USA Motorcycling

When you're maintaining your Harley Davidson, choosing the right brake fluid is essential for both safety and performance. The five best options on the market, including Johnsens 7012-6 Silicone DOT-5 and Maxima Racing USA DOT 4, each bring something unique to the table, from high boiling points to moisture resistance. Understanding these products can make a significant difference in your ride's reliability. But how do you know which one truly suits your bike's needs? Let's explore the features and what sets them apart so you can make an informed decision.

Quick Takeaways

• DOT 5 brake fluid is recommended for Harley Davidson, being non-hygroscopic and suitable for high temperatures up to 500°F.
• Johnsens 7012-6 Silicone DOT-5 Brake Fluid is highly rated for its performance and compatibility with various Harley models.
• Maxima Racing USA's DOT 4 Standard Brake Fluid offers corrosion resistance with a dry boiling point of 469°F.
• Bel-Ray Silicone DOT 5 Brake Fluid provides fade-free performance and does not damage brake system components.
• Regular fluid assessments and compatibility checks are essential to maintain braking safety and performance.

Johnsens 7012-6 Silicone DOT-5 Brake Fluid – 12 oz.

For Harley Davidson owners looking for reliable brake fluid, Johnsens 7012-6 Silicone DOT-5 Brake Fluid is an excellent choice. This specially formulated hydraulic brake fluid is non-hygroscopic, absorbing less than one percent of water, making it perfect for both drum and disc brakes. It's important to mention that DOT 5 is incompatible with DOT 3 and DOT 4 fluids, so users must verify their systems specifically require DOT 5. With a performance protection threshold of up to 500°F, it guarantees reliability under high temperatures. Customers have expressed satisfaction, particularly when replacing old brake fluid in models like the 1986 Harley. Available through platforms like Amazon, it's praised for its quality, distinctive purple color, and value for money.

Best For: Harley Davidson owners who require reliable and high-performance brake fluid specifically designed for their braking systems.

Pros:

• Superior performance with protection up to 500°F, ensuring reliability under high temperatures.
• Non-hygroscopic formulation absorbs less than one percent of water, ideal for both drum and disc brakes.
• Positive customer feedback, particularly for compatibility with classic models like the 1986 Harley.

Cons:

• Incompatibility with other DOT fluids (DOT 3 and DOT 4) may limit usage in mixed systems.
• Some concerns regarding packaging, although customers reported no leaks during shipping.
• Availability may be limited in local stores, requiring online purchase through platforms like Amazon.

DOT 4 Standard Brake Fluid

DOT 4 Standard Brake Fluid is an excellent choice for motorcycle enthusiasts seeking reliable and high-performance stopping power. Manufactured by Maxima Racing USA, this high-quality fluid offers a liquid volume of 16.9 fluid ounces, with dimensions of 4.72 x 1.57 x 7.48 inches. Its advanced chemistry resists corrosion and oxidation while being compatible with various rubbers. Featuring an anti-vapor lock formulation, it effectively combats water contamination, ensuring consistent performance. With impressive boiling points—dry at 469°F and wet at 318°F—it exceeds the requirements of US FMVSS 116 DOT 3 & DOT 4 standards. Customer reviews consistently praise its quality and effectiveness, earning a 4.8 out of 5 stars. DOT 4 Standard Brake Fluid is ideal for both maintenance and performance enhancement.

Best For: DOT 4 Standard Brake Fluid is best for motorcycle enthusiasts and performance drivers seeking reliable and high-performance braking solutions.

Pros:

• Advanced chemistry that resists corrosion and oxidation, enhancing longevity and reliability.
• High boiling points (Dry: 469°F, Wet: 318°F) ensure effective performance under extreme conditions.
• Highly rated with 4.8 out of 5 stars from customers for quality and effectiveness.

Cons:

• Vehicle specific fit may limit compatibility with some models.
• Limited liquid volume of 16.9 fluid ounces might not be sufficient for larger brake system services.
• Price point may be higher compared to standard brake fluids.

