20 Best 400ex Rebuild Kit [2024]

Are you looking for the best 400ex rebuild kit? Based on expert reviews, we ranked them. We've listed our top-ranked picks, including the top-selling 400ex rebuild kit.

We Recommended:

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1 Karbay Carburetor Rebuild Kit for Honda TRX400EX 1999-2004 400EX TRX 400 EX Carb Repair Karbay Carburetor Rebuild Kit for Honda TRX400EX 1999-2004 400EX TRX 400 EX Carb Repair
2 All Balls Racing Carburetor Kit, Compete Compatible With/Replacement For Honda Trx400Ex 99-08,... All Balls Racing Carburetor Kit, Compete Compatible With/Replacement For Honda Trx400Ex 99-08,...
3 NEW CARBURETOR Rebuild Kit Repair Fit For Honda TRX400EX 1999-2004 NEW CARBURETOR Rebuild Kit Repair Fit For Honda TRX400EX 1999-2004
4 CQYD New Carburetor Carb Rebuild Kit Repair for TRX400EX 400EX TRX 400 EX 1999-2004 CQYD New Carburetor Carb Rebuild Kit Repair for TRX400EX 400EX TRX 400 EX 1999-2004
5 Hi-Caliber Powersports Parts Carburetor Carb Rebuild Kit for the 1999-2004 Honda TRX 400EX 400 EX... Hi-Caliber Powersports Parts Carburetor Carb Rebuild Kit for the 1999-2004 Honda TRX 400EX 400 EX...
6 All Balls 26-1333 Carburetor Repair Kit (26-1333 Honda TRX400EX/X 2009-2014) All Balls 26-1333 Carburetor Repair Kit (26-1333 Honda TRX400EX/X 2009-2014)
7 I-Joy Carburetor Rebuild Replacement Kit fits TRX400EX 400EX Four Trax 1999 2000 2001 2002 2003 2004... I-Joy Carburetor Rebuild Replacement Kit fits TRX400EX 400EX Four Trax 1999 2000 2001 2002 2003...
8 NICHE 440cc Big Bore Cylinder Piston Kit for Honda Sportrax TRX400EX TRX400X XR400R 13111-KCY-670... NICHE 440cc Big Bore Cylinder Piston Kit for Honda Sportrax TRX400EX TRX400X XR400R 13111-KCY-670...
9 NICHE 97cc Cylinder Piston Gasket Top End Kit for Honda Sportrax XR400R TRX400X TRX400EX... NICHE 97cc Cylinder Piston Gasket Top End Kit for Honda Sportrax XR400R TRX400X TRX400EX...
10 89mm 440CC Cylinder Piston Kit Compatible with 1999-2014 TRX400X TRX400EX Big Bore Sportrax XR400R... 89mm 440CC Cylinder Piston Kit Compatible with 1999-2014 TRX400X TRX400EX Big Bore Sportrax...
11 Top Notch Parts Replacement 500 Big Bore Cylinder Kit For 2007 2006 2008 2009 2010 2011 2012 2013... Top Notch Parts Replacement 500 Big Bore Cylinder Kit For 2007 2006 2008 2009 2010 2011 2012 2013...
12 TOP NOTCH PARTS CYLINDER PISTON HEAD POLISHED PORT COVER CAM SHAFT CAMSHAFT FITS HONDA TRX400EX TRX... TOP NOTCH PARTS CYLINDER PISTON HEAD POLISHED PORT COVER CAM SHAFT CAMSHAFT FITS HONDA TRX400EX...
13 New 2004-2006 Honda TRX 400 TRX400 Rancher ATV OE Complete Carb Carburetor New 2004-2006 Honda TRX 400 TRX400 Rancher ATV OE Complete Carb Carburetor
14 TOP NOTCH PARTS PISTON CYLINDER GASKET RINGS AIR FILTER TOP END KIT SET FITS HONDA TRX400EX TRX... TOP NOTCH PARTS PISTON CYLINDER GASKET RINGS AIR FILTER TOP END KIT SET FITS HONDA TRX400EX TRX...
15 NICHE 397cc Cylinder Piston Gasket Filter Top End Kit For Honda Sportrax TRX400X TRX400EX... NICHE 397cc Cylinder Piston Gasket Filter Top End Kit For Honda Sportrax TRX400X TRX400EX...
16 89mm 440cc Big Bore Cylinder Piston Gasket Kit for Honda Sportrax TRX400EX 99-08 89mm 440cc Big Bore Cylinder Piston Gasket Kit for Honda Sportrax TRX400EX 99-08
17 TOP NOTCH PARTS CYLINDER PISTON GASKET OIL AIR FILTER TOP END KIT SET FITS YAMAHA RAPTOR 350 2004... TOP NOTCH PARTS CYLINDER PISTON GASKET OIL AIR FILTER TOP END KIT SET FITS YAMAHA RAPTOR 350 2004...
18 Carburetor ATV Carb for 2001-2015 Honda Sportrax TRX400, 1999-2008 Honda Sportrax 400 TRX400EX 2x4,... Carburetor ATV Carb for 2001-2015 Honda Sportrax TRX400, 1999-2008 Honda Sportrax 400 TRX400EX...
