1986 Honda CB450 Manual

The 1986 Honda CB450 is a classic motorcycle featuring a 447cc parallel-twin engine, 6-speed transmission, electric start, front disc brake, rear drum brake, and comprehensive instrumentation. This manual covers maintenance procedures, specifications, troubleshooting, and repair guidelines for proper operation and longevity of your motorcycle.

Features at a Glance

Key components: 447cc air-cooled parallel-twin engine, 6-speed transmission, electric start system, front hydraulic disc brake, rear mechanical drum brake, comprehensive instrumentation.

Feature	Description
Engine Type	447cc air-cooled parallel-twin
Transmission	6-speed constant mesh
Starting System	Electric start with kick starter backup
Front Brake	Hydraulic disc brake
Rear Brake	Mechanical drum brake
Fuel System	Dual carburetors
Ignition System	CDI electronic ignition
Suspension Front	Telescopic fork
Suspension Rear	Dual shock absorbers
Instrumentation	Speedometer, tachometer, warning lights

Installation & Assembly

Unpack and inspect all components. Ensure proper assembly before operation.

1. Handlebar installation: Align and tighten clamp bolts to specified torque.
2. Mirror attachment: Screw mirrors into handlebar ends securely.
3. Battery connection: Connect positive terminal first, then negative.
4. Fuel system: Connect fuel lines and check for leaks.
5. Final inspection: Verify all fasteners are properly tightened.

WARNING! Motorcycle is heavy; use proper lifting techniques. Ensure all connections are secure before operation.

First-Time Setup

Complete initial setup procedures before first ride.

1. Fuel system: Fill with fresh unleaded gasoline (87 octane minimum).
2. Oil check: Verify engine oil level is between marks on dipstick.
3. Tire pressure: Inflate to recommended pressures (front: 28 psi, rear: 32 psi).
4. Battery: Ensure fully charged before initial start.
5. Controls: Verify proper operation of throttle, clutch, and brakes.

CAUTION! Always wear proper protective gear. Perform pre-ride inspection before each use.

Specifications

• Engine: 447cc air-cooled parallel-twin
• Bore x Stroke: 70.0 x 58.0 mm
• Compression Ratio: 9.3:1
• Transmission: 6-speed constant mesh
• Final Drive: Chain
• Fuel Capacity: 3.7 gallons
• Oil Capacity: 2.7 quarts
• Seat Height: 31.5 inches
• Weight: 419 lbs (wet)
• Brakes: Front disc, rear drum

Controls and Instrumentation

Familiarize yourself with all controls before operation.

Right Handlebar: Throttle, front brake lever, engine stop switch, start button.

Left Handlebar: Clutch lever, turn signal switch, horn button, headlight dimmer.

Instrument Panel: Speedometer, tachometer, neutral indicator, turn signal indicators, high beam indicator, oil pressure warning light.

Foot Controls: Gear shift lever (left), rear brake pedal (right).

Maintenance Procedures

Regular maintenance ensures optimal performance and longevity.

1. Oil change: Every 3,000 miles or 6 months
2. Chain adjustment: Check every 500 miles
3. Spark plugs: Replace every 7,500 miles
4. Air filter: Clean every 3,000 miles, replace every 12,000 miles
5. Brake fluid: Replace every 2 years
6. Tire inspection: Check pressure and condition before each ride

Tip: Keep detailed maintenance records for reference.

Engine Operation

Proper starting and operation procedures.

1. Starting: Turn fuel valve to ON, ensure transmission in neutral, pull choke (cold starts), press start button.
2. Warm-up: Allow engine to warm for 1-2 minutes before riding.
3. Shifting: Use clutch for all gear changes. Shift pattern: 1-down, 5-up.
4. Breaking-in: Vary engine speed during first 500 miles. Avoid full throttle operation.
5. Shutdown: Turn engine stop switch to OFF, turn ignition key to OFF.

WARNING! Never operate engine in enclosed space. Carbon monoxide can be fatal.

Safety Features

Neutral safety switch: Prevents starting in gear. Brake light: Activates with front or rear brake application. Turn signals: Self-canceling after turns.

Care & Cleaning

Clean motorcycle regularly to maintain appearance and prevent corrosion.

CAUTION! Avoid high-pressure water spray on electrical components. Use mild detergent and soft cloth. Dry thoroughly after washing.

Regulatory Information

Complies with DOT and EPA regulations for 1986 model year motorcycles. Manufactured by Honda Motor Co., Ltd. For technical support, contact authorized Honda dealership or Honda Customer Service.

Troubleshooting

Symptom	Possible Cause	Corrective Action
Engine won't start	Fuel, spark, or battery issue	Check fuel valve, spark plugs, battery charge
Poor performance	Dirty air filter, clogged carburetor	Clean/replace air filter, service carburetor
Electrical issues	Battery, fuse, or wiring	Check battery voltage, inspect fuses and connections
Brake problems	Worn pads, air in lines	Inspect brake components, bleed hydraulic system
Chain noise	Loose or worn chain	Adjust chain tension, lubricate, or replace

Service: Contact authorized Honda dealership for major repairs.

Parts: Use genuine Honda parts for optimal performance and safety.