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WD40 on Motorcycle Chain: The Truth, Myths, and Alternatives

The question of whether to use WD40 on a motorcycle chain is a hotly debated topic among riders. Some swear by it, while others vehemently advise against it. Understanding the properties of WD40 and the specific needs of a motorcycle chain is crucial before making a decision. This article aims to provide a comprehensive, fact-checked analysis of using WD40 on motorcycle chains, exploring the potential benefits, risks, and superior alternatives.

Understanding Motorcycle Chain Lubrication

A motorcycle chain is a critical component of the drivetrain, responsible for transferring power from the engine to the rear wheel. It operates under significant stress, exposed to dirt, grime, water, and extreme temperatures. Proper lubrication is essential for extending the chain’s lifespan, ensuring smooth operation, and preventing premature wear. Motorcycle chain lubricants are specifically formulated to:

Reduce friction between the chain’s moving parts (rollers, pins, and plates).
Protect against rust and corrosion.
Wash away dirt and debris.
Provide a protective barrier against the elements.

The best motorcycle chain lubricants are typically thick, viscous fluids that adhere well to the chain and resist being flung off at high speeds. They also contain additives that enhance their lubricating and protective properties.

What is WD40?

WD40, short for Water Displacement, 40th formula, is a versatile multi-purpose product. Its primary function is to displace moisture and prevent rust. It’s also used as a penetrating oil, cleaner, and light lubricant. WD40 is composed of various petroleum-based solvents, mineral oil, and other ingredients. While effective for many applications, its lubricating properties are relatively short-lived compared to dedicated lubricants.

The Debate: WD40 on Motorcycle Chains

The core of the debate lies in WD40’s lubricating properties versus its cleaning abilities. Proponents argue that WD40 can be used to clean a motorcycle chain, removing dirt, grime, and old lubricant. They also suggest that it provides some level of lubrication, albeit temporary. Opponents argue that WD40 is too thin and evaporates too quickly to provide adequate long-term lubrication for a motorcycle chain. They also claim that it can dissolve the grease inside sealed chains (O-ring, X-ring, Z-ring chains), leading to premature failure.

Arguments for Using WD40 on a Motorcycle Chain

Cleaning: WD40 is an effective cleaner, capable of removing dirt, grease, and grime from a motorcycle chain.
Rust Prevention: WD40 helps prevent rust and corrosion by displacing moisture.
Penetrating Oil: WD40 can help loosen stiff or seized chain links.

Arguments Against Using WD40 on a Motorcycle Chain

Poor Lubrication: WD40 provides only temporary lubrication and evaporates quickly, leaving the chain vulnerable to wear.
O-Ring Damage: WD40 can potentially damage the O-rings, X-rings, or Z-rings in sealed motorcycle chains, leading to grease leakage and chain failure.
Attracts Dirt: WD40 can leave a sticky residue that attracts dirt and grime, accelerating chain wear.

Expert Opinions and Research

Numerous motorcycle mechanics and industry experts advise against using WD40 as a primary lubricant for motorcycle chains. They emphasize that its lubricating properties are insufficient for the demanding conditions a chain experiences. Many independent tests and reviews corroborate these claims, demonstrating that chains lubricated solely with WD40 wear out much faster than those treated with dedicated chain lubricants. [See also: Motorcycle Chain Maintenance Best Practices]

While WD40 can be used as a cleaner, it’s crucial to follow up with a proper chain lubricant to ensure adequate protection and longevity. Some manufacturers even explicitly warn against using WD40 on their chains.

The Correct Way to Clean and Lubricate a Motorcycle Chain

Maintaining a motorcycle chain involves both cleaning and lubrication. Here’s a step-by-step guide to properly caring for your chain:

Cleaning: Use a dedicated motorcycle chain cleaner or kerosene to remove dirt, grease, and grime. Avoid using harsh solvents like gasoline or brake cleaner, as these can damage the O-rings.
Brushing: Use a chain brush to scrub the chain thoroughly, removing stubborn deposits.
Rinsing: Rinse the chain with clean water to remove any remaining cleaner.
Drying: Allow the chain to dry completely before lubricating. You can use compressed air to speed up the drying process.
Lubricating: Apply a high-quality motorcycle chain lubricant evenly along the entire length of the chain.
Wiping: Wipe off any excess lubricant to prevent it from attracting dirt.

It’s recommended to clean and lubricate your motorcycle chain every 300-600 miles, or more frequently if riding in wet or dusty conditions.

Alternatives to WD40 for Motorcycle Chain Lubrication

Several excellent alternatives to WD40 are specifically designed for motorcycle chain lubrication. These products offer superior protection, longevity, and performance:

Chain Lube (Wax-Based): Wax-based lubricants create a dry, protective coating that resists dirt and grime buildup. They are ideal for riders who frequently ride in dusty conditions.
Chain Lube (Synthetic): Synthetic lubricants offer excellent wear protection, high-temperature performance, and resistance to water washout. They are suitable for a wide range of riding conditions.
Chain Lube (PTFE-Based): PTFE (Teflon) based lubricants provide excellent friction reduction and are resistant to extreme temperatures and chemicals.
Chain Oil: Traditional chain oil is still a viable option, but requires more frequent application than modern chain lubes.

Choose a chain lubricant that is appropriate for your riding style and the conditions you typically encounter.

Specific Product Recommendations

While specific product recommendations can vary based on personal preference and availability, some popular and highly-rated motorcycle chain lubricants include:

Motul Chain Lube
Maxima Chain Wax
Bel-Ray Super Clean Chain Lube
PJ1 Blue Label Chain Lube

Always consult your motorcycle’s owner’s manual for specific recommendations regarding chain lubrication.

Conclusion: Use WD40 on Motorcycle Chain with Caution

While WD40 can be used as a cleaner for a motorcycle chain, it is not a suitable long-term lubricant. Its thin viscosity and rapid evaporation provide inadequate protection against wear and corrosion. Furthermore, it may damage the O-rings in sealed chains. For optimal chain health and longevity, use a dedicated motorcycle chain lubricant after cleaning. Regular cleaning and lubrication with appropriate products will significantly extend the life of your motorcycle chain and ensure smooth, reliable performance. Remember to always prioritize proper maintenance to keep your ride safe and enjoyable. [See also: Troubleshooting Common Motorcycle Problems]

In summary, while WD40 has its uses, lubricating your motorcycle chain isn’t one of them. Choose a product specifically designed for the task, and your chain (and your wallet) will thank you in the long run.