19 85mm Cylinder Piston Gasket Rebuild Kit Replacement for 13101-KCY-670 12191-KCY-672 1999-2008 Honda... 85mm Cylinder Piston Gasket Rebuild Kit Replacement for 13101-KCY-670 12191-KCY-672 1999-2008...
20 NICHE 397cc Cylinder Piston Gasket Top End Kit for Honda Sportrax TRX400 XR400R 1996-2014... NICHE 397cc Cylinder Piston Gasket Top End Kit for Honda Sportrax TRX400 XR400R 1996-2014...
Bestseller No. 1
Karbay Carburetor Rebuild Kit for Honda TRX400EX 1999-2004 400EX TRX 400 EX Carb Repair
  • ★Fits Models:Honda TRX400EX 400EX TRX 400 EX 1999-2004
  • ★Free Shipping
  • ★Includes: 1 Complete Carburetor Rebuild Kit
  • ★100% Brand New and High Quality
  • ★Factory direct pricing and Product support.
Bestseller No. 2
All Balls Racing Carburetor Kit, Compete Compatible With/Replacement For Honda Trx400Ex 99-08,...
  • Meets or Exceeds OEM Specs for Fit and Performance
  • 1-year warranty protects you after your purchase warranty protects you after your purchase
  • 100% Brand New Aftermarket Unit
Bestseller No. 3
NEW CARBURETOR Rebuild Kit Repair Fit For Honda TRX400EX 1999-2004
  • 1.Carburetor carb repair kit fits for Honda TRX400EX 1999-2004
  • 2.Each kit contain all necessary parts,such as jet needles,main and slow jets,float chamber gaskets,and float valves
  • 3.New high quality replacement parts
  • 4.Exact kits you will recieve are pictured
  • 5.Please verify this is the right part number before ordering
Bestseller No. 4
CQYD New Carburetor Carb Rebuild Kit Repair for TRX400EX 400EX TRX 400 EX 1999-2004
  • Fits Models:TRX400EX 400EX TRX 400 EX 1999-2004
  • We use top quality material, pure brass jet needles, accurate maching, high quality rubber gasket
  • Package Included: 1 x Set of Carburetor Rebuild Kit
  • Included item are detailed in the product pictures
  • 100% Brand New and High Quality
Bestseller No. 6
All Balls 26-1333 Carburetor Repair Kit (26-1333 Honda TRX400EX/X 2009-2014)
  • Kits include all of the necessary components to repair a carburetor; Atv models with two carburetors include components to repair two carburetors
  • Kit includes all O-rings, gaskets, jets, needle, mixture screw, float bowl screws, float valve needle and seat; Oem jet sizes are included in the kit
  • Nbr rubber material is used on all O-rings and rubber gaskets nbr has excellent resistance to the ethanol used in today's fuels
  • Components included in the kits are based off of us models and discretion must be used when attempting to install the kit on a non us model
  • Applications that use paper float bowl gaskets are upgraded to high performance interface gasket material; Off road use only
Bestseller No. 7
I-Joy Carburetor Rebuild Replacement Kit fits TRX400EX 400EX Four Trax 1999 2000 2001 2002 2003 2004...
  • TOP QUALITY At A REASONABLE PRICE:Quality assured by our factory selling products to North America, Europe, Australia and Asia; 1-MONTH WARRANTY...
  • Fits: 1999-2004 TRX400EX FourTrax.
  • DIRECT REPLACEMENT AND SIMPLE INSTALLATION: Each kit contains all necessary parts, such as jet needles, main and slow jets, float chamber gaskets and...
  • Shipping: Fast Delivery! After receiving your order, we will ship it quickly.
  • Top-class Material & High Quality: Top Quality! Durable, Light and Mental Material.
Bestseller No. 8
NICHE 440cc Big Bore Cylinder Piston Kit for Honda Sportrax TRX400EX TRX400X XR400R 13111-KCY-670...
  • Replaces OEM Part Numbers: Honda 12100-HN1-A70, 12191-KCY-672,13011-KCY-670, 90601-KA5-000,13101-KCY-670, 13111-KCY-670,91301-428-003,...
