The Best 440ex Big Bore Kit On Amazon

We know what it’s like to be confused by all of the 440ex big bore kit products on the market. There are many options, and knowing which will work best for your needs can be hard. We started by looking at some of the most popular 440ex big bore kit products today and comparing their features and functionality. Then we take a look at some of the best sellers on Amazon and see what people are saying about them.

And We’ve researched and found some of the best models on the market today. Now that you’re here, too, you can learn more about them and decide which one is right for you.

We’ll tell you a little about each product we recommend so that you have all the information necessary to make an informed buying decision. Let’s get started!

Top 10 best 440ex big bore kit: Compared

Top 10 Best 440ex big bore kit: Reviews & Listing

When it comes to 440ex big bore kit, there are many options. The good news is you don’t have to spend hours trying them all out to find the best one for you. We’ve done the hard work for you!

During the testing process, we compared the features and functionality of several popular 440ex big bore kit products on the market today. Following this, we reviewed some of the best sellers on Amazon and heard what people had to say about them.

We also looked at expert and customer reviews on Amazon and other websites like YouTube to get a better idea of how these products stack up against each other in terms of:

  • Quality
  • Durability
  • Features
  • Price
  • Performance
  • Brand
  • Reviews
  • Ease of Use
  • Versatility
  • Durability
  • Reliability
  • Availability
  • Service and more.
Bestseller No. 1
NICHE 440cc Big Bore Cylinder Piston Kit for Honda Sportrax TRX400EX TRX400X XR400R 13111-KCY-670 91301-428-003
  • 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
Bestseller No. 2
6 Sigma Carb Jet Kit fits Honda TRX440EX TRX 440EX 440 cc EX Bore Custom Performance Stage 1-3 Carburetor Jetting
  • Increased Performance at all RPM's, Faster Throttle Response, & Stops Lean Exhaust Popping that Damages Engines.
  • Each Jet Kit is Custom Made to your Specifications for Optimum Performance, When You Order, Please Contact us , with Your Exact Year, Model, Modifications Made, & Elevation, So we can Design, Build, & Ship Your Kit.
  • The kit comes with complete instructions for installation. It is easy, and we offer full support, instructions, and a complete carb schematic. Only basic hand tools are required.
  • Kit Includes: 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, Proper Tuning Techniques, and step by step instructions with photos.
  • We give a 100% Satisfaction Guarantee. Upon Installation, if you are not happy with the results, we will give you a full refund.
Bestseller No. 3
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
  • Replaces OEM Part # 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-KCY-670 15410-KF0-315
  • TOP NOTCH PARTS REPLACEMENT 440cc BIG BORE CYLINDER, COMPLETE HEAD AND PERFORMANCE CAMSHAFT HONDA TRX 400EX
  • COMPLETE HEAD AND PERFORMANCE CAMSHAFT HONDA TRX 400EX
  • THIS CAMSHAFT OFFERS 15% INCREASE IN POWER WORKS WELL WITH STANDARD AND BIG BORE KITS UP TO 440cc
  • 1X PISTON. 1X PISTON PIN. 2X CIRCLIPS. 1X COMPLETE SET OF RINGS. 1X HEAD GASKET. 1X BASE GASKET. 1X HEAD COVER GASKET. 1X CHAIN TENSIONER GASKET. 1X COMPLETE CYLINDER HEAD (POLISHED INTAKE AND EXHAUST PORT) 1X PERFORMANCE CAMSHAFT 1X GASKET MAKER. 1X THREAD LOCK. 1X FUEL FILTER. 1X AIR FILTER 1X OIL FILTER. 1X FREE NGK SPARK PLUG
Bestseller No. 4
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. * THIS IS THE BEST QUALITY KIT ON EBAY! EQUAL TO OR BETTER THAN OEM
  • 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. 1X CHAIN TENSIONER GASKET. 1X GASKET MAKER. 1X THREAD LOCK. 1X FUEL FILTER. 1X OIL FILTER. 1X FREE NGK SPARK PLUG
  • PARTS FIT: 1999 - 2008 HONDA TRX 400EX.
Bestseller No. 5
Athena (P400485100029) 58mm 144cc Big Bore Cylinder Kit
  • Package Dimensions: 15.494 H x 33.528 L x 20.573 W (centimetres)
  • Package Weight: 5.599 pounds
  • Built from race proven designs to Yamaha factory specifications
  • Country of Origin : Italy
Bestseller No. 6
BBR Motorsports 120cc Big Bore Kit with Cam 411-HXR-1001
  • Kit Includes: BBR aluminum cylinder, piston, rings, piston pin, clips, performance camshaft, heavy-duty valve springs, rockers with tappet adjusters and gasket kit
Bestseller No. 7
Top Notch Parts Replacement Fits Honda Xr400r XR 400R 440cc Big Bore Cylinder Kit Complete Head Polished Ports Performance Camshaft 96 97 98 99 00 01 02 03 04
  • Replaces OEM Part # 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-KCY-670 15410-KF0-315
  • AFTERMARKET HONDA XR400R 440cc BIG BORE CYLINDER
  • COMPLETE HEAD AND PERFORMANCE CAMSHAFT FREE NGK SPARK PLUG
  • PISTON TOP HAS A CERAMIC COATING PROVIDING SUPERIOR HEAT RESISTANCE WHICH WILL EXTEND THE LIFE SPAN OF THE PISTON
  • 1X CYLINDER (BIG BORE) 1X PISTON. 1X PISTON PIN. 2X CIRCLIPS. 1X COMPLETE SET OF RINGS. 1X HEAD GASKET. 1X BASE GASKET. 1X HEAD COVER GASKET. 1X CHAIN TENSIONER GASKET. 1X COMPLETE CYLINDER HEAD (POLISHED INTAKE AND EXHAUST PORT) 1X PERFORMANCE CAMSHAFT 1X GASKET MAKER. 1X THREAD LOCK. 1X FUEL FILTER. 1X AIR FILTER 1X OIL FILTER. 1X FREE NGK SPARK PLUG. 1996 - 2004 HONDA XR 400R.
Bestseller No. 8
WFLNHB New Big Bore Cylinder Piston Rings Top End Kit for 1999-2008 Honda Trx400ex 400cc
  • Big Bore Cylinder Piston Rings Top End Kit for 1999-2008 Honda Trx400ex 400cc
  • Replaces Part :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
  • Package Including:1x Cylinder 1x Piston. 1x Piston Pin. 2x Circlips. 1x Complete Set of Rings.
  • 1x Head Gasket. 1x Base Gasket. 1x Head Cover Gasket. 1x Chain Tensioner Gasket.
  • 1x Gasket Maker. 1x Thread Lock. 1x Fuel Filter. 1x Oil Filter. 1x Free Ngk Spark Plug.
Bestseller No. 9
89mm 440CC Cylinder Piston Kit Compatible with 1999-2014 TRX400X TRX400EX Big Bore Sportrax XR400R Replace 12100-HN1-A70
  • Compatible with: Honda 1999-2008 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, 12251-HN1-003,12100-KCY-670, 12100-KCY-670, 12191-KCY-672
  • 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. 10
TOP NOTCH PARTS BIG BORE CYLINDER PISTON RINGS TOP END KIT FITS HONDA XR400R XR 400R 440cc 96 98 99 00 01 02 03 04
  • 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
  • FITS HONDA XR400R 440cc BIG BORE CYLINDER PISTON TOP END KIT. FREE NGK SPARK PLUG * 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. 1X PISTON PIN. 2X CIRCLIPS. 1X COMPLETE SET OF RINGS. 1X HEAD GASKET. 1X BASE GASKET. 1X HEAD COVER GASKET. 1X CHAIN TENSIONER GASKET. 1X GASKET MAKER. 1X THREAD LOCK. 1X FUEL FILTER. 1X OIL FILTER. 1X FREE NGK SPARK PLUG
  • PARTS FIT: 1996 - 2004 HONDA XR 400R.
  • ADULT SIGNITURE REQUIRED FOR DELIVERY

