Unlock Incredible Power with the Best Honda 400ex 440 Big Bore Kit!

Are you looking to enhance the performance of your Honda 400EX? A 440 Big Bore Kit is a great option, allowing you to take your machine to the next level. With a 440 Big Bore Kit, you can enjoy an increase in power, torque and acceleration. This introduction will give you an overview of what a 440 Big Bore Kit has to offer and provide insight into how it can benefit your 400EX. We’ll discuss the various components and features of these kits and explain why this upgrade is worth considering for any Honda 400EX owner looking for increased power and performance.

Why Best Honda 400ex 440 Big Bore Kit Is Necessary?

The Best Honda 400ex 440 big bore kit is necessary for those who are looking to increase the performance of their ATV. By increasing the engine displacement from 400cc to 440cc, the Honda 400ex will experience an increase in power output and improved torque, allowing for more aggressive riding. Additionally, the bigger bore kit includes higher compression pistons and a cam profile specifically designed to maximize performance. With these upgrades, riders can expect improved acceleration and top speed as well as increased durability and reliability.

Comparison Chart for Best honda 400ex 440 big bore kit

Recommended Product Briefs on Best honda 400ex 440 big bore kit Are Listed Below

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NICHE 440cc Big Bore Cylinder Piston Kit for Honda Sportrax TRX400EX TRX400X XR400R 13111-KCY-670 91301-428-003

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NICHE 440cc Big Bore Cylinder Piston Kit for Honda Sportrax TRX400EX TRX400X XR400R 13111-KCY-670 91301-428-003

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labwork New 89MM Big Bore Top End Gasket Fit for Honda TRX400EX TRX 400EX 440

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labwork New 89MM Big Bore Top End Gasket Fit for Honda TRX400EX TRX 400EX 440

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Top Notch Parts Replacement Big Bore Cylinder Complete Head Polished Ports Performance Camshaft For 99 00 01 02 03 04 05 06 07 08 Honda Trx400ex TRX 400ex 440cc

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Top Notch Parts Replacement Big Bore Cylinder Complete Head Polished Ports Performance Camshaft For 99 00 01 02 03 04 05 06 07 08 Honda Trx400ex TRX 400ex 440cc

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Wiseco W5942 Big Bore Replacement Gasket Kit - Fits: Honda TRX 400EX 1999-2008

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Wiseco W5942 Big Bore Replacement Gasket Kit – Fits: Honda TRX 400EX 1999-2008

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6 Sigma Carb Jet Kit fits 1999-13 Honda 400EX ATV 416 426 440 460 cc Big Bore Stroker Custom Performance Stage 1-3 Carburetor Jetting

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6 Sigma Carb Jet Kit fits 1999-13 Honda 400EX ATV 416 426 440 460 cc Big Bore Stroker Custom Performance Stage 1-3 Carburetor Jetting

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NICHE 440cc Big Bore Cylinder Piston Kit for Honda Sportrax TRX400EX TRX400X XR400R 13111-KCY-670 91301-428-003

 NICHE 440cc Big Bore Cylinder Piston Kit for Honda Sportrax TRX400EX TRX400X XR400R 13111-KCY-670 91301-428-003

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The NICHE Big Bore Cylinder Piston Kit for Honda Sportrax TRX400EX TRX400X XR400R is an essential upgrade for anyone looking to maximize their engines performance. The cylinder kit includes everything you need to increase the power of your Hondas engine, from the cylinder and piston to gaskets and O-rings. It is compatible with a variety of popular Honda models, ranging from 1996 XR400Rs to 2014 TRX400Xs. This kit is a great way to get the most out of your engine and keep your bike running at its best.