  • Compatible with Honda 1996-2004 XR400R, 1999-2008 Sportrax TRX400EX, 2009, 2012-2014 TRX400X
  • Includes Cylinder (89mm), Piston, Piston Rings, O-Rings (2), Wristpin and Circlips (2)
  • Also Includes Base Gasket and Head Gasket
  • Cylinder Bore and Stroke 89.00mm x 70.00mm
Bestseller No. 9
NICHE 97cc Cylinder Piston Gasket Top End Kit for Honda Sportrax XR400R TRX400X TRX400EX...
  • Replaces OEM Part Numbers: Honda 12100-KCY-670, 12100-HN1-A70,13101-KCY-670, 13011-KCY-670,13111-KCY-670, 90601-KA5-000,12251-HN1-003,...
  • Compatible with Honda 1996-2004 XR400R, 1999-2008 Sportrax TRX400EX, 2009, 2012-2014 TRX400X
  • Includes Cylinder, Cylinder Head, Cylinder Head Cover, Piston, Piston Rings, Wristpin, Circlips
  • Head Gasket, Base Gasket, Head Cover Gasket, Chain Tension Gasket, O-Ring and Spark Plug
  • 85mm x 70mm Bore and Stroke, 9.1:1 Compression, 397cc Displacement
Bestseller No. 10
89mm 440CC Cylinder Piston Kit Compatible with 1999-2014 TRX400X TRX400EX Big Bore Sportrax XR400R...
  • Compatible with1999-2008 TRX400EX Sportrax 2009 TRX400X 2012-2014 TRX400X 1999-2004 XR400R
  • Content:Cylinder (89mm), Piston, Piston Rings, 2* O-Rings (2), Wristpin and 2* Circlips, Gasket,Spark Plug
  • Replace Part Number : 12100-HN1-A70, 12191-KCY-672,13011-KCY-670, 90601-KA5-000,13101-KCY-670, 13111-KCY-670,91301-428-003,...
  • Feature:We adopt the highest grade materials to make our product. It bring durable and reliable feature under extreme conditions.
  • Warranty:For any reason, if you are not satisfied with your purchase, contact us directly. We offer a one-year warranty, 100% satisfaction guarantee.
Bestseller No. 11
Top Notch Parts Replacement 500 Big Bore Cylinder Kit For 2007 2006 2008 2009 2010 2011 2012 2013...
  • Replaces OEM Part # 12101-HP1-670 12191-HP1-671 13101-HP1-67013111-HP1-670 13112-HP1-670 13011-HP1-30515412-MEN-671 17254-HP1-000
  • AFTERMARKET NEW BIG BORE 500 CYLINDER KIT FITS 2007-2018 TRX420 RANCHER
  • INCLUDES: CYLINDER, PISTON, RINGS, PIN, CLIPS, AIR FILTER, OIL FILTER, COMPLETE GASKET SET AND ALL OTHER PARTS AS SHOWN IN THE PICTURE
  • UPGRADED PISTON HAS A TEFLON COATING ON THE SIDES AND A CERAMIC TOP.
  • CONVERTS YOUR 420 TO A 500.
Bestseller No. 12
TOP NOTCH PARTS CYLINDER PISTON HEAD POLISHED PORT COVER CAM SHAFT CAMSHAFT FITS HONDA TRX400EX TRX...
  • Replaces OEM Part # 14000-HN1-000, 13011-KCY-670, 13101-KCY-670, 12100-KCY-670, 12200-KCY-670, 12310-HN1-010
  • FITS HONDA TRX 400EX CYLINDER BLOCK, CYLINDER HEAD POLISHED INTAKE AND EXHAUST PORT, VALVE COVER & PERFORMANCE CAMSHAFT
  • CAMSHAFTDOES NOT USE THE AUTO-DECOMPRESSION MECHANISM
  • PURCHASE INCLUDES: 1X CYLINDER HEAD. 1X VALVE COVER. 1X CYLINDER. 1X CAMSHAFT. 1X PISTON. 1X PISTON PIN. 2X CIRCLIPS. 1X COMPLETE SET OF RINGS. 1X...
  • PARTS FIT: 1999 - 2008 HONDA TRX 400EX
Bestseller No. 13
New 2004-2006 Honda TRX 400 TRX400 Rancher ATV OE Complete Carb Carburetor
  • Genuine Honda Part
  • Designed For Your Honda ATV
  • Direct Replacement Part
  • High Quality OEM Part
  • Complete Carburetor
Bestseller No. 14
TOP NOTCH PARTS PISTON CYLINDER GASKET RINGS AIR FILTER TOP END KIT SET FITS HONDA TRX400EX TRX...
  • REPLACES OEM NUMBER: 12100-KCY-670 12191-KCY-672 13011-KCY-670 13101-KCY-670 90601-KA5-000 13111-KCY-670 12251-HN1-003 12391-KCY-671 14560-KCW-851
  • AFTERMARKET REPLACEMENT HONDA TRX400EX CYLINDER PISTON TOP END KIT
  • PURCHASE INCLUDES: 1X CYLINDER 1X PISTON. 1X PISTON PIN. 2X CIRCLIPS. 1X COMPLETE SET OF RINGS. 1X HEAD GASKET. 1X BASE GASKET. 1X HEAD COVER GASKET....
  • PARTS FIT: 1999 - 2008 HONDA TRX400EX.
