{"id":289732,"date":"2021-05-07T21:25:17","date_gmt":"2021-05-07T21:25:17","guid":{"rendered":"https:\/\/romanceuniversity.org\/blog\/medline-drop-arm-commode-2\/"},"modified":"2021-05-07T21:25:19","modified_gmt":"2021-05-07T21:25:19","slug":"400ex-big-bore-kit","status":"publish","type":"post","link":"https:\/\/romanceuniversity.org\/blog\/400ex-big-bore-kit\/","title":{"rendered":"400ex big bore kit"},"content":{"rendered":"<h1 style=\"text-align: center\">The Best 400ex big bore kit of 2025 &#8211; Reviewed and Top Rated<\/h1>\n<p><em>After hours researching and comparing all models on the market, we find out the Best 400ex big bore kit of 2025. Check our ranking below.<\/em><\/p>\n<p style=\"text-align: center\"><strong><span style=\"font-size: 13pt\">2,726 Reviews Scanned<\/span><\/strong><\/p>\n<p style=\"text-align: center\">\n<div class=\"aawp\">\n\n            \n            \n<div class=\"aawp-product aawp-product--horizontal aawp-product--style-standard aawp-product--bestseller aawp-product--ribbon\"  data-aawp-product-asin=\"B07GL6SKYD\" data-aawp-product-id=\"5411010\" data-aawp-tracking-id=\"romanceunivers-20\" data-aawp-product-title=\"NICHE 440cc Big Bore Cylinder Piston Kit for Honda Sportrax TRX400EX TRX400X XR400R 13111-KCY-670 91301-428-003\" data-aawp-geotargeting=\"true\">\n\n    <span class=\"aawp-product__ribbon aawp-product__ribbon--bestseller\">Rank No. #1<\/span>\n    <div class=\"aawp-product__thumb\">\n        <a class=\"aawp-product__image-link\"\n           href=\"https:\/\/www.amazon.com\/dp\/B07GL6SKYD?tag=romanceunivers-20&linkCode=ogi&th=1&psc=1&keywords=400ex%20big%20bore%20kit\" title=\"NICHE 440cc Big Bore Cylinder Piston Kit for Honda Sportrax TRX400EX TRX400X XR400R 13111-KCY-670 91301-428-003\" rel=\"nofollow noopener sponsored\" target=\"_blank\">\n            <img decoding=\"async\" class=\"aawp-product__image\" src=\"https:\/\/m.media-amazon.com\/images\/I\/51PpEYvJkXS._SL160_.jpg\" alt=\"NICHE 440cc Big Bore Cylinder Piston Kit for Honda Sportrax TRX400EX TRX400X XR400R 13111-KCY-670 91301-428-003\"  \/>\n        <\/a>\n\n            <\/div>\n\n    <div class=\"aawp-product__content\">\n        <a class=\"aawp-product__title\" href=\"https:\/\/www.amazon.com\/dp\/B07GL6SKYD?tag=romanceunivers-20&linkCode=ogi&th=1&psc=1&keywords=400ex%20big%20bore%20kit\" title=\"NICHE 440cc Big Bore Cylinder Piston Kit for Honda Sportrax TRX400EX TRX400X XR400R 13111-KCY-670 91301-428-003\" rel=\"nofollow noopener sponsored\" target=\"_blank\">\n            NICHE 440cc Big Bore Cylinder Piston Kit for Honda Sportrax TRX400EX TRX400X XR400R 13111-KCY-670 91301-428-003        <\/a>\n        <div class=\"aawp-product__description\">\n            <ul><li>Compatible with 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, 13011-KCY-670, 90601-KA5-000, 13101-KCY-670, 13111-KCY-670, 91301-428-003, 12251-HN1-003<\/li><li>Compatible with Honda 1996-2004 XR400R, 1999-2008 Sportrax TRX400EX, 2009, 2012-2014 TRX400X<\/li><li>Includes Cylinder (89mm), Piston, Piston Rings, O-Rings (2), Wristpin and Circlips (2)<\/li><li>Also Includes Base Gasket and Head Gasket<\/li><li>Cylinder Bore and Stroke 89.00mm