The Honda 400EX is a legendary all-terrain vehicle (ATV) prized for its reliability and fun factor. But even legends can benefit from a refresh. If you’re looking to breathe new life into your trusty 400EX without the hefty price tag of a new machine, modifications are a great option. This guide will walk you through some key areas to consider when upgrading your Honda 400EX, covering performance, suspension, and aesthetics.
Unleashing More Power: Performance Upgrades
The urge for more power is a common one among ATV enthusiasts. Here are a couple of ways to modify your 400EX for improved performance:
Exhaust System Upgrade: The stock exhaust system can restrict airflow and hinder performance. Replacing it with a high-performance exhaust system allows the engine to breathe better, potentially leading to increased horsepower and torque.
However, keep in mind that aftermarket exhausts can be louder and may not be street-legal, depending on your location.
Important Note: Modifying the exhaust system yourself, as described in the original article, is not recommended. It can be dangerous and could lead to improper air/fuel mixtures or damage to the engine. Upgrading to a pre-built performance exhaust system is a safer and more effective option.
Carburetion Tuning: An experienced mechanic can fine-tune your carburetor to optimize the air-fuel mixture for your specific engine and riding conditions. This can improve throttle response, power delivery, and overall performance. However, remember that carburetor modifications can be complex and should only be attempted by someone with the necessary expertise.
Dialing in the Ride: Suspension Upgrades
The suspension system plays a crucial role in handling, comfort, and safety. If your 400EX has seen its fair share of tough terrain, upgrading the suspension can make a significant difference. Here are some options to consider:
Shock Replacements: Swapping the stock shocks for those from a higher-performance ATV like the Honda 450EX can significantly improve handling and control. However, different shocks may have different spring rates and valves, so professional installation and adjustments might be necessary.
Re-valving and Re-springing: For a more customized approach, consider having your existing shocks professionally re-valved and re-sprung. This involves adjusting the internal components of the shocks to match your weight, riding style better, and intended use. It can be a cost-effective way to revitalize your suspension without needing entirely new shocks.
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Turning Heads: Aesthetic Upgrades
Once you’ve addressed performance and suspension, you can elevate the look of your 400EX. Here are some ideas to get you started:
Protective and Stylish Additions: Consider adding a set of nerf bars. These bars not only protect the rider’s legs in case of a tip-over but can also add a touch of style with various color options available.
Custom Paint Job and Graphics: A fresh coat of paint in your favorite color can dramatically transform the look of your ATV. Complement the paint job with some cool graphics or decals to truly personalize your ride. Remember to use high-quality paint specifically designed for ATVs to ensure durability.
Safety First – Bumpers and Grips: Upgrading to a sturdy bumper can protect the front end of your ATV from bumps and scrapes. New handlebar grips not only enhance comfort but can also add a pop of color or style.
Safety Disclaimer
As mentioned earlier, some modifications can be complex and affect the safety of your ATV. Always prioritize safety when upgrading your machine. If you need more time to perform the changes yourself, consult with a trusted mechanic experienced in working on ATVs. They can ensure the upgrades are done correctly and safely, allowing you to enjoy the improved performance and style of your Honda 400EX with confidence.
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