, ignition system, lighting, charging system (stator, regulator/rectifier), starter system, battery, troubleshooting, component testing.
Fuel System:
Carburetor (CV carb) service and tuning, fuel pump, fuel tank, fuel lines, troubleshooting.
Brakes:
Front and rear brake system, hydraulic components, bleeding procedures, pad replacement, caliper and master cylinder service.
Suspension And Steering:
Front forks (telescopic), rear shock absorbers, swingarm, steering head bearings, lubrication, and adjustment.
Chassis And Frame:
Frame inspection, alignment, component mounting, bodywork, fenders, fuel tank, seat, handlebars.
Wheels And Tires:
Wheel bearings, tire inspection and replacement, wheel balancing.
Exhaust System:
Exhaust pipes, mufflers, mounting, and gasket replacement.
Maintenance Procedures:
Regularly scheduled maintenance tasks, lubrication points, oil changes, filter replacements, spark plug service.
Diagnostic Procedures:
Detailed troubleshooting charts and step-by-step diagnostic sequences for common problems.
Repair Procedures:
In-depth instructions for disassembly, component inspection, repair, and reassembly of all major systems.
Tune Up Procedures:
Complete tune-up guidelines, including ignition timing, carburetor adjustment, and compression testing.
Special Tool Requirements:
Identification of specific Harley-Davidson and aftermarket tools required for certain procedures.
Depth Of Coverage:
Factory-level detail for mechanics and experienced DIY enthusiasts, covering everything from routine maintenance to complete engine and transmission rebuilds.
Engine Type:
Air-cooled, 45-degree V-twin, Evolution (Evo) Big Twin
Displacement:
1340 cc (80 cubic inches)
Bore X Stroke:
3.496 in x 4.250 in (88.8 mm x 108.0 mm)
Compression Ratio:
8.3:1 to 8.5:1 (varies slightly by year/model)
Horsepower Approx:
~60-65 HP (at crankshaft, estimated)
Torque Approx:
~70-75 lb-ft (at crankshaft, estimated)
Carburetor:
Keihin CV (Constant Velocity) 40 mm
Fuel Type:
Unleaded gasoline, minimum 87 octane (91 RON)
Ignition Type:
Electronic Ignition (CDI based)
Oil Type:
Harley-Davidson SAE 20W50 Motorcycle Oil (or equivalent)
Oil Capacity:
~3.5 quarts (3.3 liters) with filter change
Transmission Type:
5-speed, constant mesh
Optional Transmission:
N/A (all models in this range used the 5-speed)
Clutch Type:
Wet, multi-plate
Primary Drive:
Duplex chain, 1.47:1 ratio
Final Drive:
Belt drive, 3.15:1 ratio
Transmission Fluid Type:
Harley-Davidson Formula + (or equivalent 80W-90 GL-5 gear oil)
Transmission Fluid Capacity:
~24-28 fl oz (0.71-0.83 liters)
Wheelbase:
Approx. 63.5 inches (1613 mm), varies slightly by model.
Seat Height:
Approx. 26-27 inches (660-686 mm), varies by model.
Dry Weight:
Approx. 575-615 lbs (261-279 kg), varies by model.
Gross Vehicle Weight Rating:
Approx. 925-950 lbs (420-431 kg)
Fuel Capacity:
Approx. 4.0 - 5.0 gallons (15.1 - 18.9 liters), depending on fuel tank variant.
First Service:
1000 miles (1600 km) or 6 months
Subsequent Service Intervals:
Every 5000 miles (8000 km) or 12 months for routine checks and fluid changes. Engine internal checks typically recommended at higher mileage intervals.
Engine Oil:
Harley-Davidson SAE 20W50 Motorcycle Oil (P/N 99887-02)
Transmission Fluid:
Harley-Davidson Formula + Transmission & Primary Chaincase Lubricant (P/N 99851-05) or equivalent 80W-90 GL-5 gear oil
Primary Chaincase Oil:
Harley-Davidson Formula + Transmission & Primary Chaincase Lubricant (P/N 99851-05)
Brake Fluid:
DOT 4 hydraulic brake fluid (consult manual for specific Harley-Davidson part number, typically HD P/N 99880-83)
Common Issues Prevention:
Potential for carburetor tuning issues (CV carb sensitivity), oil leaks from gaskets/seals, primary chain tension adjustment, electrical connector corrosion. Regular maintenance and timely component replacement as per the manual are crucial.
Known Issues Impact:
These issues can affect performance, reliability, and ease of starting. The manual provides detailed steps to diagnose and rectify them.
Oil Filter Part Number:
Harley-Davidson Oil Filter: 63731-36A (common for this era, always verify with specific model).
Spark Plug Type:
Typically Champion H8C or NGK D8EA (verify with manual/service bulletin for exact fitment)
Brand Origins:
Founded in 1903 in Milwaukee, Wisconsin, USA, known for its iconic V-twin engines and cruiser motorcycle design.
Dyana Introduction:
The Dyna platform was introduced in 1991, replacing the previous FXR chassis for many models and offering a distinct styling and riding experience. It was known for its rubber-mounted engine for reduced vibration compared to earlier rigid-mount Big Twins.
Engine Platform:
These models utilize the Evolution Big Twin engine, a descendant of the Shovelhead and Panhead designs, which was a significant update at its introduction in the mid-1980s.
Production Period:
1991-2017 (Dyna platform), with this manual covering the initial 1991-1998 period.