The 1988 Honda Goldwing 1500 is a touring motorcycle featuring a 1520cc liquid-cooled horizontally opposed four-cylinder engine, shaft drive, comprehensive instrumentation, full fairing with integrated audio system, and advanced touring amenities. This service manual covers maintenance procedures, specifications, troubleshooting, and repair instructions for the GL1500 model. Below are key sections for technical specifications, maintenance schedules, engine service, electrical systems, chassis, and troubleshooting.
Key components: 1520cc flat-four engine, shaft final drive, hydraulic clutch, front and rear suspension systems, comprehensive electrical system with audio and touring features.
| Component | Description |
|---|---|
| Engine Type | Liquid-cooled 4-stroke SOHC horizontally opposed 4-cylinder |
| Displacement | 1520cc |
| Bore x Stroke | 71mm x 60mm |
| Compression Ratio | 9.8:1 |
| Fuel System | Dual CV carburetors |
| Ignition System | Transistorized electronic ignition |
| Starter System | Electric starter with automatic decompression |
| Transmission | 5-speed constant mesh with reverse |
| Final Drive | Shaft drive |
| Frame Type | Double-cradle steel frame |
Regular maintenance is essential for optimal performance and longevity.
WARNING! Always use genuine Honda parts and recommended fluids. Follow torque specifications precisely.
Engine maintenance procedures and specifications.
CAUTION! Engine must be cool before performing valve adjustment. Use proper torque sequence for cylinder head bolts.
Carburetor service and fuel system maintenance.
Tip: Always synchronize carburetors after any service work. Use factory specified jet sizes.
Complete electrical system specifications and service procedures.
| Component | Specification |
|---|---|
| Battery | 12V 20AH (YTX20L-BS) |
| Charging System | Three-phase AC generator, 490W @ 5000 rpm |
| Starter Motor | 12V 1.0 kW |
| Ignition Timing | 10° BTDC @ 1100 rpm (fixed advance) |
| Headlight | 12V 60/55W (halogen) |
| Fuse Box | Main 30A, Headlight 15A, Signal 10A, Ignition 10A |
WARNING! Disconnect battery before performing electrical work. Follow wiring diagrams precisely.
Frame, suspension, and steering components service.
CAUTION! Always use proper jack points when lifting motorcycle. Check all fasteners for proper torque.
Transmission service and final drive maintenance.
Tip: Change final drive oil every 8,000 miles. Check for drive shaft spline wear during service.
Hydraulic brake system service and specifications.
| Component | Specification |
|---|---|
| Front Brake | Dual hydraulic disc, 296mm |
| Rear Brake | Single hydraulic disc, 316mm |
| Brake Fluid | DOT 4 |
| Master Cylinder | Front: 5/8", Rear: 1/2" |
| Brake Pad Thickness | Replace when less than 0.08 in (2.0 mm) |
| Rotor Thickness | Front: 0.20 in (5.0 mm), Rear: 0.20 in (5.0 mm) |
WARNING! Always bleed brakes after service. Never reuse brake fluid.
Common issues and corrective actions for the GL1500.
| Symptom | Possible Cause | Corrective Action |
|---|---|---|
| Hard starting | Weak battery, dirty carbs | Check battery voltage; clean carburetors; verify choke operation |
| Poor idle | Vacuum leak, sync needed | Check vacuum lines; synchronize carburetors; adjust idle mixture |
| Electrical issues | Bad connections, stator | Check all connections; test stator output; verify regulator/rectifier |
| Transmission noise | Low oil, worn gears | Check oil level; inspect shift forks; examine gear teeth |
| Brake pulsation | Warped rotors | Measure rotor runout; replace if exceeds 0.006 in (0.15 mm) |
| Overheating | Low coolant, thermostat | Check coolant level; test thermostat; flush cooling system |
Service Note: Always refer to factory service manual for complex repairs.
Complete electrical schematics available in factory service manual. Key systems include:
Note: For detailed wiring diagrams, refer to Honda factory service manual or authorized dealer.
Technical Support: Contact authorized Honda dealer or Honda Customer Service for technical assistance.