With numerous Best 400ex Top End Kit brands to select from – including big names like Wiseco,TOP NOTCH PARTS,NICHE,MOFANS – picking the right product can feel overwhelming. But we’re here to simplify your search for the perfect Best 400ex Top End Kit.
We thoroughly tested and evaluated a wide range of top Best 400ex Top End Kit contenders to help you navigate the crowded market. Our stand-out favorite is Wiseco Best 400ex Top End Kit for its unparalleled quality and top-tier features. Below you’ll discover more of our top-rated Best 400ex Top End Kit picks currently available.
Make sure to consult our buying guide too for valuable insights on choosing the ideal product for your needs. It covers all the key factors when shopping for a Best 400ex Top End Kit. With our research backing your decision, you can confidently invest in a Best 400ex Top End Kit you’ll truly love.
Editor's Choice
Wiseco Bottom End Rebuild Kit for Honda TRX 400EX 1999-2004
Premium Pick
TOP NOTCH PARTS PISTON CYLINDER GASKET RINGS AIR FILTER TOP END KIT SET FITS HONDA TRX400EX TRX
Budget Pick
TOP NOTCH PARTS 440cc BIG BORE CYLINDER PISTON RINGS TOP END KIT FITS HONDA TRX400EX TRX 400EX 99 00
Top 10 Best 400ex Top End Kit
We researched and compared the top products in the Best 400ex Top End Kit category to provide you with these recommendations.
1. Wiseco Bottom End Rebuild Kit for Honda TRX 400EX 1999-2004
- See fitment guide image for additional Machines this item fits. Bottom End Rebuild Kit includes crankshaft assembly, complete bottom end gasket kit, and bearings.
- Everything you need in one box.
- Complete gasket set with all engine seals and O-rings.
- OEM grade main bearing for ultimate smooth operation.
- Double forged for ultimate strength and durability.
2. 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. 1X CHAIN TENSIONER GASKET. 1X FREE NGK SPARK PLUG. 1X OIL FILTER 1X FUEL FILTER 1X AIR FILTER 1x GASKET MAKER 1X THREAD LOCK
- PARTS FIT: 1999 - 2008 HONDA TRX400EX.
- ADULT SIGNATURE REQUIRED FOR DELIVERY
3. TOP NOTCH PARTS 440cc BIG BORE CYLINDER PISTON RINGS TOP END KIT FITS HONDA TRX400EX TRX 400EX 99 00
- 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.
4. NICHE Cylinder Piston Gasket Camshaft Top End Kit for Honda TRX400 XR400R 12100-KCY-670
- Replaces OEM Part Numbers: Honda 12100-HN1-A70, 12191-KCY-672,12391-KCY-671, 14000-HN1-A70, 13011-KCY-670, 13101-KCY-670,13111-KCY-670, 90601-KA5-000,98061-59616,12100-KCY-670,14000-HN1-000
- Compatible with the 1996-2004 Honda XR400R, 1999-2008 Honda Sportrax TRX400EX, 2009, 2012-2014 Honda TRX400X
- Includes Cylinder, Camshaft, Piston, Piston Ring Set, Wristpin and Circlips
- Also Includes Head and Base Gaskets, O-Ring and NGK Spark Plug
- Cylinder Bore and Stroke 85mm x 70mm
5. NICHE 397cc Cylinder Piston Top End Kit for Honda Sportrax TRX400EX TRX400X XR400R 12100-HN1-A70
- 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, 12251-HN1-003,12391-KCY-671, 12100-KCY-670
- 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; Cylinder Material: Aluminum; Cylinder Sleeve Coating: None
6. MOFANS 12191-KCY-672 85mm Piston Complete Set Cylinder Piston Kit with Gaskets Fit for Honda
- Fitment: Top End Kit Fit for Compatible with Honda Trx400ex TRX 400EX 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008.
- Replacement 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 Included: 1 set complete cylinder piston rebulid kit.
- Condition: Brand New.
7. maXpeedingrods 85mm 397cc Cylinder Piston Gasket Top End Kit for Honda Sportrax 400EX TRX400X
- [Wide Applications] - This aftermarket cylinder piston gasket kit fit for Honda Sportrax 400 TRX400EX 1999-2008
- [ Excellent Design] - Complete standard sized replacement cylinder kit. 85 mm x 70 mm Bore and Stroke; 397cc Displacement; 9.1:1 Compression
- [Package Contents] - 1 x Cylinder,1 x Piston,1 x Piston Pin,1 x Spark Plug,2 x Circlips,1 x Head Gasket,1 x Base Gasket,1 x Head Cover Gasket,2 x Piston Rings
- [Part 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-851,12100-HN1-A70,12191-KCY-672
- [Premium Quality] - The kit is made of high-strength metal material,can effectively improve heat,pressure,high temperature and corrosion resistance.Direct fit,no modification needed,easy to use and install.Please contact us if you have any questions
8. 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, 12251-HN1-A41,12191-KCY-672,12191-KCY-671,12191-HN1-A71
- Compatible with Honda 1999-2008 Sportrax TRX400EX, 2009, 2012-2014 TRX400X
- Cylinder Bore Size 85mm
- Head Cover Gasket, Chain Tension Gasket, Air Cleaner, Fuel Filter, Oil Filter and Spark Plug
- Cylinder Material: Aluminum; Cylinder Sleeve Coating: None
9. BH-Motor New Complete Gasket Kit Top & Bottom End Set for Honda 400EX TRX400EX TRX 400EX 1999-2004
- BH-Motor Complete Gasket Kits For Honda TRX400EX 1999-2004
10. KIPA Complete Top End Head Gasket Kit For TRX400EX TRX 400EX Sportrax 400 1999-2008 TRX400X TRX 400X
- 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
Peter
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