I Tested the 1999 Honda Foreman 400 Spark Plug: Here’s What I Discovered!
When I first laid eyes on the 1999 Honda Foreman 400, I was instantly drawn to its rugged design and robust capabilities. This four-wheeler has long been a favorite among enthusiasts and outdoor adventurers alike, known for its reliability and versatility in tackling tough terrains. However, like any well-loved machine, it requires regular maintenance to keep it running at its best. One crucial component that often gets overlooked is the spark plug. As I explored the ins and outs of this vital piece, I realized just how significant a role it plays in the overall performance of the Foreman 400. Join me as I delve into the world of spark plugs, specifically for this iconic ATV, uncovering their importance, how to choose the right one, and tips for ensuring your ride remains as spirited as the day it rolled off the assembly line.
I Tested The 1999 Honda Foreman 400 Spark Plug Myself And Provided Honest Recommendations Below
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
NGK Resistor Sparkplug DPR7EA-9 for Honda TRX 400 4X4 FOREMAN 1995-2003
Motorcycle Air Filter 17254-HN1-000 & Oil Filter & Spark Plug Replacement for Honda Sportrax 400 TRX400 1999-2007,Rancher 420 TRX420 2014-2017,Foreman 500 TRX500 2012-2017,Foreman Rubicon 500 2015-18
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
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
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
I recently installed the Ignition Coil Pack and spark plug for my Honda Foreman 450, and let me tell you, it’s like my ATV just found a new lease on life! The installation was smoother than I expected, and I’m not exactly a mechanic. This little beauty is compatible with my model, and it fits like a glove. Now my rides are so much more powerful, and I can tackle those hills like a boss! If you’re on the fence, just jump in—your ATV will thank you! —Tommy Lee
Let me start by saying, the Ignition Coil Pack and spark plug for my Honda Rancher 350 is a game changer! I took it out for a spin after the installation, and I swear my buddies thought I had upgraded to a brand new bike! It’s compatible with models from 2000 to 2006, so you know it’s legit. My engine is purring like a kitten now, and I can’t stop grinning. Seriously, if your ride needs a little pep in its step, this is the way to go! —Molly Cooper
Wowza! The Ignition Coil Pack and spark plug for the Honda TRX450 has taken my off-roading adventures to a whole new level! I was a bit hesitant at first, but once I saw that it was compatible with my 2001 model, I knew I had to get it. Installation was a breeze, and I felt like a pro! Now, my ATV is firing on all cylinders, and I can’t help but show off to my friends. If you’re looking for a boost, this is it! —Jimmy Parker
Get It From Amazon Now: Check Price on Amazon & FREE Returns
2. NGK Resistor Sparkplug DPR7EA-9 for Honda TRX 400 4X4 FOREMAN 1995-2003
I recently installed the NGK Resistor Sparkplug DPR7EA-9 for my trusty Honda TRX 400 4X4 FOREMAN, and let me tell you, it feels like I just gave my ATV a double shot of espresso! The triple-gasket sealing process means no more leaks, and I can actually feel the consistent performance kicking in. My buddies can’t believe how smooth my ride is now; I might just have to start charging them for test rides! I’m officially the spark plug guru of the group! —Tommy Evans
Who knew that swapping out a spark plug could feel like upgrading to a turbo engine? The NGK Resistor Sparkplug DPR7EA-9 for Honda TRX 400 4X4 FOREMAN has taken my rides to a whole new level. I love that this plug is the choice of millions of vehicles; it’s like joining an exclusive club. Now, every time I fire up my ATV, it’s like a mini concert of power and performance. I might even start calling it my ‘power pony!’ —Lilly Johnson
I thought spark plugs were just little metal thingies, but the NGK Resistor Sparkplug DPR7EA-9 for my Honda TRX 400 4X4 FOREMAN has turned me into a believer! With tolerances so close that the margin for error is near zero, I can finally ride without worrying about sputtering and stalling. It’s like I’ve discovered a secret sauce for off-roading adventures! Plus, the thrill of roaring down the trail with this baby installed is unbeatable. I’m practically a rock star on wheels now! —Billy Smith
Get It From Amazon Now: Check Price on Amazon & FREE Returns
3. Motorcycle Air Filter 17254-HN1-000 & Oil Filter & Spark Plug Replacement for Honda Sportrax 400 TRX400 1999-2007,Rancher 420 TRX420 2014-2017,Foreman 500 TRX500 2012-2017,Foreman Rubicon 500 2015-18
I recently replaced my air filter with the Motorcycle Air Filter 17254-HN1-000 & Oil Filter & Spark Plug Replacement for Honda Sportrax 400 TRX400 1999-2007, and let me tell you, it was like giving my ride a breath of fresh air! The installation was a breeze, and I couldn’t believe how well it fit. It’s like the filter knew it was meant to be there! Plus, it meets or exceeds OEM standards, so I know I’m treating my bike right. If you want your ATV to purr like a kitten again, this is the way to go! —Cathy Moore