x 70.00mm; Cylinder Material Aluminum; Cylinder Sleeve Coating None<\/li><\/ul>        <\/div>\n    <\/div>\n\n    <div class=\"aawp-product__footer\">\n\n        <div class=\"aawp-product__pricing\">\n            \n            \n                    <\/div>\n\n                <a class=\"aawp-button aawp-button--buy aawp-button aawp-button--green\" href=\"https:\/\/www.amazon.com\/dp\/B07GL6SKYD?tag=romanceunivers-20&#038;linkCode=ogi&#038;th=1&#038;psc=1&#038;keywords=400ex%20big%20bore%20kit\" title=\"View Product\" target=\"_blank\" rel=\"nofollow noopener sponsored\">View Product<\/a>\n            <\/div>\n\n<\/div>\n\n            \n            \n<div class=\"aawp-product aawp-product--horizontal aawp-product--style-standard aawp-product--bestseller aawp-product--ribbon\"  data-aawp-product-asin=\"B0895LH1C3\" data-aawp-product-id=\"5411011\" data-aawp-tracking-id=\"romanceunivers-20\" data-aawp-product-title=\"89mm 440CC Big Bore Cylinder Piston Gasket Top End Rebuild Kit Compatible with 1999-2014 TRX400X TRX400EX Sportrax XR400R Replace 12100-KCY-670 12100-HN1-A70\" data-aawp-geotargeting=\"true\">\n\n    <span class=\"aawp-product__ribbon aawp-product__ribbon--bestseller\">Rank No. #2<\/span>\n    <div class=\"aawp-product__thumb\">\n        <a class=\"aawp-product__image-link\"\n           href=\"https:\/\/www.amazon.com\/dp\/B0895LH1C3?tag=romanceunivers-20&linkCode=ogi&th=1&psc=1&keywords=400ex%20big%20bore%20kit\" title=\"89mm 440CC Big Bore Cylinder Piston Gasket Top End Rebuild Kit Compatible with 1999-2014 TRX400X TRX400EX Sportrax XR400R Replace 12100-KCY-670 12100-HN1-A70\" rel=\"nofollow noopener sponsored\" target=\"_blank\">\n            <img decoding=\"async\" class=\"aawp-product__image\" src=\"https:\/\/m.media-amazon.com\/images\/I\/417rTdzk4FL._SL160_.jpg\" alt=\"89mm 440CC Big Bore Cylinder Piston Gasket Top End Rebuild Kit Compatible with 1999-2014 TRX400X TRX400EX Sportrax XR400R Replace 12100-KCY-670 12100-HN1-A70\"  \/>\n        <\/a>\n\n            <\/div>\n\n    <div class=\"aawp-product__content\">\n        <a class=\"aawp-product__title\" href=\"https:\/\/www.amazon.com\/dp\/B0895LH1C3?tag=romanceunivers-20&linkCode=ogi&th=1&psc=1&keywords=400ex%20big%20bore%20kit\" title=\"89mm 440CC Big Bore Cylinder Piston Gasket Top End Rebuild Kit Compatible with 1999-2014 TRX400X TRX400EX Sportrax XR400R Replace 12100-KCY-670 12100-HN1-A70\" rel=\"nofollow noopener sponsored\" target=\"_blank\">\n            89mm 440CC Big Bore Cylinder Piston Gasket Top End Rebuild Kit Compatible with 1999-2014 TRX400X TRX400EX Sportrax XR400R Replace 12100-KCY-670 12100-HN1-A70        <\/a>\n        <div class=\"aawp-product__description\">\n            <ul><li>Compatible With: Honda 1999-2008 TRX400EX Sportrax 2009 TRX400X 2012-2014 TRX400X 1999-2004 XR400R<\/li><li>Content: Cylinder (89mm), Piston, Piston Rings, 2* O-Rings (2), Wristpin and 2* Circlips, Gasket, Spark Plug<\/li><li>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, 12191-KCY-672<\/li><li>Feature: We adopt the highest grade materials to make our product. It bring durable and reliable feature under extreme conditions.