Brake Fluid Liquid Tester Pen for Car Accessories

The Brake Fluid Liquid Tester Pen is an essential tool for Harley Davidson owners who want to guarantee their brake fluid remains in peak condition. This device measures moisture content in DOT 3, DOT 4, and DOT 5.1 brake fluids, providing accurate metrics to 1% in just seconds. Its nickel-plated metal probe resists oil and oxidation, ensuring longevity. With five LED indicators, users can quickly assess brake fluid health, prompting timely replacements to avoid accidents. Compact and easy to carry, it automatically shuts down after 20 seconds to conserve battery life. Rated 4.2 out of 5 stars, this tester is a reliable accessory for personal or professional use, enhancing safety and performance on the road.

Best For: The Brake Fluid Liquid Tester Pen is best for car enthusiasts and mechanics who prioritize vehicle safety and maintenance.

Pros:

• Accurate moisture measurement with results available in seconds.
• Durable construction featuring a nickel-plated probe and skid-resistant casing.
• Compact design allows for easy portability and storage.

Cons:

• Battery not included, requiring an additional purchase.
• Customer concerns regarding long-term durability.
• Limited to specific brake fluid types, which may not suit all vehicles.

Johnsens 5012 Premium Synthetic DOT-4 Brake Fluid – 12 oz.

Motorcyclists seeking a reliable brake fluid will find Johnsen's 5012 Premium Synthetic DOT-4 Brake Fluid an excellent choice for their Harley Davidson. This 12 oz synthetic brake fluid is designed for disc, drum, and ABS brake systems, exceeding both DOT 3 and DOT 4 requirements. Its formulation incorporates special ingredients that prevent vapor lock and moisture absorption, ensuring consistent performance. Users praise its effectiveness in improving braking performance and compatibility with DOT 3 fluids. With a solid customer rating of 4.7 out of 5 stars and a rank of #14 in brake fluids on Amazon, Johnsen's 5012 stands out for both quality and value. It's a trustworthy option for those maintaining their motorcycle brake systems.

Best For: Motorcyclists looking for a high-quality brake fluid that enhances braking performance and is compatible with various brake systems.

Pros:

• Exceeds DOT 3 and DOT 4 requirements, ensuring superior performance.
• Special formulation prevents vapor lock and moisture absorption, promoting reliability.
• Highly rated by customers with an average of 4.7 out of 5 stars for effectiveness.

Cons:

• 12 oz volume may not be sufficient for larger or multiple brake system flushes.
• Synthetic fluid may not be compatible with all older brake systems, requiring verification.
• Limited availability in some regions, potentially impacting accessibility for some users.

Bel-Ray Silicone DOT 5 Brake Fluid – 12oz. 99450-B355W (1)

For riders seeking reliable performance from their brake systems, Bel-Ray Silicone DOT 5 Brake Fluid is an excellent choice. This 12oz fluid, part number 99450-B355W, is specifically designed to mix with other fluids meeting DOT 5 specifications, making it perfect for hydraulic brake systems and clutches. With a dry boiling point of 500°F and a wet boiling point of 365°F, it guarantees fade-free performance in both high and low temperatures. Riders appreciate its non-corrosive nature, as it won't damage paint and doesn't absorb moisture. Rated 4.7 out of 5 stars from 245 reviews, Bel-Ray's brake fluid stands out for its visibility during flushing and compatibility with various motorcycle models, making it a top choice for safety and performance.

Best For: Riders looking for a reliable and high-performance brake fluid for their hydraulic brake systems and clutches.

Pros:

• Exceeds high-performance standards with dry and wet boiling points of 500°F and 365°F, respectively.
• Non-corrosive formula that won't damage paint and does not absorb moisture.
• Highly rated by users with a 4.7 out of 5 stars from 245 reviews, praised for visibility during flushing.

Cons:

• Not compatible with DOT 3 or DOT 4 brake fluids, limiting its use in certain systems.
• Requires careful application to avoid damage to brake seals and hoses if incorrectly used.
• Limited availability may affect accessibility for some consumers.