Why We Like This
Replaces OEM Parts: The NICHE Big Bore Cylinder Piston Kit comes with all the parts needed to replace OEM parts, ensuring a precise fit and optimal performance.
Compatible With Popular Models: The kit is compatible with a range of popular Honda models, including the XR400R, Sportrax TRX400EX, and TRX400X.
Includes Everything You Need: The kit comes with everything you need to upgrade your engines performance, including cylinders, pistons, rings, O-rings, wristpins, and more.
Increases Power Output: With this kit installed in your bikes engine, you can expect an increase in power output due to increased displacement size.
Durable Construction: The high-quality construction ensures that this kit will stand up to wear and tear over time and keep your engine running smoothly for years to come.

Common Questions & Answers
Q: Does this kit include all necessary gaskets?
A: Yes! The NICHE Big Bore Cylinder Piston Kit includes both base gasket and head gasket for easy installation.
Q: Is this product compatible with my Honda model?
A: Yes! This product is compatible with 1996-2004 XR400Rs 1999-2008 Sportrax TRX400EX 2009s 2012-2014 TRX400Xs.
Q: What is the cylinder bore size?
A: The cylinder bore size for this specific kit is 89mm x 70mm.

Additional Product Information

Height 6.5
Length 11.5
Weight 7.7
Width 8.5

labwork New 89MM Big Bore Top End Gasket Fit for Honda TRX400EX TRX 400EX 440

 labwork New 89MM Big Bore Top End Gasket Fit for Honda TRX400EX TRX 400EX 440

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Are you looking for a top end gasket kit that fits your Honda TRX400EX TRX 400EX 440? Look no further than the Labwork New 89MM Big Bore Top End Gasket Kit. This kit is designed to rebuild your old ATV and get it screaming again. It is easy to install and comes with exact items you will receive pictured. With this quality kit, you can be sure that you have rebuild it right the first time.

Why We Like This
Replacement for Honda TRX400EX TRX 400EX 440
Rebuild it right the first time with this quality kit and get your old atv screaming again
Easy to install, manual is not included
Exact items you will receive are pictured
If you have any problems with the products you received, please contact us in time

Common Questions & Answers
Q: Does this product come with a manual?
A: No, this product does not come with a manual.
Q: Can I use this product on other vehicles?
A: This product is specifically designed for Honda TRX400EX TRX 400EX 440 vehicles only.
Q: What if I have problems with the products I received?
A: If you have any problems with the products you received, please contact us in time.

Additional Product Information

Top Notch Parts Replacement Big Bore Cylinder Complete Head Polished Ports Performance Camshaft For 99 00 01 02 03 04 05 06 07 08 Honda Trx400ex TRX 400ex 440cc

 Top Notch Parts Replacement Big Bore Cylinder Complete Head Polished Ports Performance Camshaft For 99 00 01 02 03 04 05 06 07 08 Honda Trx400ex TRX 400ex 440cc

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Are you looking for an upgrade to your Honda TRX400ex? Look no further than the Top Notch Parts Replacement Big Bore Cylinder Complete Head Polished Ports Performance Camshaft! This complete set includes a 440cc big bore cylinder, complete head and performance camshaft, giving you 15% increase in power and works with standard and big bore kits up to 440cc. The cylinder is also polished with intake and exhaust ports. Additionally, you get a piston, piston pin, circlips, a complete set of rings, gasket maker and thread lock, fuel filter, air filter and oil filter. Plus a free NGK spark plug!

Why We Like This
Replaces OEM parts 12100-KCY-670 12191-KCY-672 12200-KCY-670 12251-MBV-013 12310-KCY-672 12391-KCY-671 13011-KCY-670 13101-KCY-670 13111-KCY-670 90601-KA5-000 14000-KCY0 670 15410 KF0 315
Performance camshaft offers 15% increase in power
Works well with standard and big bore kits up to 440cc
Includes all necessary components for installation
Comes with a free NGK spark plug

Common Questions & Answers
Q: Is adult signature required for delivery?
A: Yes, adult signature is required for delivery.
Q: Will this fit my 99 Honda TRX400ex?
A: Yes, this part is compatible with 99 00 01 02 03 04 05 06 07 08 Honda TRX400ex models.
Q: Does it include the fuel filter?
A: Yes, this kit comes with a fuel filter as well as an air filter and oil filter.