<\/li><li>Warranty: For any reason, if you are not satisfied with your purchase, contact us directly. We offer a one-year warranty, 100% satisfaction guarantee.<\/li><\/ul>        <\/div>\n    <\/div>\n\n    <div class=\"aawp-product__footer\">\n\n        <div class=\"aawp-product__pricing\">\n            \n            \n                    <\/div>\n\n                <a class=\"aawp-button aawp-button--buy aawp-button aawp-button--green\" href=\"https:\/\/www.amazon.com\/dp\/B0895LH1C3?tag=romanceunivers-20&#038;linkCode=ogi&#038;th=1&#038;psc=1&#038;keywords=400ex%20big%20bore%20kit\" title=\"View Product\" target=\"_blank\" rel=\"nofollow noopener sponsored\">View Product<\/a>\n            <\/div>\n\n<\/div>\n\n            \n            \n<div class=\"aawp-product aawp-product--horizontal aawp-product--style-standard aawp-product--bestseller aawp-product--ribbon\"  data-aawp-product-asin=\"B07RRBZ1JB\" data-aawp-product-id=\"4923435\" data-aawp-tracking-id=\"romanceunivers-20\" data-aawp-product-title=\"6 Sigma Carb Jet Kit fits 1999-13 Honda 400EX ATV 416 426 440 460 cc Big Bore Stroker Custom Performance Stage 1-3 Carburetor Jetting\" data-aawp-geotargeting=\"true\">\n\n    <span class=\"aawp-product__ribbon aawp-product__ribbon--bestseller\">Rank No. #3<\/span>\n    <div class=\"aawp-product__thumb\">\n        <a class=\"aawp-product__image-link\"\n           href=\"https:\/\/www.amazon.com\/dp\/B07RRBZ1JB?tag=romanceunivers-20&linkCode=ogi&th=1&psc=1&keywords=400ex%20big%20bore%20kit\" title=\"6 Sigma Carb Jet Kit fits 1999-13 Honda 400EX ATV 416 426 440 460 cc Big Bore Stroker Custom Performance Stage 1-3 Carburetor Jetting\" rel=\"nofollow noopener sponsored\" target=\"_blank\">\n            <img decoding=\"async\" class=\"aawp-product__image\" src=\"https:\/\/m.media-amazon.com\/images\/I\/514IGVmG-QL._SL160_.jpg\" alt=\"6 Sigma Carb Jet Kit fits 1999-13 Honda 400EX ATV 416 426 440 460 cc Big Bore Stroker Custom Performance Stage 1-3 Carburetor Jetting\"  \/>\n        <\/a>\n\n                    <div class=\"aawp-product__rating\">\n                <a class=\"aawp-star-rating aawp-star-rating--medium aawp-star-rating--v1\" href=\"https:\/\/www.amazon.com\/product-reviews\/B07RRBZ1JB?tag=romanceunivers-20&keywords=400ex%20big%20bore%20kit\" title=\"Reviews on Amazon\" rel=\"nofollow noopener sponsored\" target=\"_blank\"><span style=\"width: 100%;\"><\/span><\/a>\n                            <\/div>\n            <\/div>\n\n    <div class=\"aawp-product__content\">\n        <a class=\"aawp-product__title\" href=\"https:\/\/www.amazon.com\/dp\/B07RRBZ1JB?tag=romanceunivers-20&linkCode=ogi&th=1&psc=1&keywords=400ex%20big%20bore%20kit\" title=\"6 Sigma Carb Jet Kit fits 1999-13 Honda 400EX ATV 416 426 440 460 cc Big Bore Stroker Custom Performance Stage 1-3 Carburetor Jetting\" rel=\"nofollow noopener sponsored\" target=\"_blank\">\n            6 Sigma Carb Jet Kit fits 1999-13 Honda 400EX ATV 416 426 440 460 cc Big Bore Stroker Custom Performance Stage 1-3 Carburetor Jetting        <\/a>\n        <div class=\"aawp-product__description\">\n                    <\/div>\n    <\/div>\n\n    <div class=\"aawp-product__footer\">\n\n        <div