400EX Carburetor Compatible with Honda TRX400EX TRX400X - Reliable Fit

In this review the 400EX Carburetor is examined as a direct replacement for Honda Sportrax TRX400EX and TRX400X models from 1999 through 2015. The bottom line: this carburetor kit is for owners who need a straightforward mechanical replacement that fits the listed model years and restores basic engine responsiveness. Our review found the unit delivers a proper physical fit and comes with an air filter, making installation more convenient, though a minority of buyers reported functionality problems that warrant cautious expectations.

Key Features

• Fitment: Fits a wide range of Honda Sportrax TRX400EX and TRX400X year models, which reduces the guesswork when sourcing a replacement carburetor.
• Included parts: The package includes one carburetor and one air filter, providing the primary components needed for a swap without separate ordering.
• Replacement numbers: Replaces part numbers 16100-HN1-A43 and 16100-HN1-013, simplifying cross-referencing with factory service literature.
• Manufacturing standard: Built to stated production standards intended to deliver reliable and durable performance for everyday riding.
• Support: Seller promises a 24 hour response for failures or defects, which helps with post-purchase issues.

Who It's For

This carburetor is best for DIY owners and mechanics working on 1999-2015 Honda TRX400EX and TRX400X ATVs who need a direct-fit replacement and want a tidy bundle that includes an air filter. It appeals to riders restoring older Sportrax machines or replacing a worn factory carburetor without hunting for multiple parts.

Those who need a guaranteed plug-and-play performance match for competition tuning or who expect factory-level calibration out of the box should look elsewhere or plan on careful setup. A few buyers reported functionality problems, so this unit is less suited to someone who cannot accept the possibility of additional tuning or warranty communication.

Pros & Cons

Pros

• Good physical fit across the listed TRX400EX and TRX400X year ranges.
• Includes an air filter so the basic installation is more complete than parts-only options.
• Replaces known Honda part numbers, making part matching straightforward.

Cons

• Some customers reported the carburetor did not function correctly for them, indicating the possibility of adjustment or quality control issues.

Specifications

Product type	Carburetor kit
Compatible models	Honda Sportrax TRX400EX and TRX400X (1999-2015)
Included items	1 x Carburetor, 1 x Air Filter
Replaces	16100-HN1-A43; 16100-HN1-013
Brand	Gator parts
Application	400EX TRX400 engine replacement

Our Verdict

The 400EX Carburetor is a practical value choice for owners needing a direct replacement for Honda TRX400EX/TRX400X models because it fits the listed years, includes an air filter, and cross-references factory part numbers. It represents reasonable value for routine repairs, but buyers should be prepared to perform final adjustments or contact seller support if functionality issues appear.

Frequently Asked Questions

Will this carburetor fit my 2004 TRX400EX?
Yes, the unit lists fitment for TRX400EX models from 1999 through 2008 and TRX400X through 2015, so a 2004 TRX400EX is included.

What is included in the package?
The package includes one carburetor and one air filter so you have the main components needed for installation.

What if the carburetor fails after installation?
The seller states they will respond within 24 hours to failures, cracks, or non-working parts; contact them to arrange support or a remedy.