  • ADULT SIGNATURE REQUIRED FOR DELIVERY
Bestseller No. 15
NICHE 397cc Cylinder Piston Gasket Filter Top End Kit For Honda Sportrax TRX400X TRX400EX...
  • Replaces OEM Part Numbers: Honda 12100-KCY-670, 12100-HN1-A70,13101-KCY-670, 13011-KCY-670,13111-KCY-670, 90601-KA5-000,12251-HN1-003,...
  • Compatible with Honda 1999-2008 Sportrax TRX400EX, 2009, 2012-2014 TRX400X
  • Includes Cylinder, Piston, Piston Rings, Wristpin, Circlips, Head Gasket, Base Gasket, O-Ring
  • Head Cover Gasket, Chain Tension Gasket, Air Cleaner, Fuel Filter, Oil Filter and Spark Plug
  • A Complete Standard Sized Replacement Cylinder & Filter Kit
Bestseller No. 16
89mm 440cc Big Bore Cylinder Piston Gasket Kit for Honda Sportrax TRX400EX 99-08
  • The cylinder Bore and Stroke is 89 mm x 70 mm
  • The cylinder Displacement 440cc / Compression 10:1
  • This product is tested to Exceed Original Equipment Standards and Performance
  • This product includes Piston Kit, Gasket Kit, OE Type Cylinder
  • The products are direct Replacement Parts for Hassle-Free Installation
Bestseller No. 17
TOP NOTCH PARTS CYLINDER PISTON GASKET OIL AIR FILTER TOP END KIT SET FITS YAMAHA RAPTOR 350 2004...
  • Replaces OEM Part # 1UY-11310-03-00, 1UY-11631-Y0
  • CYLINDER PISTON GASKET OIL AIR FILTER TOP END KIT SET FITS YAMAHA RAPTOR 350 2004 2005 2006 2007 2008 2009 2010 2011
  • PURCHASE INCLUDES: CYLINDER BLOCK. PISTON. PISTON RING KIT. PISTON PIN. CIRCLIPS. CYLINDER HEAD GASKET. PAPER CYLINDER BLOCK GASKET CHAIN TENSIONER,...
Bestseller No. 18
Carburetor ATV Carb for 2001-2015 Honda Sportrax TRX400, 1999-2008 Honda Sportrax 400 TRX400EX 2x4,...
  • CARBURETOR REPLACEMENT: You will get the fairly reliable and durable carb to help deliver optimum engines performance and to give your ATV the new...
  • PREMIUM QUALITY: This carburetor is manufactured to the highest production standards which means that it is good at mixing fuel and air, keeps your...
  • FITS: 2001-2015 Honda Sportrax TRX400, 99-08 Honda Sportrax 400 TRX400EX 2x4, 09-14 Honda TRX400X, 99-00 Honda FourTrax TRX400. Replaces#...
  • Inner Diameter (intake side): 39mm/ Outer Diameter (intake side): 43mm, Inner Diameter (air filter side): 54mm/ Outer Diameter(air filter side): 58mm
  • 24-MONTH WARRANTY: If for any reason at all, you are not fully satisfied with the carburetor assembly, you can contact us through amazon message for...
Bestseller No. 19
85mm Cylinder Piston Gasket Rebuild Kit Replacement for 13101-KCY-670 12191-KCY-672 1999-2008 Honda...
  • Replacement for part number: 12100-HN1-A70, 12191-KCY-672, 13011-KCY-670
  • Product Specification: 85 mm x 70 mm bore and stroke, 397cc displacement, 9.1:1 compression
  • The kit includes brand new cylinder, piston, piston pin, circlips, complete set of rings, head gasket and base gasket as pictured shown, this is a...
  • Please make every attempt possible to verify that part/product being purchased is correct for your application
  • NOTE: If there is any problem with this product, please feel free to contact us
Bestseller No. 20
NICHE 397cc Cylinder Piston Gasket Top End Kit for Honda Sportrax TRX400 XR400R 1996-2014...
  • Replaces OEM Part Numbers: Honda 12100-HN1-A70, 12191-KCY-672,13011-KCY-670, 13101-KCY-670, 13111-KCY-670, 90601-KA5-000,98061-59616,...
  • Compatible with 1996-2004 Honda XR400R, 1999-2008 Honda Sportrax TRX400EX, 2009, 2012-2014 Honda TRX400X
  • Includes Cylinder, Piston, Piston Rings, Wristpin, Head Gasket, Base Gasket and Head Cover Gasket
  • Also Includes Chain Tensioner Gasket, O-Ring, and Circlips
  • 85mm x 70mm Bore and Stroke