Factors to Consider When Choosing Harley Davidson Brake Fluids

When you're choosing brake fluids for your Harley Davidson, you need to take into account several important factors. Compatibility with your brake system, moisture absorption properties, and boiling point performance are key to ensuring safety and reliability. Don't forget to check the fluid type requirements and the brand's reputation to make an informed decision.

Compatibility With Brake Systems

Choosing the right brake fluid for your Harley Davidson is imperative for maintaining the integrity of your brake system. Brake fluids are categorized by DOT ratings, such as DOT 3, DOT 4, and DOT 5. It's essential to use the specific type recommended by your manufacturer to avoid damaging your brake system. For instance, DOT 5 brake fluid is silicone-based and not compatible with DOT 3 or DOT 4 fluids. Mixing these can lead to brake failure, which you definitely want to avoid.

If your Harley requires DOT 5 fluid, you must exclusively use this type due to its non-hygroscopic properties. This means it doesn't absorb moisture, ensuring consistent performance. On the other hand, DOT 4 fluids are suitable for systems that need a higher boiling point than DOT 3, performing well under high temperatures. However, keep in mind that they can absorb moisture over time, potentially leading to vapor lock.

Always check your vehicle's owner manual or service guide to determine the correct brake fluid specification needed for peak performance and safety in your brake system. Making the right choice here is crucial for a smooth and safe ride.

Moisture Absorption Properties

Understanding moisture absorption properties is essential for selecting the right brake fluid for your Harley Davidson. Brake fluids fall into two categories: hygroscopic and non-hygroscopic. DOT 3 and DOT 4 fluids are hygroscopic, meaning they absorb moisture over time. This absorption can decrease the boiling point, risking brake performance and safety. If you use these fluids, you must regularly check and replace them to prevent issues like vapor lock, which can occur when water vaporizes and creates gas bubbles in the hydraulic system.

On the other hand, DOT 5 fluids are non-hygroscopic, absorbing less than one percent of water by weight. This makes them ideal for high-performance applications, as they maintain their effectiveness even in challenging conditions. Choosing non-hygroscopic fluids can help you avoid moisture-related problems, such as corrosion and degradation of brake components, ultimately enhancing the longevity and reliability of your braking system.

Boiling Point Performance

Moisture absorption not only affects the integrity of brake fluid but also directly impacts its boiling point performance. The boiling point of your brake fluid is critical; it determines how well the fluid can withstand high temperatures without vaporizing. If the fluid vaporizes, you risk experiencing brake failure.

Silicone DOT-5 brake fluids shine in this area, boasting a dry boiling point of up to 500°F, making them excellent for extreme conditions. On the other hand, DOT-4 fluids have lower boiling points, around 469°F dry and only 318°F when wet. This can make them less suitable for high-performance applications, particularly if you push your bike to its limits.

Maintaining a higher boiling point in your brake fluid is necessary for preventing vapor lock. This is essential for consistent braking performance, especially in high-stress situations like racing or carrying heavy loads. To keep your brake fluid performing at its best, regularly check and replace it. Doing so helps guarantee the boiling point stays within safe limits, reducing risks associated with moisture absorption and degradation over time. Your safety depends on it!

Fluid Type Requirements

When it comes to selecting brake fluid for your Harley Davidson, the right choice can make all the difference in performance and safety. Your bike typically requires DOT 5 silicone brake fluid, which is non-hygroscopic and absorbs less than one percent by weight of water. This property makes it ideal for maintaining your bike's brake system.

Using DOT 5 is vital, as it's not compatible with other types like DOT 3 or DOT 4. Mixing these fluids can damage your brake system components, leading to costly repairs. DOT 5 can withstand high temperatures, offering protection up to 500°F, guaranteeing reliable performance even during demanding rides.

Selecting the correct fluid type is essential for maintaining the integrity and functionality of Harley Davidson's hydraulic brake systems, especially for models specifically designed for DOT 5. The unique properties of DOT 5 fluid, including its moisture prevention abilities, contribute to longer service intervals and improved braking performance. Always double-check your owner's manual or consult a professional to verify you're using the right fluid for your Harley. Your safety and performance depend on it!

