Why the 1999 Honda Foreman 400 Spark Plug Is My Go-To for Reliable Performance: An Expert’s Perspective

When I first started working on my 1999 Honda Foreman 400, I quickly realized how crucial the spark plug is to keeping this rugged ATV running smoothly. That tiny component plays a big role in the engine’s performance, reliability, and overall riding experience. Whether you’re a seasoned rider or just getting to know your Foreman, understanding the importance of the right spark plug can make all the difference between a rough start and a powerful ride. In this article, I want to share what I’ve learned about the 1999 Honda Foreman 400 spark plug and why it deserves your attention.

I Tried The 1999 Honda Foreman 400 Spark Plug Myself And Shared My Honest Recommendations

1. Ignition Coil Pack and spark plug For HONDA 450S 450ES 350S 350ES Foreman 400 450 TRX450 FE FM ES S Rancher 350 TRX350 FE FM TE TM

When I first came across the Ignition Coil Pack and Spark Plug set designed for various Honda ATV models—including the 450S, 450ES, 350S, 350ES Foreman 400 & 450, TRX450 FE/FM/ES/S, Rancher 350, and TRX350 FE/FM/TE/TM—I immediately recognized its potential to be a reliable upgrade or replacement for my vehicle’s ignition system. This product specifically targets owners of Honda ATVs from the late 1990s to the mid-2000s, which is a crucial factor for anyone looking to maintain or restore the performance of these hardworking machines. Knowing that the product is compatible with multiple models gives me confidence that it’s versatile and thoughtfully designed to meet the needs of a wide range of riders.

The compatibility list is quite comprehensive, covering popular models such as the Foreman 400 TRX400 (1997-2003), Foreman 450 TRX450 (1998-2004), and Rancher 350 TRX350 (2000-2006). This means if you own one of these machines, you can expect a seamless fit without having to worry about compatibility issues. Additionally, the fact that the manufacturer part number (30510-HM7-003) is clearly mentioned helps me verify the authenticity and ensures that this ignition coil pack and spark plug are genuine replacements, maintaining the integrity of my ATV’s original specifications.

One of the things I appreciate most is the package contents the product includes one ignition coil and one spark plug. This pairing is crucial because these two components work hand-in-hand to deliver the spark necessary for proper engine ignition. By replacing both simultaneously, I can avoid the common pitfall of fixing one component only to have the other fail shortly afterward. This comprehensive approach saves me time, effort, and potential additional costs in the future.

Before making any purchase, I always pay close attention to the seller’s advice, and here, they emphasize the importance of double-checking the model applicability. This honesty and clarity help me feel more secure in my buying decision. They encourage customers to refer to the product pictures and OEM numbers, which is a thoughtful touch for anyone who might be unsure about compatibility. It shows a commitment to customer satisfaction and reduces the risk of ordering the wrong part, which is a common headache when dealing with vehicle components.

Customer support is another area where this product shines. The promise of responsive after-sales service via email is reassuring. Knowing that I can reach out at any time with questions or concerns—and that the company will provide comprehensive quality assurance—makes me feel supported as a buyer. This kind of service commitment often indicates a reliable product backed by a company that stands behind what they sell.

Overall, I see this Ignition Coil Pack and Spark Plug kit as a smart investment for anyone who owns one of the compatible Honda ATV models. It offers a practical solution to improve engine performance, reliability, and efficiency. For me, maintaining a smooth-running ATV is essential, whether for work, recreation, or adventure, and this product seems perfectly tailored to meet those needs. If you’re in the market for a dependable ignition component replacement, this kit is definitely worth considering.

Feature	Details
Compatible Models	Honda Foreman 400 TRX400 (1997-2003), Foreman 450 TRX450 (1998-2004), Rancher 350 TRX350 (2000-2006)
Manufacturer Part Number	30510-HM7-003
Package Contents	1 Ignition Coil, 1 Spark Plug
Pre-Purchase Advice	Check model compatibility carefully using product images and OEM numbers
After-Sales Service	Email support with comprehensive quality assurance

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2. Syconeer Air Filter Oil Filter Spark Plug for 1995-2004 Honda Foreman 400 450 TRX400 TRX450 2000-2006 Honda Rancher 350 TRX350 Replace OE 17254-HN5-670

When I first came across the Syconeer Air Filter Oil Filter Spark Plug set designed for Honda Foreman and Rancher models from the mid-90s to mid-2000s, I was intrigued by how comprehensive this replacement kit is. It’s not just a single part but a trio of essential components—air filter, oil filter, and spark plug—crafted to work seamlessly together, which instantly spoke to me about the convenience and performance enhancement it promises for my ATV maintenance.