class=\"aawp-product__pricing\">\n            \n            \n                    <\/div>\n\n                <a class=\"aawp-button aawp-button--buy aawp-button aawp-button--green\" href=\"https:\/\/www.amazon.com\/dp\/B07RRBZ1JB?tag=romanceunivers-20&#038;linkCode=ogi&#038;th=1&#038;psc=1&#038;keywords=400ex%20big%20bore%20kit\" title=\"View Product\" target=\"_blank\" rel=\"nofollow noopener sponsored\">View Product<\/a>\n            <\/div>\n\n<\/div>\n\n            \n            \n<div class=\"aawp-product aawp-product--horizontal aawp-product--style-standard aawp-product--bestseller aawp-product--ribbon\"  data-aawp-product-asin=\"B000UKIDOA\" data-aawp-product-id=\"5411012\" data-aawp-tracking-id=\"romanceunivers-20\" data-aawp-product-title=\"Wiseco W5942 Big Bore Replacement Gasket Kit - Fits  Honda TRX 400EX 1999-2008\" data-aawp-geotargeting=\"true\">\n\n    <span class=\"aawp-product__ribbon aawp-product__ribbon--bestseller\">Rank No. #4<\/span>\n    <div class=\"aawp-product__thumb\">\n        <a class=\"aawp-product__image-link\"\n           href=\"https:\/\/www.amazon.com\/dp\/B000UKIDOA?tag=romanceunivers-20&linkCode=ogi&th=1&psc=1&keywords=400ex%20big%20bore%20kit\" title=\"Wiseco W5942 Big Bore Replacement Gasket Kit - Fits: Honda TRX 400EX 1999-2008\" rel=\"nofollow noopener sponsored\" target=\"_blank\">\n            <img decoding=\"async\" class=\"aawp-product__image\" src=\"https:\/\/m.media-amazon.com\/images\/I\/516zgWjoUFL._SL160_.jpg\" alt=\"Wiseco W5942 Big Bore Replacement Gasket Kit - Fits: Honda TRX 400EX 1999-2008\"  \/>\n        <\/a>\n\n            <\/div>\n\n    <div class=\"aawp-product__content\">\n        <a class=\"aawp-product__title\" href=\"https:\/\/www.amazon.com\/dp\/B000UKIDOA?tag=romanceunivers-20&linkCode=ogi&th=1&psc=1&keywords=400ex%20big%20bore%20kit\" title=\"Wiseco W5942 Big Bore Replacement Gasket Kit - Fits: Honda TRX 400EX 1999-2008\" rel=\"nofollow noopener sponsored\" target=\"_blank\">\n            Wiseco W5942 Big Bore Replacement Gasket Kit - Fits: Honda TRX 400EX 1999-2008        <\/a>\n        <div class=\"aawp-product__description\">\n            <ul><li>Fits: Honda XR400 440 Overbore 1996-04, XR400 (87-88mm bore) 1996-05, TRX400EX (87-88mm bore) 1999-08, TRX400X (87-88mm bore) 2009-12<\/li><\/ul>        <\/div>\n    <\/div>\n\n    <div class=\"aawp-product__footer\">\n\n        <div class=\"aawp-product__pricing\">\n            \n            \n                    <\/div>\n\n                <a class=\"aawp-button aawp-button--buy aawp-button aawp-button--green\" href=\"https:\/\/www.amazon.com\/dp\/B000UKIDOA?tag=romanceunivers-20&#038;linkCode=ogi&#038;th=1&#038;psc=1&#038;keywords=400ex%20big%20bore%20kit\" title=\"View Product\" target=\"_blank\" rel=\"nofollow noopener sponsored\">View Product<\/a>\n            <\/div>\n\n<\/div>\n\n            \n            \n<div class=\"aawp-product aawp-product--horizontal aawp-product--style-standard aawp-product--bestseller aawp-product--ribbon\"  data-aawp-product-asin=\"B07SL8QN99\" data-aawp-product-id=\"3168511\" data-aawp-tracking-id=\"romanceunivers-20\" data-aawp-product-title=\"Cylinder Piston Gasket Kit FIts