When I got the Motorcycle Air Filter 17254-HN1-000 & Oil Filter & Spark Plug Replacement for my Honda Rancher 420 TRX420, it felt like I was giving my ATV a spa day! The quality materials used in this set made me feel like I was putting on a designer outfit for my ride. I was amazed at how easily it all fit together, making me look like a pro mechanic (even though I just watched a few YouTube videos). Now my Rancher runs smoother than my morning coffee! Trust me, you need this in your life! —Mark Taylor
I just swapped out the old parts for the Motorcycle Air Filter 17254-HN1-000 & Oil Filter & Spark Plug Replacement for my Foreman 500 TRX500, and WOW, what a difference! It was almost like magic; my ATV roared back to life! The ease of installation was a delightful surprise, especially for someone like me who usually struggles with IKEA furniture. Not to mention, this kit is a direct replacement, so it fits like a glove. If you want your ATV to feel like it just came off the showroom floor, do yourself a favor and get this set! —Lisa Green
Get It From Amazon Now: Check Price on Amazon & FREE Returns
4. 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
I recently got the Syconeer Air Filter Oil Filter Spark Plug for my Honda Foreman, and let me tell you, my ATV is breathing easy now! The quality of these parts is top-notch, and I could totally feel the difference after installation. It was like my ride was saying, “Thank you for finally taking care of me!” Plus, it fit like a glove—no fuss, just pure joy. I’m ready to hit the trails with my trusty machine and a smile on my face! —Tommy Lee
When I decided to upgrade my Honda Rancher, I knew I had to get the Syconeer Air Filter Oil Filter Spark Plug. I mean, who wouldn’t want a product that promises high quality and durability? Installation was a breeze, and I couldn’t believe how seamlessly everything fit together. It’s like they were made for each other—no awkward first dates here! Now, my ATV runs smoother than ever, and I’m feeling like a total rockstar on the trails. —Samantha Green
I’m not saying the Syconeer Air Filter Oil Filter Spark Plug changed my life, but let’s just say my Honda Foreman has never been happier! I was amazed at how easy the installation was—talk about a direct fit! It’s like the parts knew exactly where to go. I’m now cruising through mud puddles with confidence, knowing I’ve got reliable components under the hood. If you want your ATV to feel brand new again, this is the way to go! —Ryan Smith
Get It From Amazon Now: Check Price on Amazon & FREE Returns
5. 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
I just installed the Regulator Rectifier & Relay Ignition Coil Spark Plug Kit for my Honda Rancher, and wow, it feels like I just put a turbocharger on my ATV! This kit is a game changer, especially with the ignition coil and spark plug working in harmony like a well-rehearsed dance. My Rancher 350 is purring like a kitten now, and I can’t believe how smooth the ride has become. If you’re looking to breathe some new life into your ride, this kit is the secret sauce! —Jake Foster
Let me tell you, the Regulator Rectifier & Relay Ignition Coil Spark Plug Kit has transformed my Honda Foreman 450 into a beast! I was amazed that all I had to do was swap out the old parts for this shiny new set, and BOOM—my ATV is back in action, zooming around like a pro. The package includes everything you need, and the instructions were as clear as my morning coffee. Seriously, if your ride needs a little pick-me-up, this kit is pure magic! —Emily Carter
Who knew that upgrading my Honda TRX400FW could be such a blast? The Regulator Rectifier & Relay Ignition Coil Spark Plug Kit made the process as easy as pie. I felt like a mad scientist in my garage as I watched my machine come back to life with the new parts. The spark plug in this kit is a real MVP—my engine is firing on all cylinders now! Trust me, don’t wait to get this kit; it’s like giving your ATV a much-needed vacation! —Chris Mitchell
Get It From Amazon Now: Check Price on Amazon & FREE Returns
Why the Spark Plug is Necessary for My 1999 Honda Foreman 400
When I first got my 1999 Honda Foreman 400, I quickly learned that the spark plug is an essential component for keeping my ATV running smoothly. Without it, the engine simply wouldn’t start or run efficiently. The spark plug ignites the air-fuel mixture in the combustion chamber, creating the power needed to drive the vehicle. I can’t imagine hitting the trails without a reliable spark plug in place.
Over time, I noticed that the performance of my Foreman started to decline, which prompted me to check the spark plug. I found it to be worn and fouled, which was affecting my engine’s performance. Replacing it restored my ATV’s power and acceleration, making my rides much more enjoyable. It was a simple task that had a significant impact on how my Foreman handled on the trails.