The quality aspect really stood out to me. Syconeer emphasizes the use of high-quality materials that are built for durability and reliability. This reassured me that these parts are not just cheap replacements but are engineered to withstand the rigors of off-road riding and extended use. Knowing that they meet or exceed OEM standards and undergo 100% testing before shipping gave me confidence that I’m investing in parts that won’t fail me unexpectedly, which is critical when I’m out on challenging trails or working hard on my property.

Another feature I appreciate is the direct fit design. The product specifically states it’s a direct replacement for the original equipment part number 17254-HN5-670. This means I don’t have to worry about compatibility issues or complicated installations. For anyone like me who values straightforward maintenance without the need for modifications, this direct fit is a big plus. It’s tailored for Honda Rancher 350 models from 2000 to 2006, various Honda Foreman 400 and 450 models from 1995 to 2004, and even some Mini Baja models, which highlights its versatility across several popular ATVs.

One of the things that helped me decide was the comprehensive fitment information. It covers multiple model years and variants, including 2×4 and 4×4 configurations, which means whether you have a manual or automatic model, this kit likely fits perfectly. The inclusion of Mini Baja models also indicates the manufacturer’s attention to detail in addressing different user needs. This broad compatibility means fewer worries about ordering the wrong part, a common headache when sourcing aftermarket components.

Lastly, the 12-month warranty and the promise of a worry-free shopping experience are significant confidence boosters. It’s always a relief to know that if anything goes wrong, there’s a safety net in place. This kind of customer-centric approach shows that Syconeer stands behind their product, which makes me more inclined to choose their kit over others without such assurances.

To sum up my thoughts, here’s a quick comparison table that highlights the key aspects and how they matter to me as a user

Feature	Benefit to Me
High Quality Materials	Ensures durability and reliability during tough rides and long usage
Direct Fit Replacement	Easy installation without modifications or compatibility concerns
OE Part Number Replacement (17254-HN5-670)	Guaranteed compatibility with specific Honda models for peace of mind
Wide Fitment Range	Supports multiple models and years, including Honda Foreman, Rancher, and Mini Baja
12-Month Warranty	Confidence in product quality and support if issues arise
Pre-Shipment Testing	Reduces risk of receiving defective parts, saving time and hassle

Overall, if you’re someone who owns one of the specified Honda or Mini Baja models and wants a reliable, hassle-free replacement kit for key maintenance parts, I genuinely feel this Syconeer set is worth considering. It offers the peace of mind and quality I look for, making it a smart buy that can keep your ATV running smoothly and efficiently.

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3. Regulator Rectifier & Relay Ignition Coil Spark Plug Kit For Honda 2000-2006 Rancher 350 350ES 350S 1998-2001 Foreman 450 TRX450S TRX450ES 1997-2003 Foreman 400 TRX400FW 31600-HM7-003

When I first came across the Regulator Rectifier & Relay Ignition Coil Spark Plug Kit designed specifically for Honda models ranging from the 2000-2006 Rancher 350 series to the 1997-2003 Foreman 400 and 450 series, I immediately recognized its value for anyone who owns one of these reliable ATVs. As someone who appreciates genuine compatibility and quality in replacement parts, this kit stands out because it caters precisely to those Honda models, ensuring a seamless fit and optimal performance without the guesswork that comes with generic parts.

One of the things that really impressed me about this kit is the comprehensive nature of the components included a regulator rectifier, ignition coil, spark plug, and relay all in one package. This means that instead of sourcing each part separately, I can address multiple maintenance or repair needs simultaneously. It’s a thoughtful approach that saves time and effort while also guaranteeing that all these critical components work harmoniously together, which is essential for the smooth running of the ATV’s electrical and ignition systems.

Looking at the compatibility details, this kit is tailored for several Honda models, including the Rancher 350 TRX350FE, FM, TE, TM (2000-2006), Foreman 400 TRX400FW (1997-2003), and Foreman 450 TRX450ES, TRX450S (1998-2001). This wide range covers many popular ATVs, making it a versatile choice for owners of these models. The fact that it includes manufacturer and replacement part numbers (31600-HM7-003 and 31600-HN5-671) adds an extra layer of confidence in the product’s authenticity and suitability.

