Top 8 400EX Big Bore Kit – Powersports Cylinder Heads

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1. GOOFIT

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GOOFIT 89mm 440CC Cylinder Liners Piston Rings Spark Plugs Gasket Kit ATV Quad for Honda Sportrax TRX400 TRX400EX TRX400X 1999-2008

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GOOFIT #ad - Reminder/note:to make sure you are buying the right product, please read the product description carefully or image size. Thank you for your attention.

If you have any problems or need help, welcome to contact us before or after your purchase. We will do our best to help you to solve it. Never Used. Brand new&High Quality. Size:modified cylinder Liners Std bore 89mm440cc. Mounting nut distance:87mm*80mm*90mm*80mm3. 42"*3. 14"*3. 54"3. 14"condition:100% New. Replacememt for the 1996-2004 honda xr400r, 1999-2008 honda sportrax TRX400EX, 2009, 2012-2014 Honda TRX400X. Improved casting design with larger cylinder Sleeve. Includes cylinder, piston set, Gasket, Spark Plugs GOOFIt Exquisite keychain and so on.
BrandGOOFIT #ad
ManufacturerGOOFIT #ad
Part NumberGroup-301

2. RANSOTO

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Replace 12100-HN1-A70 89mm 440cc Cylinder Piston Kit Compatible with Honda TRX400X TRX400EX Sportrax 12100-HN1-A70

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RANSOTO #ad - Warranty:for any reason, contact us directly. Content:cylinder 89mm, piston, 2* o-rings 2, Wristpin and 2* Circlips, Gasket, Piston Rings, Spark Plug.

It bring durable and reliable feature under extreme conditions. Compatible with honda atv 2008 trx400ex a, 2009 trx400x a, 2009 trx400x 3a, 2012 trx400x a, 2013-2014 trx400x ac 1999-2008 Sportrax 400. We offer a one-year warranty, if you are not satisfied with your purchase, 100% satisfaction guarantee. Replace part number : 12100-hn1-a70, 12251-hn1-003, 13011-kcy-670, 90601-ka5-000, 12100-kcy-670, 91301-428-003, 13101-kcy-670, 12191-kcy-672, 12100-kcy-670, 13111-kcy-670, 12191-KCY-672. Feature´╝Üwe adopt the highest grade materials to make our product.
BrandRANSOTO #ad
ManufacturerANODIZING #ad
Part NumberWWJ181

3. GPA MOTORS

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

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GPA MOTORS #ad - This product includes Piston Kit, Gasket Kit, OE Type Cylinder. The cylinder bore and Stroke is 85 mm x 70 mm. This product is tested to Exceed Original Equipment Standards and Performance. The products are direct Replacement Parts for Hassle-Free Installation. The cylinder Displacement 397cc.
BrandGPA MOTORS #ad
ManufacturerGPA MOTORS #ad
Height6.75 Inches
Length12.75 Inches
Width10 Inches
Part NumberRT1213
Warranty1 Year

4. Niche

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

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Niche #ad - Compatible with honda 1996-2004 XR400R. High quality replacement Cylinder 87mm Big Bore. Compatible with honda 1999-2008 Sportrax TRX400EX. Replaces oem part numbers: honda 12100-kcy-670, 12100-HN1-A70 . Compatible with honda 2009, 2012-2014 TRX400X.
BrandNiche #ad
ManufacturerMishon Inc #ad
Height5 Inches
Length7.5 Inches
Weight6.31 Pounds
Width6.5 Inches
Part Number519-CCY2234L

5. Niche

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NICHE Performance Camshaft forged Steel for Honda 1996-2014 TRX400 XR400R 14000-KCY-670 14000-HN1-000

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Niche #ad - Provides increased Midrange and Top-End Power Increase. High quality Replacement Camshaft Assembly. Designed to work with all Standard Bore and Big Bore Cylinder Kits up to 440cc. Compatible with the 1996-2004 honda xr400r, 1999-2008 honda sportrax TRX400EX, 2009, 2012-2014 Honda TRX400X. Replaces oem part numbers: honda 14000-kcy-670, 14000-hn1-000, 14000-HN1-A70 .
BrandNiche #ad
ManufacturerMishon Inc #ad
Height6.5 Inches
Length11.5 Inches
Weight1.13 Pounds
Width8.5 Inches
Part Number519-CCA2220M

6. Newera Auto

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NewJ's Big Bore Cylinder Piston Rings Top End Kit for Honda TRX400EX TRX 400EX 440cc 1999-2008

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Newera Auto #ad - Aftermarket replacement Cylinder Piston Big Bore Kit. Replacement part number: 12100-kcy-670, 12391-kcy-671, 13101-kcy-670, 12191-kcy-672, 12251-hn1-003, 13011-kcy-670, 90601-ka5-000, 13111-kcy-670, 14560-KCW-851. Direct replacement part for the old or broken one. Please check above compatibility list to make sure it fits your vehicle. Fits honda trx400ex 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008.
BrandNewera Auto #ad
Part Number12100

7. Wiseco

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Wiseco 4606M08700 87.00mm 10:1 Compression 416cc Motorcycle Piston Kit

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Wiseco #ad - Piston kits contain one piston, rings, piston pin and piston pin circlips. Wiseco's forged pistons are tougher and more durable than cast pistons, and will stand up to the abuse that high performance motorsport applications require. 416cc. 3425xc ring set.
BrandWiseco #ad
ManufacturerWiseco #ad
Height4.2 Inches
Length5 Inches
Width4.2 Inches
Part Number4606M08700
Model4606M08700

8. GPA MOTORS

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89mm 440cc Big Bore Cylinder Piston Gasket Kit for Honda Sportrax TRX400EX 99-08

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GPA MOTORS #ad - 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. The cylinder bore and Stroke is 89 mm x 70 mm. The cylinder displacement 440cc / Compression 10:1.
BrandGPA MOTORS #ad
ManufacturerGPA MOTORS #ad
Height6.5 Inches
Length12.5 Inches
Width10.5 Inches
Part NumberRT1214
Warranty1 Year