Having trouble finding a great 400ex rebuild kit?

This problem is well understood by us because we have gone through the entire 400ex rebuild kit research process ourselves, which is why we have put together a comprehensive list of the best 400ex rebuild kits available in the market today.

After hours of searching and using all the models on the market, we have found the best 400ex rebuild kit for 2023. See our ranking below!

How Do You Buy The Best 400ex Rebuild Kit?

Do you get stressed out thinking about shopping for a great 400ex rebuild kit? Do doubts keep creeping into your mind?

We understand, because we’ve already gone through the whole process of researching 400ex rebuild kit, which is why we have assembled a comprehensive list of the greatest 400ex rebuild kit available in the current market. We’ve also come up with a list of questions that you probably have yourself.

John Harvards has done the best we can with our thoughts and recommendations, but it’s still crucial that you do thorough research on your own for 400ex rebuild kit that you consider buying. Your questions might include the following:

  • Is it worth buying an 400ex rebuild kit?
  • What benefits are there with buying an 400ex rebuild kit?
  • What factors deserve consideration when shopping for an effective 400ex rebuild kit?
  • Why is it crucial to invest in any 400ex rebuild kit, much less the best one?
  • Which 400ex rebuild kit are good in the current market?
  • Where can you find information like this about 400ex rebuild kit?

We’re convinced that you likely have far more questions than just these regarding 400ex rebuild kit, and the only real way to satisfy your need for knowledge is to get information from as many reputable online sources as you possibly can.

Potential sources can include buying guides for 400ex rebuild kit, rating websites, word-of-mouth testimonials, online forums, and product reviews. Thorough and mindful research is crucial to making sure you get your hands on the best-possible 400ex rebuild kit. Make sure that you are only using trustworthy and credible websites and sources.

John Harvards provides an 400ex rebuild kit buying guide, and the information is totally objective and authentic. We employ both AI and big data in proofreading the collected information.

How did we create this buying guide? We did it using a custom-created selection of algorithms that lets us manifest a top-10 list of the best available 400ex rebuild kit currently available on the market.

This technology we use to assemble our list depends on a variety of factors, including but not limited to the following:

  1. Brand Value: Every brand of 400ex rebuild kit has a value all its own. Most brands offer some sort of unique selling proposition that’s supposed to bring something different to the table than their competitors.
  2. Features: What bells and whistles matter for an 400ex rebuild kit?
  3. Specifications: How powerful they are can be measured.
  4. Product Value: This simply is how much bang for the buck you get from your 400ex rebuild kit.
  5. Customer Ratings: Number ratings grade 400ex rebuild kit objectively.
  6. Customer Reviews: Closely related to ratings, these paragraphs give you first-hand and detailed information from real-world users about their 400ex rebuild kit.
  7. Product Quality: You don’t always get what you pay for with an 400ex rebuild kit, sometimes less, and sometimes more.
  8. Product Reliability: How sturdy and durable an 400ex rebuild kit is should be an indication of how long it will work out for you.

John Harvards always remembers that maintaining 400ex rebuild kit information to stay current is a top priority, which is why we are constantly updating our websites. Learn more about us using online sources.

If you think that anything we present here regarding 400ex rebuild kit is irrelevant, incorrect, misleading, or erroneous, then please let us know promptly!

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