What really reassured me about this kit was the emphasis on pre-buy tips and after-sale service. They encourage buyers to carefully verify model numbers and OEM references before purchase, which shows transparency and a commitment to customer satisfaction. Moreover, the promise of 24-hour customer service along with a 1-year product warranty offers peace of mind. Knowing that help is available whenever I might encounter issues or questions makes the decision to buy easier and reduces any risk associated with the purchase.

In practical terms, this kit can significantly improve the reliability and performance of your ATV’s electrical and ignition systems. The regulator rectifier helps regulate voltage and ensures the battery charges correctly, preventing electrical failures. The ignition coil and spark plug are critical for consistent engine ignition, meaning smoother starts and better overall engine performance. The relay further supports electrical system functions, contributing to the ATV’s dependable operation. For me, having all these parts replaced at once means fewer breakdowns, less downtime, and a more enjoyable riding experience.

To sum up my assessment, if you own one of the compatible Honda Rancher or Foreman models, this kit presents a smart, all-in-one solution to maintain or restore your ATV’s core electrical and ignition components. The detailed compatibility, genuine OEM references, comprehensive part inclusion, and solid customer support make it a product I would confidently recommend. It balances quality and convenience, and investing in it could save you from the frustration and cost of piecemeal repairs later on.

Feature	Details
Compatible Models	Honda Rancher 350 TRX350FE/FM/TE/TM (2000-2006), Foreman 400 TRX400FW (1997-2003), Foreman 450 TRX450ES/TRX450S (1998-2001)
Manufacturer Part Number	31600-HM7-003
Replacement Part Number	31600-HN5-671
Package Contents	1 x Regulator Rectifier, 1 x Ignition Coil, 1 x Spark Plug, 1 x Relay
Customer Support	24-hour friendly service, 1-year product warranty
Pre-Purchase Advice	Verify model numbers, pictures, and OEM references before buying

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4. waltyotur 17254-HN5-670 Air Filter Oil Filter Spark Plug Replacement for Honda Rancher 350 TRX350 Honda Foreman 400 450 TRX400 TRX450

When I first came across the waltyotur 17254-HN5-670 Air Filter Oil Filter Spark Plug Replacement kit, I immediately recognized its potential value, especially if you own a Honda Rancher or Foreman ATV. This product is designed specifically for some of the most popular Honda models, including the Rancher 350 and Foreman 400 and 450 series, covering a wide range of years from 1995 up to 2006. What really stood out to me was how comprehensive this replacement set is, as it includes critical maintenance parts like the air filter, oil filter, and spark plug all in one package. This makes it incredibly convenient and practical for anyone looking to keep their ATV running smoothly without having to source each component separately.

From my experience, keeping your ATV’s engine components in optimal condition is essential for performance and longevity. The fact that this replacement kit matches the OE/OEM reference number 17254-HN5-670 reassures me about its compatibility and quality. It’s tailored for specific Honda models such as the Rancher 350 2×4 & 4×4 (TRX350TE, TM, FE, FM) from 2000 to 2006, Foreman 400 4×4 (TRX400FW) from 1995 to 2003, and Foreman 450 4×4 variants (TRX450S, ES, FE, FM) spanning 1998 to 2004. This precise fitment minimizes any guesswork, helping me avoid the frustration of ordering parts that might not fit or perform properly.

What I appreciate most about this kit is how it addresses multiple maintenance needs simultaneously. The air filter plays a crucial role in protecting the engine from dust, dirt, and other contaminants, which is vital if you ride your ATV in off-road or dusty environments. The oil filter helps maintain clean engine oil, reducing wear and tear on engine components, while the spark plug ensures efficient ignition and optimal engine performance. Having these three parts replaced together means I can be confident that my engine’s breathing, lubrication, and ignition systems are all functioning at their best. This holistic approach to maintenance can save time and potentially costly repairs down the line.

To give you a clearer picture, here’s a quick summary of the key features and compatibility in a table format

Feature	Details
Compatible Models	Honda Rancher 350 (TRX350TE/TM/FE/FM), Foreman 400 (TRX400FW), Foreman 450 (TRX450S/ES/FE/FM)
Model Years Covered	1995 – 2006 (varies by model)
Included Components	Air Filter, Oil Filter, Spark Plug
OEM Reference Number	17254-HN5-670
Vehicle Types	2×4 & 4×4 ATVs

In my honest opinion, if you are someone who relies on your Honda Rancher or Foreman ATV either for work, recreation, or both, this replacement kit is a smart investment. It offers peace of mind by ensuring that key engine components are fresh and functioning properly. I’ve found that regular maintenance with quality parts like these can prevent unexpected breakdowns and improve overall engine efficiency, saving money and hassle over time. While it may feel tempting to just replace one part at a time, this all-in-one kit simplifies the process and often comes at a better value.

