1988 Yamaha Virago 750 Manual

The 1988 Yamaha Virago 750 is a classic cruiser motorcycle featuring a 749cc V-twin engine, shaft drive system, air-cooled cooling, and distinctive cruiser styling. This manual covers essential information for maintenance, operation, troubleshooting, and specifications to ensure proper care and optimal performance of your motorcycle.

1. Features at a Glance 2. Pre-Ride Inspection 3. Basic Operation 4. Specifications 5. Controls and Instruments 6. Maintenance Schedule 7. Engine Service 8. Electrical System 9. Storage & Care 10. Safety Information 11. Troubleshooting

Features at a Glance

Key components: V-twin engine configuration, shaft final drive, cruiser styling, comprehensive instrumentation.

FeatureDescription
Engine Type749cc air-cooled 4-stroke V-twin
Bore x Stroke83.0 x 69.2mm
Compression Ratio9.0:1
Fuel SystemMikuni BS34SS carburetors
Ignition SystemTransistorized coil ignition
Transmission5-speed constant mesh
Final DriveShaft drive
Frame TypeDouble cradle steel frame
Suspension FrontTelescopic fork
Suspension RearDual shocks adjustable preload

Pre-Ride Inspection

Always perform pre-ride inspection for safety and reliability.

  1. Check fuel level: Ensure adequate fuel for intended journey.
  2. Inspect tires: Verify proper inflation pressure and tread condition.
  3. Test brakes: Check front and rear brake operation and fluid levels.
  4. Verify lights: Ensure headlight, brake light, and turn signals function properly.
  5. Check controls: Verify throttle, clutch, and brake lever operation.

WARNING! Never operate motorcycle without proper pre-ride inspection. Failure to inspect may result in accident or injury.

Basic Operation

Starting procedure and basic riding instructions.

  1. Starting engine: Turn fuel valve to ON, set choke for cold starts, turn ignition ON, pull clutch lever, press starter button.
  2. Shifting gears: Use clutch lever to disengage transmission, select appropriate gear, release clutch smoothly.
  3. Braking technique: Apply both front and rear brakes simultaneously for controlled stopping.
  4. Turning: Look through turns, countersteer for directional changes.

CAUTION! Always wear proper protective gear including helmet, gloves, and protective clothing.

Specifications

Controls and Instruments

Understanding motorcycle controls and instrument panel functions.

Right Handlebar: Front brake lever, starter button, engine kill switch, throttle grip.

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

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

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

Maintenance Schedule

Regular maintenance intervals for optimal performance and longevity.

  1. Every 600 miles/1,000 km: Check and adjust chain, check tire pressure, inspect brakes.
  2. Every 3,000 miles/5,000 km: Change engine oil and filter, check valve clearances.
  3. Every 6,000 miles/10,000 km: Replace spark plugs, check carburetor synchronization.
  4. Every 12,000 miles/20,000 km: Replace air filter, check wheel bearings.
  5. Seasonal: Check battery, change brake fluid, inspect tires for wear.

Tip: Keep detailed maintenance records for reference and resale value.

Engine Service

Basic engine maintenance procedures.

  1. Oil change: Warm engine, drain oil, replace filter, refill with recommended oil.
  2. Valve adjustment: Check clearances when engine is cold, adjust as necessary.
  3. Spark plug replacement: Remove old plugs, gap new plugs, install with proper torque.
  4. Carburetor maintenance: Clean and synchronize carburetors for optimal performance.
  5. Cooling system: Keep cooling fins clean for proper air cooling.

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

Electrical System

Electrical components and maintenance.

Battery: 12V 14Ah, maintain proper fluid levels, keep terminals clean.

Charging System: Three-phase AC generator with solid-state voltage regulator.

Lighting: 60/55W headlight, LED tail light, incandescent turn signals.

Storage & Care

Proper storage procedures for seasonal or long-term storage.

Add fuel stabilizer, run engine to circulate treated fuel, disconnect battery, inflate tires to maximum pressure, store in dry location covered with breathable cover.

CAUTION! Do not store with fuel in carburetors without stabilizer. Ethanol fuel can damage components during storage.

Safety Information

Always wear DOT-approved helmet, eye protection, gloves, long pants, sturdy boots, and reflective clothing. Never operate under influence of alcohol or drugs. Obey all traffic laws. Complete motorcycle safety course recommended.

Troubleshooting

SymptomPossible CauseCorrective Action
Engine won't startFuel, spark, or compression issueCheck fuel level, spark plugs, battery charge, kill switch position.
Poor idleCarburetor issuesClean carburetors, check for vacuum leaks, adjust idle mixture.
Electrical failureBattery or charging systemTest battery voltage, check connections, test stator output.
Brake problemsFluid or pad issuesCheck brake fluid level, inspect pads for wear, bleed system if spongy.
Transmission issuesClutch or gear problemsAdjust clutch cable, check transmission oil level.

Service: Contact authorized Yamaha dealer for complex repairs.

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

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