Additional Product Information

Wiseco W5942 Big Bore Replacement Gasket Kit – Fits: Honda TRX 400EX 1999-2008

 Wiseco W5942 Big Bore Replacement Gasket Kit - Fits: Honda TRX 400EX 1999-2008

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The Wiseco W5942 Big Bore Replacement Gasket Kit is the perfect solution for Honda TRX 400EX owners looking to upgrade their engine performance. The kit contains all the necessary gaskets and O-rings to rebuild your top end, and is also compatible with XR400 440 Overbore 1996-04, XR400 (87-88mm bore) 1996-05, TRX400EX (87-88mm bore) 1999-08, and TRX400X (87-88mm bore) 2009-12. Thanks to its high quality materials and engineering by Wiseco, you can rest assured that this gasket kit will provide superior durability that meets and exceeds OEM specifications.

Why We Like This
Compatible with multiple Honda models
High quality materials for superior durability
Engineered by Wiseco to ensure compatibility
Contains all necessary gaskets and O-rings for rebuilds
Meets and exceeds OEM specifications

Common Questions & Answers
Q: Is this gasket kit compatible with other Honda models?
A: Yes! This gasket kit is also compatible with XR400 440 Overbore 1996-04, XR400 (87-88mm bore) 1996-05, TRX400EX (87-88mm bore) 1999-08, and TRX400X (87-88mm bore) 2009-12.
Q: What does the kit contain?
A: The Wiseco W5942 Big Bore Replacement Gasket Kit contains all the necessary gaskets and O-rings to rebuild your top end.
Q: Does this meet OEM specifications?
A: Yes! The high quality materials used in this gasket kit ensure a critical seal that meets and exceeds OEM specifications.

Additional Product Information

Length 7
Weight 0.18
Width 6

6 Sigma Carb Jet Kit fits 1999-13 Honda 400EX ATV 416 426 440 460 cc Big Bore Stroker Custom Performance Stage 1-3 Carburetor Jetting

 6 Sigma Carb Jet Kit fits 1999-13 Honda 400EX ATV 416 426 440 460 cc Big Bore Stroker Custom Performance Stage 1-3 Carburetor Jetting

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The 6 Sigma Carb Jet Kit is a great choice for any Honda 400EX ATV. This kit fits the 1999-13 models and offers 416, 426, 440, or 460 cc big bore stroker performance. The kit comes with complete instructions for installation and can be easily installed with basic hand tools. It also comes with main jets, needle adjusters, nylon spacers, drill bits, slide hole mod (with CV carb), idle mixture mod, slide spring mod (with CV carb), carb schematic, specifications, carb sync tool build, carb cleaning procedure and proper tuning techniques all designed to increase your ATV’s performance at all RPMs and provide faster throttle response while stopping lean exhaust popping that can damage engine parts.

Why We Like This
Increased Performance at all RPM’s
Faster Throttle Response
Stops Lean Exhaust Popping that Damages Engines
Comes with Complete Instructions for Installation
100% Satisfaction Guarantee

Common Questions & Answers
Q: Is installation easy?
A: Yes! Installation is easy and the kit comes with complete instructions. All you need are basic hand tools to get started. We also offer full support and a complete carb schematic to help you along the way.
Q: Does this help protect my engine?
A: Yes! The 6 Sigma Carb Jet Kit stops lean exhaust popping that can damage engine parts.
Q: Does this come with a guarantee?
A: Yes! We give a 100% Satisfaction Guarantee upon installation if you are not happy with the results we will give you a full refund.

Additional Product Information

Benefits of Best honda 400ex 440 Big Bore Kit

1. Increased Horsepower: The Best Honda 400ex 440 Big Bore Kit is designed to increase horsepower and torque. This can give you more power when accelerating and allow you to reach higher speeds with ease.

2. Improved Throttle Response: With the increased displacement of the Best Honda 400ex 440 Big Bore Kit, throttle response is improved significantly, giving you greater control over your ride.