How to Chose the Best 440ex big bore kit

Buying 440ex big bore kit online can be a great experience. However, you need to know how to buy the right products and what to consider before you make your purchase.

Here are some important tips on how to buy 440ex big bore kit online:

  • Know what you want before you browse
  • Find out if the 440ex big bore kit is available for sale
  • Check for the quality of the product before buying it
  • Check if the 440ex big bore kit is authentic and original
  • Avoid buying from unverified sellers
  • If there is no return policy, be careful while buying products online
  • Read reviews from other customers who have used the product
  • Check for any discounts or deals offered by the seller

When you are buying an 440ex big bore kit online, there are some points that you must consider. These points will help you get the best 440ex big bore kit for the money and ensure that the product is delivered on time. Here are a few things to keep in mind when buying a 440ex big bore kit online:

Look for Price

First and foremost is the price. A product’s price should be one of the first things you consider before making a purchase. It is important to remember that many factors can affect the price of a certain item, such as shipping costs, taxes and other fees. If you are not careful enough, you may spend more on your purchase than you expected.

Consider the Budget

When buying 440ex big bore kit online, it is also important to ensure that they will fit well with your lifestyle or budget if they are not necessities but still wanted in your home or office space. If you are on a tight budget, it is important to consider the product’s price and how much it will cost to ship it. Consider using sites like Amazon or eBay if you want something more affordable and in demand.

Check Reviews

Before buying 440ex big bore kit, it is important to check its reviews. There are many websites where you can find out what customers have to say about a particular product. If there are many positive reviews, then it means that the product works well and is worth buying. However, if there are negative reviews, it would be better not to buy that particular product as there may be some problems with it, and it might not meet your expectations when you receive it at home.

Check for Product Availability

If you want to buy a particular item but cannot find it anywhere except on one website, this should raise a red flag as something fishy could be happening here. It might be possible that they are selling counterfeit 440ex big bore kit or stolen goods that they have purchased from someone else and now trying to sell them online at a higher price than what they originally paid for these products. In such cases, it

Payment Methods

If you’re buying from a company with physical locations, you will typically have more payment options than buying from a third-party site. Ensure the website accepts your preferred payment method online purchasing 440ex big bore kit. If you don’t see it listed on the website, ask them if they accept it before placing your order.

Returns Policy

Pay attention to the return policy before making a purchase. Some sites offer free returns, while others only provide exchanges and no refunds. Check what type of returns policy the site has before purchasing so there aren’t any surprises later on. Returning a product may be a headache, but it’s worth doing if you run into issues with the 440ex big bore kit. If the retailer doesn’t offer free returns, try contacting them before purchasing to see their return policy.

Shipping Costs

When ordering 440ex big bore kit online, shipping costs should also be considered. Shipping costs can vary depending on where you live and how much weight your order has, so compare prices between different sellers before making a decision. You might save money by paying for faster shipping or extra overnight delivery but keep in mind that once an item is shipped, there’s nothing else you can do until it arrives at your doorstep (or mailbox).

 

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