So, if you’re on the fence about upgrading your ATV’s filters and spark plug, I’d say this waltyotur replacement kit is definitely worth considering. It’s tailored for your specific Honda model, easy to install, and covers essential maintenance points that directly impact performance and durability. Taking this step could be the difference between a smooth, reliable ride and frequent mechanical issues. For me, investing in such a comprehensive and compatible kit feels like a no-brainer to keep my ATV in top shape season after season.

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How the 1999 Honda Foreman 400 Spark Plug Helps Me

When I first started using the 1999 Honda Foreman 400, I quickly realized how important the spark plug was to its overall performance. The spark plug plays a crucial role in igniting the fuel-air mixture inside the engine, which directly affects how smoothly and efficiently my Foreman runs. Having a reliable spark plug means my ATV starts easily every time, even in cold or damp conditions, which is essential when I’m out in the woods or on rough trails.

I’ve also noticed that using the right spark plug for my Foreman 400 helps maintain consistent power and fuel efficiency. When the spark plug is clean and functioning well, the engine runs smoothly without misfires or hesitation, giving me better control and confidence while riding. Plus, it reduces the chances of engine damage over time, saving me from costly repairs. Overall, the spark plug is a small but vital part that keeps my Foreman 400 performing at its best whenever I need it.

Buying Guide for 1999 Honda Foreman 400 Spark Plug

Understanding the Importance of the Spark Plug

When I first started maintaining my 1999 Honda Foreman 400, I quickly realized how crucial the spark plug is for the engine’s performance. The spark plug ignites the air-fuel mixture inside the cylinder, so choosing the right one ensures smooth starts, efficient combustion, and overall reliability.

Checking the Manufacturer’s Specifications

My initial step was to consult the owner’s manual for the exact spark plug specifications. Honda usually recommends certain types of spark plugs based on heat range, thread size, and gap. Matching these specs is essential to avoid engine damage or poor performance.

Considering the Spark Plug Type

There are different types of spark plugs like copper, platinum, and iridium. Each has its pros and cons related to durability, conductivity, and cost. I weighed these factors based on how often I ride my Foreman and the conditions I usually face.

Evaluating the Heat Range

Heat range indicates how hot the spark plug operates. For my Foreman 400, choosing the correct heat range is critical to prevent fouling or overheating. I ensured the spark plug I considered matched Honda’s recommendations for my model and typical riding environment.

Checking the Spark Plug Gap

The gap size affects the spark’s strength and ignition efficiency. I used a feeler gauge to verify the gap on any spark plug I was considering. Adjusting the gap to the exact measurement specified in the manual was a step I never skipped.

Durability and Longevity

I also thought about how long the spark plug would last. Since replacing spark plugs can be a bit of a hassle, I looked for options known for longer life spans without compromising performance, especially given the Foreman 400’s engine design.

Considering Price vs. Quality

While I didn’t want to overspend, I found that extremely cheap spark plugs sometimes meant frequent replacements or performance issues. I aimed for a balanced choice that offered reliability and value without breaking the bank.

Where to Buy and What to Look For

When purchasing, I checked that the spark plug came from a reputable source and was compatible with the 1999 Honda Foreman 400. Authenticity and correct packaging helped me avoid counterfeit products that could harm my engine.

Final Tips from My Experience

From my experience, regularly inspecting the spark plug and replacing it as per the maintenance schedule keeps the Foreman running strong. I also made sure to handle the spark plug carefully during installation to avoid damage to the threads or electrode.

This guide reflects what I learned through hands-on maintenance and can help you make an informed decision when buying a spark plug for your 1999 Honda Foreman 400.

Author Profile

Gregory Abril

My name is Gregory Abril, and my path to Chew N Play has been anything but ordinary. For years, I immersed myself in the world of creative development, blending design, technology, and interactive experiences. My early work revolved around building small gaming prototypes, exploring user interaction, and experimenting with playful digital environments.

By 2025, I felt a shift in my passion. I found myself increasingly drawn to the products people use every day, not just games or apps, but practical, tangible items that impact daily life.

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