3. Improved Fuel Economy: The increased displacement of the engine gives it a higher compression ratio which in turn improves fuel economy by allowing the engine to get more out of each drop of fuel.

4. Easier Maintenance: The Best Honda 400ex 440 Big Bore Kit helps to reduce wear and tear on internal engine components resulting in less maintenance required over time.

5. Enhanced Performance: With an increase in power, the Best Honda 400ex 440 Big Bore Kit will help you get more out of your ride with improved acceleration, top speed, and overall performance that can be felt instantly.

Buying Guide for Best honda 400ex 440 big bore kit

What is a Honda 400ex 440 Big Bore Kit?
A Honda 400ex 440 Big Bore Kit is an aftermarket kit that increases the displacement of the engine in your Honda 400ex ATV. It does this by increasing the diameter of the cylinder bore and replacing the cylinder with a larger one. The result is an engine that produces more power, allowing you to ride faster and conquer tougher terrain.

Benefits of Installing a Honda 400ex 440 Big Bore Kit
Installing a Honda 400ex 440 Big Bore Kit can offer several benefits. Most notably, it increases your engine’s power output, allowing you to tackle more difficult terrain with ease. Additionally, it can help reduce fuel consumption, as your engine will become more efficient due to its increased displacement. Finally, it can add value to your ATV by increasing its performance capabilities.

Things to Consider When Purchasing a Honda 400ex 440 Big Bore Kit
When purchasing a Honda 400ex 440 Big Bore Kit, there are several things to consider. First and foremost, make sure that you choose one from a reputable manufacturer with good customer reviews. Additionally, pay attention to the quality of materials used in the construction of the kit and make sure that all components are compatible with your ATV’s make and model. Finally, make sure that you have all necessary tools and supplies on hand before beginning installation.

Installation Process for a Honda 400ex 440 Big Bore Kit
Installation of a Honda 400ex 440 Big Bore Kit is not for the faint of heart as it requires extensive mechanical know-how and experience working on engines. First and foremost, you will need to completely drain all fluids from your ATV before beginning work on the engine. Next, remove all components necessary for access to the cylinder bore such as carburetor brackets or air filter housings. After gaining access to the cylinder bore, use appropriate tools such as an impact wrench or ratchet set to remove existing cylinder head bolts before replacing them with new ones included in the kit. Finally, reinstall any components removed during installation and refill fluids according to manufacturer specifications before testing out your newly upgraded engine!

The Honda 400ex 440 big bore kit is a great way to upgrade your ATV with improved performance. With the right parts and installation, you can expect to see an increase in power and torque as well as a better overall driving experience. The kit is also an affordable option for those looking to get the most out of their ATV without breaking the bank. With this kit, you can expect to have an engine that performs above and beyond what you could normally achieve with a stock 400ex.

Author Profile

Carl Frisch
Carl Frisch
With more than 30 years in the bicycle industry, I have a strong background in bicycle retailing, sales, marketing and customer service. I have a passion for cycling and a dedication to excellence. As a manager, I worked diligently to increase my capabilities and responsibilities, managing up to eleven mechanics (at Palo Alto Bicycles) and later as a working partner in my own store.

As the shop owner of Spoke n’ Word Cycles in Socorro, NM, the success of the mission was my responsibility, which I pursued passionately since we opened in 2003 through the spring of 2011. I am adept at managing owned and loan inventory, preparing weekly & annual inventory statements, and managing staff. The role as managing partner also allowed me tremendous freedom. I used this personal freedom to become more deeply involved in my own advancement as a mechanic, to spearhead local trail building, and advocating for cycling both locally and regionally.

As a mechanic, I have several years doing neutral support, experience as a team mechanic, and experience supporting local rides, races, club events. I consistently strive to ensure that bicycles function flawlessly by foreseeing issues and working with the riders, soigners, coaches and other mechanics. Even with decades of experience as a shop mechanic and team mechanic, and continue to pursue greater involvement in this sport as a US Pro Mechanic, and UCI Pro Mechanic.

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