Top 10 Best Big Bore Kit For 400ex 2022

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If you are looking for the best Big Bore Kit For 400ex as your need, then you are at the right place. After checking several products and analysis them for a long time, we pick the best Big Bore Kit For 400ex currently available in the market. Hopefully, our expert suggestions in this article will help you find your ideal choice. We found 41782 reviews when researching. We have considered users’ feedback on the best Big Bore Kit For 400ex and our suggestions include only the finest of them in this article.
We are suggesting the best Big Bore Kit For 400ex based on users needs that can actually fulfill their demands. In this article we've included our suggestions for the Big Bore Kit For 400ex reviews that help you to take the buying decision easily as your needs. Our team research and scanned 41782 reviews before putting any suggestions for the best Big Bore Kit For 400ex in this article. So you don’t need to worry about our suggestion.

Best Big Bore Kit For 400ex
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Comparison Chart for Best Big Bore Kit For 400ex

Let’s have a look at the top available products available in the market and find out the best one from the given list below.

Comparison Chart of Top 10 Big Bore Kit For 400ex

NoProductScoreAction
1TOP NOTCH PARTS 440cc BIG BORE CYLINDER PISTON RINGS TOP END KIT FITS HONDA TRX400EX TRX 400EX 99 00 01 02 03 04 05 06 07 089.2Buy On Amazon
285mm 397cc STD Bore Cylinder Piston Gasket Kit for Honda Sportrax TRX400EX 99-089.2Buy On Amazon
3Hot Cams 1043-2 Camshaft9.2Buy On Amazon
420 Pieces Carburetor Main Jet Kit9.2Buy On Amazon
589mm 440cc Big Bore Cylinder Piston Gasket Kit for Honda Sportrax TRX400EX 99-089Buy On Amazon
6NICHE 85mm 397cc Cylinder Piston Gasket Top End Kit For Honda Sportrax TRX400EX TRX400X XR400R 1996-20149Buy On Amazon
7KIPA Complete Top End Head Gasket Kit For TRX400EX TRX 400EX Sportrax 400 1999-2008 TRX400X TRX 400X 2009-2014 Cylinder Piston Head Engine Repair Non-Asbestors8.8Buy On Amazon
8Carburetor ATV Carb for 2001-2015 Honda Sportrax TRX4008.8Buy On Amazon
9NICHE 87mm 416cc Big Bore Cylinder for Honda 1996-2014 Sportrax TRX400 XR400R 12100-KCY-670 12100-HN1-A708.6Buy On Amazon
10NICHE 89mm 440cc Big Bore Cylinder Piston Kit For Honda TRX400X XR400R 1996-2014 12100-HN1-A78.4Buy On Amazon

Table Of Content:

1. TOP NOTCH PARTS 440cc BIG BORE CYLINDER PISTON RINGS TOP END KIT FITS HONDA TRX400EX TRX 400EX 99 00 01 02 03 04 05 06 07 08

  • 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.
  • HONDA TRX 400EX 440cc BIG BORE CYLINDER PISTON TOP END KIT
  • PISTON TOP HAS A CERAMIC COATING PROVIDING SUPERIOR HEAT RESISTANCE WHICH WILL EXTEND THE LIFE SPAN OF THE PISTON.
  • PURCHASE INCLUDES: 1X CYLINDER 1X PISTON.
  • PARTS FIT: 1999 – 2008 HONDA TRX 400EX.

2. 85mm 397cc STD Bore Cylinder Piston Gasket Kit for Honda Sportrax TRX400EX 99-08

  • The cylinder Bore and Stroke is 85 mm x 70 mm
  • The cylinder Displacement 397cc
  • 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

3. Hot Cams 1043-2 Camshaft

  • Specs: Camshafts
  • Meets or Exceeds OEM Specs for Fit and Performance
  • Compatible With/Replacement For: Honda ATV TRX 400EX 1999-2006
  • 100% New aftermarket Camshafts built to meet OEM specifications

4. 20 Pieces Carburetor Main Jet Kit

  • Package includes: comes with 10 pieces of carburetor main jets and 10 pieces of slow pilot jets, sufficient quantity for you to replace.
  • Quality material: our carburetor main jet kit is made of brass without any burrs or other noticeable defects, the threads features even color, smooth and clean, which is very easy to install.
  • Size of slow pilot jets: 32, 35, 38, 40, 42, 45, 48, 50, 52, 55; Thread pitch: 6 x 0.
  • Size of main jets: 100, 105, 108, 110, 115, 120, 125, 130, 135, 140; Thread pitch: 4.
  • Wide compatibility: the main jet and slow pilot jet can be applied for PWK, CVK, PE type carburetor, OKO, KOSO, Stage-6, Polini and so on; Notice: the compatibility is just for reference, please compare with your original one with care before purchasing.

5. 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

6. NICHE 85mm 397cc Cylinder Piston Gasket Top End Kit For Honda Sportrax TRX400EX TRX400X XR400R 1996-2014

  • 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, 12251-HN1-A41,12191-KCY-672,12191-KCY-671,12191-HN1-A71.
  • 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

7. KIPA Complete Top End Head Gasket Kit For TRX400EX TRX 400EX Sportrax 400 1999-2008 TRX400X TRX 400X 2009-2014 Cylinder Piston Head Engine Repair Non-Asbestors

  • Complete Top End Head Gasket Kit For TRX400EX TRX 400EX Sportrax 400 1999-2008
  • Complete Top End Head Gasket Kit For TRX400X TRX 400X 2009-2014
  • Non-Asbestors Gasket with seal
  • This is a Top Quality Brand new aftermarket Replacement Part
  • Easy to install, manual is not included, However, You may search lots of video online. Thanks

8. Carburetor ATV Carb for 2001-2015 Honda Sportrax TRX400

  • CARBURETOR REPLACEMENT: You will get the fairly reliable and durable carb to help deliver optimum engines performance and to give your ATV the new power and torque.
  • PREMIUM QUALITY: This carburetor is manufactured to the highest production standards which means that it is good at mixing fuel and air, keeps your engine running smoothly and prevents engine from lacking of oil or spilling.
  • FITS: 2001-2015 Honda Sportrax TRX400, 99-08 Honda Sportrax 400 TRX400EX 2×4, 09-14 Honda TRX400X, 99-00 Honda FourTrax TRX400.
  • 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 carefree REPLACEMENT or REFUND.

