1986 Yamaha FZ750 Manual

The 1986 Yamaha FZ750 is a revolutionary sport motorcycle featuring a 749cc liquid-cooled, 20-valve, inline-four engine with a 5-valve-per-cylinder design, forward-inclined cylinder layout, and EXUP exhaust system. This manual covers technical specifications, maintenance procedures, operating instructions, troubleshooting, and service information for proper ownership and operation of this iconic sport bike.

Technical Specifications

Complete technical data for the 1986 Yamaha FZ750 motorcycle.

Features Overview

Innovative engineering features that made the FZ750 a benchmark in sport motorcycle design.

Pre-Ride Inspection

Essential safety checks before every ride.

1. Check fuel level and ensure adequate supply for intended journey.
2. Inspect tires for proper pressure and any signs of damage or wear.
3. Test front and rear brakes for proper operation and lever feel.
4. Check chain tension and lubrication (20-30mm free play recommended).
5. Verify all lights are functioning: headlight, brake light, turn signals.
6. Check engine oil level with motorcycle on center stand on level surface.
7. Ensure throttle moves freely and returns automatically.
8. Check clutch and brake lever free play (2-3mm recommended).

WARNING! Never operate motorcycle with known mechanical issues. Always wear appropriate protective gear.

Operating Instructions

Proper starting, riding, and shutdown procedures.

1. Starting Procedure: Turn fuel petcock to ON, ensure kill switch is in RUN position, pull choke for cold starts, turn ignition key, press starter button.
2. Warm-up: Allow engine to reach operating temperature before riding (2-3 minutes).
3. Shifting: Use clutch lever fully when shifting gears. Pattern: 1-down, 5-up.
4. Braking: Use both front and rear brakes together for maximum stopping power.
5. Cornering: Look through turns, maintain smooth throttle control, and proper body position.
6. Shutdown: Allow engine to idle briefly before turning off, turn fuel petcock to OFF if storing.

CAUTION! Engine break-in period: Vary engine speed and avoid full throttle for first 1000 miles.

Maintenance Schedule

Regular maintenance intervals for optimal performance and longevity.

• Every 600 miles/1000 km: Check chain adjustment and lubrication, check tire pressure, inspect brakes
• Every 3000 miles/5000 km: Change engine oil and filter, check valve clearances, inspect spark plugs
• Every 6000 miles/10000 km: Replace air filter, check carburetor synchronization, inspect wheel bearings
• Every 12000 miles/20000 km: Replace spark plugs, check ignition timing, inspect clutch plates
• Annual: Change brake fluid, check suspension components, inspect all electrical connections
• As needed: Replace tires when worn to wear indicators, replace chain and sprockets when stretched

Engine Service

Detailed engine maintenance procedures.

1. Oil Change: Warm engine, drain oil, replace filter, refill with 3.7 liters of 10W-40 motorcycle oil.
2. Valve Clearance: Intake: 0.10-0.15mm, Exhaust: 0.15-0.20mm. Check when engine is cold.
3. Carburetor Sync: Use vacuum gauges to balance carburetors at 1100-1300 RPM.
4. Spark Plugs: NGK DR8ES-L, gap: 0.7-0.8mm. Replace every 12,000 miles.
5. Cooling System: Check coolant level, replace every 2 years with 50/50 ethylene glycol mix.
6. Compression Test: Should read 142-171 psi with throttle wide open.

WARNING! Engine components become extremely hot during operation. Allow sufficient cooling time before servicing.

Chassis & Suspension

Frame, suspension, and brake system maintenance.

1. Chain Adjustment: 20-30mm free play at midpoint between sprockets. Lubricate every 300 miles.
2. Front Fork: Check oil level (468ml per leg, 10W oil), inspect seals for leaks.
3. Rear Shock: Adjust preload via ring collar. Replace if oil leaking or damping ineffective.
4. Brake Pads: Replace when thickness reaches 1.0mm. Use only Yamaha genuine parts.
5. Brake Fluid: DOT 4, replace every 2 years. Bleed system if spongy feel or contamination.
6. Wheel Bearings: Check for play or roughness. Replace if damaged.
7. Steering Head: Check for play, adjust as needed. Lubricate bearings annually.

Electrical System

Battery, charging, and ignition system maintenance.

Troubleshooting

Common issues and solutions for the FZ750.

Safety Information

Critical safety information for motorcycle operation.

1. Always wear DOT-approved helmet, eye protection, gloves, jacket, and sturdy footwear.
2. Never operate under influence of alcohol, drugs, or medications that impair ability.
3. Maintain safe following distance (2-second minimum) and increased distance in poor conditions.
4. Be visible: Use headlight at all times, wear reflective clothing at night.
5. Scan road surface for hazards: gravel, oil, debris, potholes, and railroad tracks.
6. Practice emergency braking and swerving maneuvers in safe, controlled environment.
7. Never carry passengers until thoroughly familiar with motorcycle operation.
8. Check local laws and complete motorcycle safety course for proper training.

WARNING! Motorcycles offer less protection than cars in collision. Ride defensively and assume you are not seen by other drivers.

Warranty & Support

Yamaha Motor Corporation warranty information and customer support.

Limited Warranty: 12 months unlimited mileage from date of purchase. Covers defects in materials and workmanship. Normal maintenance, adjustments, and wear items excluded.

Emission Control System Warranty: 5 years/18,750 miles for emissions-related components.

Contact Information: Yamaha Motor Corporation, USA, 6555 Katella Avenue, Cypress, CA 90630. Customer Relations: 1-800-962-7926. Technical Support available through authorized Yamaha dealers.

Parts & Service: Use only genuine Yamaha parts and authorized service centers to maintain warranty coverage and ensure proper performance.