The Honda Pacific Coast, affectionately nicknamed the "Tupperware Motorcycle" for its extensive bodywork, was a unique and ambitious machine. Designed for comfortable long-distance touring, it offered weather protection and storage unmatched by many bikes of its era. However, beneath that sleek, futuristic (for the late 80s) exterior, lay a few potential pitfalls that prospective owners – and current riders – should be aware of. While generally reliable, the PC800, produced from 1989 to 1998, does have some known issues that can crop up with age and mileage, requiring careful attention and preventative maintenance.

So, What's the Catch with this Tupperware Tourer?

While the Pacific Coast enjoys a reputation for dependability, time takes its toll on even the best-engineered machines. Let's dive into some of the common problems that PC800 owners may encounter:

1. The Dreaded Fuel Pump:

Without a doubt, the fuel pump is the most frequently cited problem area for the PC800. The original fuel pumps are known for failing, often due to the ethanol content in modern gasoline degrading the internal components. Symptoms of a failing fuel pump include:

  • Difficulty starting, especially when the engine is hot.
  • Hesitation or stumbling during acceleration.
  • Complete engine stall.
  • A noticeable decrease in fuel efficiency.

The Fix: Fortunately, this is a well-documented issue, and aftermarket fuel pumps are readily available. Many owners opt for a pump specifically designed to withstand ethanol-blended fuels. Replacing the fuel pump is a relatively straightforward job for a mechanically inclined individual, although access can be a little tight due to the bike's bodywork.

2. Carburetor Clogging and Synchronization:

The PC800 utilizes two Keihin CV (constant velocity) carburetors. Over time, these carbs can become clogged with deposits, especially if the bike sits for extended periods. This can lead to:

  • Rough idling.
  • Poor throttle response.
  • Uneven cylinder firing.
  • Difficulty starting.

Furthermore, the carburetors need to be synchronized to ensure they are working together harmoniously. Out-of-sync carbs can cause vibrations, reduced performance, and poor fuel economy.

The Fix: A thorough carburetor cleaning and rebuild is often necessary to address clogging issues. This involves disassembling the carburetors, cleaning all the jets and passages, and replacing worn components like gaskets and O-rings. Carburetor synchronization requires specialized tools (vacuum gauges) and some mechanical expertise. If you're not comfortable working on carburetors, it's best to take the bike to a qualified mechanic.

3. Cooling System Concerns:

The PC800 is liquid-cooled, and a properly functioning cooling system is crucial for preventing overheating. Common cooling system problems include:

  • Leaking coolant hoses: Rubber hoses can degrade and crack over time, leading to coolant leaks.
  • A faulty thermostat: A stuck thermostat can prevent the engine from reaching its optimal operating temperature or, conversely, cause it to overheat.
  • A clogged radiator: Debris and corrosion can accumulate in the radiator, reducing its cooling efficiency.
  • A failing water pump: While less common, the water pump can fail, leading to inadequate coolant circulation.

The Fix: Regularly inspect the coolant hoses for cracks and leaks and replace them as needed. Flush the cooling system every two years to remove deposits and prevent corrosion. A thermostat is a relatively inexpensive and easy-to-replace item. Radiator cleaning can be done professionally or, with care, at home. Water pump replacement is a more involved task.

4. Charging System Weaknesses:

The PC800's charging system, consisting of the alternator (or stator), rectifier/regulator, and battery, can be susceptible to problems as the bike ages. Symptoms of a charging system issue include:

  • A weak or dead battery.
  • Dimming headlights.
  • Difficulty starting.

The Fix: Start by checking the battery's voltage and condition. A load test can determine if the battery is holding a charge. If the battery is good, test the stator's output voltage and the rectifier/regulator's charging voltage. A faulty stator or rectifier/regulator will need to be replaced. Keep in mind that the stator is located under the engine side cover and requires removing the cover to replace it.

5. The Infamous Bodywork (and its Rattles):

While the PC800's bodywork is a defining feature, it can also be a source of frustration. The plastic panels are prone to cracking and breaking, especially around the mounting points. Additionally, the bodywork can develop rattles and squeaks over time, particularly if the mounting hardware is loose or missing.

The Fix: Carefully inspect the bodywork for cracks and breaks. Minor cracks can sometimes be repaired with plastic welding techniques. Replacing damaged panels can be expensive, as used parts are often the only option. To reduce rattles, ensure that all mounting hardware is present and tightened to the correct torque specifications. Adding rubber washers or shims can also help to dampen vibrations.

6. Final Drive Issues:

The PC800 uses a shaft final drive, which is generally reliable. However, problems can occur with the U-joints and the final drive fluid.

  • Worn U-joints can cause vibrations and clunking noises.
  • Contaminated or low final drive fluid can lead to premature wear and failure.

The Fix: Regularly inspect the U-joints for play and excessive wear. Replace them if necessary. Change the final drive fluid every 12,000 miles (or as recommended in the owner's manual) using the correct type of gear oil.

7. Brake System Maintenance:

Like any motorcycle, the PC800's brake system requires regular maintenance. Common problems include:

  • Worn brake pads: Brake pads wear down over time and need to be replaced.
  • Sticking brake calipers: Calipers can become sticky due to corrosion and debris, leading to uneven brake wear and reduced braking performance.
  • A spongy brake lever: This can be caused by air in the brake lines or a failing master cylinder.

The Fix: Inspect the brake pads regularly and replace them when they are worn. Clean and lubricate the brake calipers periodically to prevent sticking. Bleed the brake lines to remove air and replace the brake fluid every two years. A failing master cylinder may need to be rebuilt or replaced.

8. Electrical Gremlins:

Older motorcycles are often prone to electrical problems, and the PC800 is no exception. Common electrical issues include:

  • Corroded connectors: Corrosion can build up on electrical connectors, causing poor connections and intermittent problems.
  • Broken or frayed wires: Wires can become brittle and break or fray over time, especially in areas that are exposed to heat or vibration.
  • Faulty switches: Switches can fail due to wear and tear or corrosion.

The Fix: Inspect the electrical system for corroded connectors, broken wires, and faulty switches. Clean corroded connectors with a wire brush or electrical contact cleaner. Repair or replace broken wires. Replace faulty switches. Dielectric grease can help to prevent corrosion.

Frequently Asked Questions About Honda Pacific Coast Problems

  • Why does my Pacific Coast run rough when it's hot? This is often a sign of a failing fuel pump. The pump struggles to deliver fuel when it gets hot.

  • How often should I change the final drive oil? It's recommended to change the final drive oil every 12,000 miles or every two years, whichever comes first.

  • My Pacific Coast's bodywork rattles a lot. What can I do? Ensure all mounting hardware is present and tightened. Adding rubber washers can also help.

  • Where can I find replacement parts for my PC800? Used parts are available from online marketplaces and salvage yards. Some aftermarket parts are also available.

  • Is the PC800 a difficult bike to work on? Some tasks, like removing the bodywork, can be time-consuming. However, many repairs are relatively straightforward.

The Bottom Line

The Honda Pacific Coast is a unique and capable motorcycle that offers a comfortable and enjoyable riding experience. While it does have some potential problems, most of these are well-documented and can be addressed with proper maintenance and care. By being aware of these issues and taking preventative measures, you can keep your PC800 running smoothly for many years to come. So, embrace the "Tupperware" and enjoy the ride!