Brand Reputation and Trust

Choosing the right brake fluid for your Harley Davidson isn't just a matter of picking any bottle off the shelf; it's about trusting a brand that stands behind its products. A reputable brand guarantees reliability and safety, as established names often have a proven history of quality and performance. When selecting, pay attention to customer ratings and reviews. Higher ratings typically indicate consistent user satisfaction and effective performance, giving you added peace of mind.

Look for manufacturers with a long-standing presence in the automotive industry. These brands invest in research and development, resulting in more advanced and reliable formulations. Additionally, check if the brand complies with industry standards and certifications, such as FMVSS and SAE. Compliance means their products meet safety and performance benchmarks, which is vital for your ride's safety.

Packaging and Handling Concerns

Ensuring the integrity of the brake fluid packaging is fundamental for maintaining performance in your Harley Davidson. When you select brake fluids, check that the packaging remains intact during shipping. This is essential to prevent contamination or leaks, as fluid integrity directly affects performance.

Look for durable materials that can withstand temperature variations and physical impacts. This helps avoid degradation of the brake fluid inside. Before using any fluid, inspect the packaging for signs of tampering or damage. Compromised packaging might expose the fluid to moisture and impurities, risking your bike's braking system.

Consider the size of the container as well. Larger volumes may be more economical, but they can create handling challenges if you need to transfer the fluid to smaller reservoirs. Proper labeling on the packaging is also critical. It prevents mix-ups between different types of brake fluids, ensuring you use the correct one for your Harley. Using an incompatible fluid can cause significant damage to your bike's brake system. By focusing on packaging and handling, you can protect your Harley's performance and safety on the road.

Common Questions

Can I Mix Different Types of Brake Fluid?

Mixing different types of brake fluid isn't advisable. Each type has unique properties and chemical compositions, which can lead to reduced performance or even damage to your braking system. If you need to top off your brake fluid, stick to the same type as what's already in your system. Always check your owner's manual for the recommended brake fluid type, and when in doubt, consult a professional to guarantee your safety on the road.

How Often Should I Change My Brake Fluid?

You should change your brake fluid every one to two years, depending on your riding habits and the manufacturer's recommendations. Regularly checking your fluid can prevent moisture buildup, which can compromise braking performance. If you ride frequently or in harsh conditions, consider changing it more often. Always keep an eye on the fluid level and clarity to guarantee your brakes function at their best. Staying proactive will help keep your ride safe and smooth.

What's the Difference Between DOT 3 and DOT 4 Fluids?

Think of brake fluid as the lifeblood of your bike's braking system. DOT 3 and DOT 4 fluids differ mainly in their boiling points. DOT 3 typically has a lower boiling point, making it suitable for standard use. DOT 4, on the other hand, has a higher boiling point, providing better performance under heavy braking conditions. If you often ride hard or in demanding situations, you'll want to opt for DOT 4 to guarantee peak safety and reliability.

Is Silicone Brake Fluid Compatible With My Harley Davidson?

Silicone brake fluid isn't typically recommended for your Harley Davidson. While it offers some benefits, like being less hygroscopic, it can cause issues with compatibility and performance. Most manufacturers, including Harley, specify using DOT 3 or DOT 4 fluids. If you're considering a switch, make sure to check your owner's manual and consult with a professional. Sticking with the recommended fluids guarantees peak safety and performance on your rides.

Can Old Brake Fluid Affect Braking Performance?

Old brake fluid can be like a rusty chain, slowing you down when you need to stop. It absorbs moisture over time, which can lead to reduced braking performance and even corrosion in your system. If your bike's been sitting, that fluid's probably past its prime. Regularly checking and changing your brake fluid keeps your ride safe and responsive. Don't let old fluid compromise your stopping power; it's worth the effort.

Wrapping Up

In summary, choosing the right brake fluid for your Harley Davidson is essential for your safety and performance on the road. With options like Johnsens 7012-6 Silicone DOT-5 and Maxima Racing USA DOT 4, you've got great choices to suit your needs. So, why settle for anything less than the best to keep your ride smooth and reliable? Make the right selection, and enjoy every mile with confidence!