The Honda Deauville 650, known for its reliability and touring capability, has garnered a loyal following over the years. However, like any motorcycle, it's not without its quirks and potential issues. This article delves into common problems encountered by Deauville 650 owners, providing insights and solutions to help you keep your beloved machine running smoothly. Let's explore what you need to know to keep your Deauville on the road.

So, What Are the Most Common Deauville 650 Issues?

While the Deauville 650 enjoys a reputation for being a dependable workhorse, certain problems tend to surface more frequently than others. Knowing about these issues in advance can help you diagnose problems quickly and potentially prevent them from escalating.

  • Alternator Woes: This is arguably the most talked-about issue with the Deauville 650. The alternators on these bikes, particularly those from earlier years, can be prone to failure.
  • Regulator/Rectifier Problems: Closely linked to the alternator issue, a failing regulator/rectifier can lead to overcharging or undercharging of the battery, causing a cascade of electrical problems.
  • Fuel Pump Failure: While not as common as the alternator issue, the fuel pump can sometimes fail, leaving you stranded.
  • Sticking Throttle: Some owners have reported issues with the throttle sticking, which can be dangerous.
  • Corrosion Issues: Given its touring nature and exposure to the elements, corrosion can be a problem, particularly in electrical connectors and around the exhaust system.

Digging Deeper: The Dreaded Alternator Failure

Let's dive into the most notorious issue: the alternator. The alternator's job is to keep your battery charged while the engine is running. When it fails, your battery eventually drains, and the bike will stop running.

  • Why Does It Fail? The exact reason for the high failure rate is debated, but common theories include heat build-up due to poor ventilation around the alternator, and potential design flaws in the original component.
  • Symptoms of a Failing Alternator:
    • Dimming headlights, especially at lower RPMs.
    • Difficulty starting the bike, particularly when the engine is warm.
    • Battery losing charge quickly.
    • Error codes related to the charging system.
    • Complete electrical failure.
  • The Fix: The most common solution is to replace the alternator with a new or refurbished unit. Some owners opt for aftermarket alternators, which may offer improved reliability. Crucially, thoroughly check the wiring harness and connectors leading to the alternator for any signs of damage or corrosion, as these can contribute to premature failure.

Regulator/Rectifier: The Alternator's Partner in Crime

The regulator/rectifier (R/R) is another crucial component of the charging system. It converts the AC voltage produced by the alternator into DC voltage suitable for charging the battery and powering the bike's electrical components.

  • How It Fails: R/Rs often fail due to overheating. They are typically located in a position with limited airflow, and the heat generated by converting AC to DC can cause them to break down over time.
  • Symptoms of a Failing R/R:
    • Overcharging the battery (leading to a boiled battery).
    • Undercharging the battery (similar symptoms to a failing alternator).
    • Erratic voltage readings.
    • Burnt or melted connectors.
  • The Fix: Replacing the R/R is usually straightforward. Many owners upgrade to a MOSFET-type R/R, which is known for its improved efficiency and heat dissipation. Relocating the R/R to a position with better airflow can also significantly extend its lifespan. Consider using thermal paste between the R/R and its mounting surface to improve heat transfer.

Fuel Pump Issues: A Less Common, But Annoying Problem

While not as prevalent as charging system issues, fuel pump failures can occur on the Deauville 650. The fuel pump is responsible for delivering fuel from the tank to the engine.

  • Why It Fails: The fuel pump can fail due to age, contamination of the fuel system, or simply wear and tear.
  • Symptoms of a Failing Fuel Pump:
    • Difficulty starting the bike.
    • Stalling, particularly under acceleration.
    • Loss of power.
    • A buzzing or whining sound coming from the fuel tank (indicating the pump is struggling).
  • The Fix: The fuel pump can be replaced with a new or aftermarket unit. Before replacing the pump, check the fuel filter for blockage and the fuel lines for kinks or leaks. Sometimes, a simple cleaning of the fuel system can resolve the issue.

Sticking Throttle: A Safety Concern

A sticking throttle is a serious safety hazard. If the throttle doesn't return to its closed position smoothly, it can make it difficult to control the bike, especially in emergency situations.

  • Causes of a Sticking Throttle:
    • Dirty or corroded throttle cables.
    • Lack of lubrication in the throttle mechanism.
    • Damaged or worn throttle cables.
    • Obstruction in the throttle body.
  • The Fix:
    • Lubricate the throttle cables thoroughly using a cable lubricator.
    • Inspect the throttle cables for fraying or damage and replace them if necessary.
    • Clean the throttle body to remove any dirt or debris.
    • Ensure the throttle grip moves freely on the handlebar.

Corrosion: The Silent Enemy

Given the Deauville 650's touring focus, it's often exposed to rain, salt, and other corrosive elements. This can lead to corrosion, which can cause a variety of problems.

  • Common Corrosion Hotspots:
    • Electrical connectors: Corrosion in connectors can cause intermittent electrical problems.
    • Exhaust system: Rust on the exhaust system is common, especially in areas exposed to road salt.
    • Frame: Surface rust can develop on the frame, particularly in areas prone to stone chips.
    • Brake components: Corrosion can affect brake calipers and rotors, reducing braking performance.
  • Prevention and Treatment:
    • Regularly clean the bike to remove dirt and salt.
    • Apply ACF-50 or similar anti-corrosion spray to protect vulnerable areas.
    • Use dielectric grease on electrical connectors to prevent corrosion.
    • Address rust spots promptly with rust converters and touch-up paint.

Other Minor Annoyances to Watch Out For

While the issues listed above are the most common, here are a few other things to keep an eye on:

  • Clutch Problems: Clutch slippage or a heavy clutch lever can indicate worn clutch plates or a stretched clutch cable.
  • Brake Issues: Worn brake pads, spongy brake feel, or sticking calipers can compromise braking performance. Regularly inspect and maintain your brake system.
  • Cooling System: Check the coolant level regularly and inspect the hoses for leaks or cracks. Overheating can cause serious engine damage.
  • Headlight Bulbs: Some owners have reported that the headlight bulbs tend to blow frequently. Consider upgrading to more durable bulbs.

Frequently Asked Questions (FAQ)

  • Why does my Deauville 650 keep draining the battery? A likely cause is a failing alternator or regulator/rectifier. Have your charging system tested.
  • My Deauville 650 is stalling. What could be the problem? This could be due to a failing fuel pump, clogged fuel filter, or vacuum leak. Start by checking the fuel system.
  • How often should I change the oil on my Deauville 650? Honda recommends changing the oil every 8,000 kilometers (5,000 miles) or annually, whichever comes first.
  • What type of coolant should I use in my Deauville 650? Use a high-quality ethylene glycol-based coolant specifically designed for motorcycles.
  • Where is the regulator/rectifier located on the Deauville 650? It's typically located under the seat or near the rear subframe. Refer to your service manual for the exact location.

Conclusion

The Honda Deauville 650 is a fantastic motorcycle, but being aware of its potential problems is key to maintaining its reliability. By paying attention to the common issues discussed here, you can keep your Deauville running smoothly for many years to come. Regular maintenance and proactive troubleshooting will help you avoid costly repairs and enjoy worry-free riding.