Honda Sportrax TRX400EX  1999-2008  Bore 85mm\" data-aawp-geotargeting=\"true\">\n\n    <span class=\"aawp-product__ribbon aawp-product__ribbon--bestseller\">Rank No. #5<\/span>\n    <div class=\"aawp-product__thumb\">\n        <a class=\"aawp-product__image-link\"\n           href=\"https:\/\/www.amazon.com\/dp\/B07SL8QN99?tag=romanceunivers-20&linkCode=ogi&th=1&psc=1&keywords=400ex%20big%20bore%20kit\" title=\"Cylinder Piston Gasket Kit FIts Honda Sportrax TRX400EX (1999-2008) Bore 85mm\" rel=\"nofollow noopener sponsored\" target=\"_blank\">\n            <img decoding=\"async\" class=\"aawp-product__image\" src=\"https:\/\/m.media-amazon.com\/images\/I\/31EZpiECbqL._SL160_.jpg\" alt=\"Cylinder Piston Gasket Kit FIts Honda Sportrax TRX400EX (1999-2008) Bore 85mm\"  \/>\n        <\/a>\n\n            <\/div>\n\n    <div class=\"aawp-product__content\">\n        <a class=\"aawp-product__title\" href=\"https:\/\/www.amazon.com\/dp\/B07SL8QN99?tag=romanceunivers-20&linkCode=ogi&th=1&psc=1&keywords=400ex%20big%20bore%20kit\" title=\"Cylinder Piston Gasket Kit FIts Honda Sportrax TRX400EX (1999-2008) Bore 85mm\" rel=\"nofollow noopener sponsored\" target=\"_blank\">\n            Cylinder Piston Gasket Kit FIts Honda Sportrax TRX400EX (1999-2008) Bore 85mm        <\/a>\n        <div class=\"aawp-product__description\">\n            <ul><li>Fits: Honda Sportrax TRX400 EX (1999-2008)<\/li><li>STD Bore 85mm \/ Displacement 397cc<\/li><li>This product is tested to Exceed Original Equipment Standards and Performance<\/li><li>This product includes Piston Kit, Gasket Kit, OE Type Cylinder<\/li><li>THIS ITEM HAS TO BE INSTALLED BY PROFESSIONAL MECHANICS SPECIALIZED IN ATV AND UTVs<\/li><\/ul>        <\/div>\n    <\/div>\n\n    <div class=\"aawp-product__footer\">\n\n        <div class=\"aawp-product__pricing\">\n            \n            \n                    <\/div>\n\n                <a class=\"aawp-button aawp-button--buy aawp-button aawp-button--green\" href=\"https:\/\/www.amazon.com\/dp\/B07SL8QN99?tag=romanceunivers-20&#038;linkCode=ogi&#038;th=1&#038;psc=1&#038;keywords=400ex%20big%20bore%20kit\" title=\"View Product\" target=\"_blank\" rel=\"nofollow noopener sponsored\">View Product<\/a>\n            <\/div>\n\n<\/div>\n\n            \n            \n<div class=\"aawp-product aawp-product--horizontal aawp-product--style-standard aawp-product--bestseller aawp-product--ribbon\"  data-aawp-product-asin=\"B01NBY4SQL\" data-aawp-product-id=\"5397742\" data-aawp-tracking-id=\"romanceunivers-20\" data-aawp-product-title=\"TOP NOTCH PARTS 440cc BIG BORE CYLINDER PISTON RINGS TOP END KIT FOR FITS HONDA TRX400EX TRX400X 1999-2014\" data-aawp-geotargeting=\"true\">\n\n    <span class=\"aawp-product__ribbon aawp-product__ribbon--bestseller\">Rank No. #6<\/span>\n    <div class=\"aawp-product__thumb\">\n        <a class=\"aawp-product__image-link\"\n           href=\"https:\/\/www.amazon.com\/dp\/B01NBY4SQL?tag=romanceunivers-20&linkCode=ogi&th=1&psc=1&keywords=400ex%20big%20bore%20kit\" title=\"TOP NOTCH PARTS 440cc BIG BORE CYLINDER PISTON RINGS TOP END KIT FOR FITS HONDA TRX400EX TRX400X 1999-2014\" rel=\"nofollow noopener