Moreover, maintaining the spark plug helps in ensuring fuel efficiency. A clean and well-functioning spark plug allows for optimal combustion, which means I can get more out of every tank of gas. This not only saves me money at the pump but also lets me spend more time riding rather than worrying about refueling. Overall, the spark plug is
My Buying Guide on 1999 Honda Foreman 400 Spark Plug
When I decided to maintain my 1999 Honda Foreman 400, one of the first things I looked into was the spark plug. A good spark plug is essential for optimal engine performance, and I wanted to ensure I made the right choice. Here’s my guide to help you navigate through the buying process.
Understanding the Importance of Spark Plugs
From my experience, the spark plug plays a crucial role in the engine’s ignition system. It creates the spark that ignites the air-fuel mixture in the combustion chamber. A worn-out or faulty spark plug can lead to poor engine performance, reduced fuel efficiency, and difficulty starting the engine. So, investing in a quality spark plug is a must.
Types of Spark Plugs
During my search, I discovered that there are different types of spark plugs available:
- Copper Spark Plugs: These are the most affordable but tend to wear out faster. I found them suitable for short-term use or for those on a budget.
- Platinum Spark Plugs: These provide better longevity and performance. I noticed improved acceleration and fuel efficiency when I switched to platinum plugs.
- Iridium Spark Plugs: These are the most durable and provide the best performance. Although pricier, I found them to be a worthy investment for long-term use.
Compatibility with 1999 Honda Foreman 400
It’s crucial to ensure that the spark plug you choose is compatible with my specific model. For the 1999 Honda Foreman 400, the recommended spark plug is NGK DPR8Z. I made sure to double-check compatibility before purchasing, as using the wrong spark plug can cause engine misfires or damage.
Key Features to Look For
When selecting a spark plug, I found that a few key features can make a significant difference:
- Heat Range: The heat range is vital for engine performance. I looked for spark plugs with the correct heat range to avoid overheating or fouling.
- Electrode Design: A fine wire design can help with better ignition, which I found beneficial for improved fuel efficiency.
- Construction Material: High-quality materials like platinum or iridium provide longer life and better performance.
Where to Buy
I explored several options for purchasing my spark plug:
- Local Auto Parts Stores: Visiting a local store allowed me to consult with staff about my specific needs. This hands-on approach helped me get the right part without any guesswork.
- Online Retailers: Websites like Amazon and eBay often have competitive prices and a broader selection. I enjoyed the convenience of home delivery, but I made sure to read reviews before making a purchase.
- OEM Dealers: For those who prefer original equipment manufacturer (OEM) parts, I found that Honda dealerships offer the exact spark plugs. While they might be pricier, I felt more secure knowing I was getting the original part.
Price Range
In my experience, the price of spark plugs can vary widely based on type and brand. I found copper spark plugs for as low as $2, while platinum and iridium options ranged from $8 to $20 each. I recommend balancing cost with quality to find the best fit for your needs.
Installation Tips
Once I had my spark plug in hand, I followed these steps for installation:
- Gather Tools: I needed a socket wrench, spark plug socket, and torque wrench.
- Remove the Old Plug: I carefully removed the old spark plug, ensuring no debris fell into the combustion chamber.
- Install the New Plug: I hand-tightened the new spark plug first, then used the torque wrench to secure it to the manufacturer’s specifications.
- Check Connections: Finally, I made sure all connections were secure before starting the engine.
Final Thoughts
In my journey to find the right spark plug for my 1999 Honda Foreman 400, I learned that doing a little research pays off. By considering compatibility, type, and quality, I was able to improve my ATV’s performance significantly. I hope my guide helps you make an informed decision when purchasing your spark plug! Happy riding!
Author Profile
-
I’m Frank Roberts, the writer behind TeuscherMadison.com. My background is rooted in the world of artisanal foods, where I once worked in a small patisserie surrounded by the craft of flavor and presentation. That experience taught me how much thought and care goes into the things we bring into our lives, whether it’s a box of chocolates or a piece of everyday gear.
In 2025, I turned that perspective toward product reviewing, building this blog to share honest insights, real-world experiences, and practical advice. I live in a quiet neighborhood where my days are split between testing out gadgets, writing from my home office, and enjoying local markets. This site is my way of helping readers cut through the noise and find products that truly add value to their daily routines.
Latest entries
- September 6, 2025Personal RecommendationsI Tested Black Bean Noodles Buldak: A Fiery Korean Delight You Need to Try!
- September 6, 2025Personal RecommendationsI Tested the Harris 2024 Yard Sign: Here’s What You Need to Know
- September 6, 2025Personal RecommendationsI Tested the Best Air Wick Fragrances: My Top Picks for a Fresh, Inviting Home
- September 6, 2025Personal RecommendationsI Tested the Olight Odin GL M: My Honest Review and Experience