9. NICHE 87mm 416cc Big Bore Cylinder for Honda 1996-2014 Sportrax TRX400 XR400R 12100-KCY-670 12100-HN1-A70

  • High Quality Replacement Cylinder 87mm Big Bore
  • Replaces OEM Part Numbers: Honda 12100-KCY-670, 12100-HN1-A70
  • Compatible with Honda 1996-2004 XR400R
  • Compatible with Honda 1999-2008 Sportrax TRX400EX
  • Compatible with Honda 2009, 2012-2014 TRX400X

10. NICHE 89mm 440cc Big Bore Cylinder Piston Kit For Honda TRX400X XR400R 1996-2014 12100-HN1-A7

  • 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, 12251-HN1-003,12100-KCY-670, 12100-KCY-670, 12191-KCY-672.
  • 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

How To Choose The Best Big Bore Kit For 400ex

Does the thought of finding a great Big Bore Kit For 400ex stress you out? Has your mind been juggling between choices when it comes to buying Big Bore Kit For 400ex in general, specifically regarding which model to choose?
If that’s the case, know that you’re not alone. Many people find it tough to buy the perfect Big Bore Kit For 400ex for themselves. We understand the stress associated with the buying process!

Since you’re here, you are obviously curious about Big Bore Kit For 400ex. You’ve been bombarded with information, so you need to find a reputable source with credible options before you make any decisions on which product would be best for your needs.

There are many sources that’ll provide you with that information- buying guides or ratings websites, word-of-mouth testimonials from friends or family members, online forums where users share their personal experiences, product reviews specifically found all over the internet and YouTube channels. Only thorough research will ensure that you get the right product.

But that’s not always easy, right? That's why we've taken time to compile a list of the best Big Bore Kit For 400ex in today's market, on your behalf, so that there will be no more worries for you.

How did we come up with the list, you ask? How did we create this buying guide?

  • First, our algorithms collected as much information available about these products from trusted sources.
  • We employed both Artificial Intelligence and large data volume to validate all collected information.
  • Then our AI ranked them on their quality-to-price ratio using industry-standard criteria that let us pick the best Big Bore Kit For 400ex currently on the market!
The products aren’t chosen randomly. We consider several criteria before assembling a list. Some of the criteria are discussed below-

  1. Brand Value: What happens when you go for a not-so-reputable brand just because the price seems cheap? Well, the chance of getting a short-lasting product goes higher. That’s because the renowned brands have a reputation to maintain, others don’t.


Top Big Bore Kit For 400ex brands try to offer some unique features that make them stand out in the crowd. Thus hopefully, you’ll find one ideal product or another in our list.

  1. Features: You don’t need heaps of features, but useful ones. We look at the features that matter and choose the top Big Bore Kit For 400ex based on that.
  2. Specifications: Numbers always help you measure the quality of a product in a quantitative way. We try to find products of higher specifications, but with the right balance.
  3. Customer Ratings: The hundreds of customers using the Big Bore Kit For 400ex before you won’t say wrong, would they? Better ratings mean better service experienced by a good number of people.
  4. Customer Reviews: Like ratings, customer reviews give you actual and trustworthy information, coming from real-world consumers about the Big Bore Kit For 400ex they used.
  5. Seller Rank: Now, this is interesting! You don’t just need a good Big Bore Kit For 400ex, you need a product that is trendy and growing in sales. It serves two objectives. Firstly, the growing number of users indicates the product is good. Secondly, the manufacturers will hopefully provide better quality and after-sales service because of that growing number.
  6. Value For The Money: They say you get what you pay for. Cheap isn’t always good. But that doesn’t mean splashing tons of money on a flashy but underserving product is good either. We try to measure how much value for the money you can get from your Big Bore Kit For 400ex before putting them on the list.
  7. Durability: Durability and reliability go hand to hand. A robust and durable Big Bore Kit For 400ex will serve you for months and years to come.
  8. Availability: Products come and go, new products take the place of the old ones. Probably some new features were added, some necessary modifications were done. What’s the point of using a supposedly good Big Bore Kit For 400ex if that’s no longer continued by the manufacturer? We try to feature products that are up-to-date and sold by at least one reliable seller, if not several.
  9. Negative Ratings: Yes, we take that into consideration too! When we pick the top rated Big Bore Kit For 400ex on the market, the products that got mostly negative ratings get filtered and discarded.
These are the criteria we have chosen our Big Bore Kit For 400ex on. Does our process stop there? Heck, no! The most important thing that you should know about us is, we're always updating our website to provide timely and relevant information.

Since reader satisfaction is our utmost priority, we have a final layer of filtration. And that is you, the reader! If you find any Big Bore Kit For 400ex featured here Incorrect, irrelevant, not up to the mark, or simply outdated, please let us know. Your feedback is always welcome and we’ll try to promptly correct our list as per your reasonable suggestion.

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