1986 Honda Shadow 1100 Service Manual

The 1986 Honda Shadow 1100 is a V-twin cruiser motorcycle featuring a 1099cc liquid-cooled engine, shaft drive system, hydraulic disc brakes, and comprehensive electronic ignition. This service manual covers maintenance procedures, specifications, troubleshooting, and repair guidelines for proper upkeep and optimal performance. Below are key sections for safety, maintenance schedules, engine service, electrical systems, and troubleshooting.

Specifications

Technical specifications for the 1986 Honda Shadow 1100.

Maintenance Schedule

Regular maintenance intervals for optimal performance and longevity.

1. Oil and filter change: Every 3,000 miles or 6 months
2. Air filter cleaning: Every 6,000 miles
3. Spark plug replacement: Every 7,500 miles
4. Valve clearance check: Every 8,000 miles
5. Brake fluid change: Every 2 years
6. Coolant replacement: Every 2 years or 16,000 miles
7. Drive shaft lubrication: Every 12,000 miles

WARNING! Always use genuine Honda parts and recommended fluids for maintenance.

Engine Service

Engine maintenance and repair procedures.

1. Oil change procedure: Drain plug removal, filter replacement, refill with 10W-40
2. Valve adjustment: Cold engine measurement, intake: 0.004 in, exhaust: 0.005 in
3. Cylinder compression test: Normal range 150-175 psi
4. Timing chain inspection: Check tensioner wear and chain stretch
5. Cooling system: Radiator flush, thermostat replacement at 22,000 miles

CAUTION! Engine must be cool before performing service work.

Fuel System

Carburetor service and fuel system maintenance.

• Carburetor synchronization: Use vacuum gauges for balanced operation
• Fuel filter replacement: Every 12,000 miles
• Idle speed adjustment: 950 ± 50 rpm
• Float level setting: 15.5mm from carburetor body
• Pilot screw setting: 2-1/4 turns out from lightly seated position

Electrical System

Battery, charging system, and ignition maintenance.

Battery: 12V 14Ah, specific gravity: 1.280 at 68°F

Charging system output: 14V at 5000 rpm

Spark plug gap: 0.028-0.031 inches

Ignition timing: "F" mark alignment at 1400 rpm

Bulb specifications: Headlight 60/55W, Brake light 21W, Turn signal 21W

Brake System

Hydraulic brake service and maintenance procedures.

1. Brake pad inspection: Replace when worn to 1mm thickness
2. Brake fluid specification: DOT 4
3. Rotor thickness: Minimum 4.0mm front, 5.0mm rear
4. Bleeding procedure: Master cylinder to caliper, avoid air bubbles
5. Brake line inspection: Check for cracks or swelling every 6 months

Tip: Always clean brake components with isopropyl alcohol during service.

Suspension & Steering

Front fork and rear shock maintenance.

1. Fork oil change: Every 15,000 miles, 486cc per leg
2. Fork oil weight: 10W
3. Steering head bearing adjustment: Proper preload, no play
4. Rear shock preload: 5-position adjustable
5. Wheel bearing inspection: Check for smooth rotation and no play

WARNING! Use proper jack stands when working on suspension components.

Drive System

Shaft drive and final drive maintenance.

• Final drive oil: 80W-90 gear oil, 180ml capacity
• Drive shaft splines: Lubricate with moly paste every 12,000 miles
• Universal joint inspection: Check for play or binding
• Wheel alignment: Ensure proper alignment marks

Troubleshooting

Reset: Disconnect battery for 30 minutes to reset ECU if applicable.

Safety Precautions

Always wear appropriate safety gear and follow proper procedures.

CAUTION! Use jack stands, avoid hot surfaces, and disconnect battery before electrical work. Work in well-ventilated area when handling fuels and chemicals.