1986 FZ600 Manual

The 1986 Yamaha FZ600 is a sport motorcycle featuring a 600cc liquid-cooled, four-stroke, DOHC inline-four engine with 16 valves, producing approximately 77 horsepower. It includes a 6-speed transmission, tubular steel diamond frame, anti-dive front forks, mono-shock rear suspension, dual front disc brakes, single rear disc brake, and digital instrumentation. Below are key sections covering specifications, maintenance, operation, troubleshooting, and service procedures.

1. Specifications 2. Maintenance Schedule 3. Operation Controls 4. Engine System 5. Electrical System 6. Chassis & Suspension 7. Brake System 8. Fuel System 9. Lubrication 10. Troubleshooting 11. Service Information

Specifications

Key technical data for the 1986 Yamaha FZ600 motorcycle.

Feature	Description
Engine Type	Liquid-cooled, 4-stroke, DOHC inline-four
Displacement	599cc
Bore x Stroke	58.0 x 56.8mm
Compression Ratio	11.2:1
Fuel System	Mikuni BS34SS carburetors (4)
Ignition	CDI (Capacitor Discharge Ignition)
Transmission	6-speed constant mesh
Final Drive	Chain
Frame	Tubular steel diamond type
Seat Height	31.1 inches
Wet Weight	432 lbs
Fuel Capacity	4.8 gallons

Maintenance Schedule

Regular maintenance intervals for optimal performance and longevity.

Oil Change: Every 3,000 miles or 6 months
Oil Filter: Replace with every oil change
Air Filter: Clean every 3,000 miles, replace every 12,000 miles
Spark Plugs: Replace every 6,000 miles
Valve Clearance: Check every 6,000 miles
Chain Adjustment: Every 500 miles
Brake Fluid: Replace every 2 years
Coolant: Replace every 2 years

WARNING! Always use manufacturer-recommended fluids and parts. Perform maintenance in well-ventilated area.

Operation Controls

Understanding the motorcycle's control layout and instrumentation.

Handlebar Controls: Right side - throttle, front brake lever, engine kill switch, start button. Left side - clutch lever, turn signals, horn, headlight dimmer.

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

Key Positions: OFF, ON, PARK (tail light only), LOCK (steering lock).

Engine System

Engine Oil: SAE 10W-40, API SE or SF grade, 3.2 quarts with filter change
Cylinder Arrangement: Inline-four, forward inclined 45 degrees
Valve Train: DOHC, 4 valves per cylinder
Starting System: Electric start with backup kick starter
Cooling System: Liquid-cooled with radiator and thermostat
Exhaust System: 4-into-2-into-1 configuration

Electrical System

Battery: 12V 10Ah, maintenance-free. Charging System: Three-phase AC generator. Headlight: 60/55W halogen. Fuse Box: Located under seat, contains main fuse (30A) and circuit fuses (10A).

Wiring Diagram: Refer to separate electrical section for complete schematic.

Chassis & Suspension

Front Suspension: Telescopic forks with anti-dive system, 5.1 inches travel. Rear Suspension: Mono-shock with adjustable preload, 4.7 inches travel. Wheels: Cast aluminum, front 16-inch, rear 18-inch. Tires: Front 110/80V16, Rear 130/80V18.

Check tire pressure weekly: Front 28 psi, Rear 32 psi
Inspect suspension for oil leaks regularly
Lubricate swingarm pivot every 6,000 miles

Brake System

Front Brakes: Dual hydraulic disc, 267mm diameter. Rear Brake: Single hydraulic disc, 245mm diameter. Brake Fluid: DOT 4.

Check brake pad thickness every 3,000 miles
Inspect brake lines for cracks or wear
Bleed brake system every 2 years or if spongy feel
Replace brake fluid every 2 years

CAUTION! Test brakes at low speed after service. Never reuse brake fluid.

Fuel System

Carburetors: Four Mikuni BS34SS constant velocity. Fuel Pump: Mechanical. Fuel Filter: In-line type, replace every 12,000 miles.

Clean carburetors every 12,000 miles
Sync carburetors after service or poor performance
Use fresh gasoline, avoid ethanol blends when possible
Drain fuel system for long-term storage

Lubrication

Engine Oil: SAE 10W-40. Chain Lubricant: Specific motorcycle chain lube. Grease Points: Swingarm pivot, steering head bearings, wheel bearings.

Tip: Warm engine before oil change for complete drainage. Check oil level with motorcycle upright.

Troubleshooting

Symptom	Possible Cause	Corrective Action
Engine won't start	Battery, spark, fuel	Check battery voltage; inspect spark plugs; verify fuel flow
Poor idle	Carburetor sync, air filter	Sync carburetors; clean/replace air filter
Overheating	Coolant, thermostat	Check coolant level; test thermostat operation
Electrical failure	Fuses, battery	Check all fuses; test battery and charging system
Brake drag	Calipers, fluid	Clean calipers; bleed brake system

Emergency: Carry basic tools and owner's manual during rides.

Service Information

Torque Specifications: Cylinder head bolts 25 ft-lbs, axle nuts 65 ft-lbs, spark plugs 13 ft-lbs. Service Intervals: Follow maintenance schedule strictly. Warranty: 12 months unlimited mileage. For technical support, contact authorized Yamaha dealership or Yamaha Motor Corporation at (800) 962-7926.

Parts: Use genuine Yamaha parts for optimal performance and reliability.