sponsored\" target=\"_blank\">\n            <img decoding=\"async\" class=\"aawp-product__image\" src=\"https:\/\/m.media-amazon.com\/images\/I\/51DJ2Av2T3L._SL160_.jpg\" alt=\"TOP NOTCH PARTS 440cc BIG BORE CYLINDER PISTON RINGS TOP END KIT FOR FITS HONDA TRX400EX TRX400X 1999-2014\"  \/>\n        <\/a>\n\n            <\/div>\n\n    <div class=\"aawp-product__content\">\n        <a class=\"aawp-product__title\" href=\"https:\/\/www.amazon.com\/dp\/B01NBY4SQL?tag=romanceunivers-20&linkCode=ogi&th=1&psc=1&keywords=400ex%20big%20bore%20kit\" title=\"TOP NOTCH PARTS 440cc BIG BORE CYLINDER PISTON RINGS TOP END KIT FOR FITS HONDA TRX400EX TRX400X 1999-2014\" rel=\"nofollow noopener sponsored\" target=\"_blank\">\n            TOP NOTCH PARTS 440cc BIG BORE CYLINDER PISTON RINGS TOP END KIT FOR FITS HONDA TRX400EX TRX400X 1999-2014        <\/a>\n        <div class=\"aawp-product__description\">\n            <ul><li>2 YEARS XC AND GNCC RACING TESTED<\/li><li>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! equal to or better than OEM<\/li><li>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<\/li><li>Fits for 1999 - 2008 Honda TRX 400ex.<\/li><\/ul>        <\/div>\n    <\/div>\n\n    <div class=\"aawp-product__footer\">\n\n        <div class=\"aawp-product__pricing\">\n            \n            \n                    <\/div>\n\n                <a class=\"aawp-button aawp-button--buy aawp-button aawp-button--green\" href=\"https:\/\/www.amazon.com\/dp\/B01NBY4SQL?tag=romanceunivers-20&#038;linkCode=ogi&#038;th=1&#038;psc=1&#038;keywords=400ex%20big%20bore%20kit\" title=\"View Product\" target=\"_blank\" rel=\"nofollow noopener sponsored\">View Product<\/a>\n            <\/div>\n\n<\/div>\n\n            \n            \n<div class=\"aawp-product aawp-product--horizontal aawp-product--style-standard aawp-product--bestseller aawp-product--ribbon\"  data-aawp-product-asin=\"B01IPZVRX0\" data-aawp-product-id=\"4923436\" data-aawp-tracking-id=\"romanceunivers-20\" data-aawp-product-title=\"50 Caliber Racing 440cc 89mm Big Bore Kit - Fits 1996-2016 Honda XR400R TRX400X TRX400EX Models [4449A13]\" data-aawp-geotargeting=\"true\">\n\n    <span class=\"aawp-product__ribbon aawp-product__ribbon--bestseller\">Rank No. #7<\/span>\n    <div class=\"aawp-product__thumb\">\n        <a class=\"aawp-product__image-link\"\n           href=\"https:\/\/www.amazon.com\/dp\/B01IPZVRX0?tag=romanceunivers-20&linkCode=ogi&th=1&psc=1&keywords=400ex%20big%20bore%20kit\" title=\"50 Caliber Racing 440cc 89mm Big Bore Kit - Fits 1996-2016 Honda XR400R, TRX400X, TRX400EX Models [4449A13]\" rel=\"nofollow noopener sponsored\" target=\"_blank\">\n            <img decoding=\"async\" class=\"aawp-product__image\" src=\"https:\/\/m.media-amazon.com\/images\/I\/41fD4D7LwRL._SL160_.jpg\" alt=\"50 Caliber Racing 440cc 89mm Big Bore Kit - Fits 1996-2016 Honda XR400R, TRX400X, TRX400EX Models [4449A13]\"  \/>\n        <\/a>\n\n                    <div class=\"aawp-product__rating\">\n                <a class=\"aawp-star-rating aawp-star-rating--medium aawp-star-rating--v1\" href=\"https:\/\/www.amazon.com\/product-reviews\/B01IPZVRX0?tag=romanceunivers-20&keywords=400ex%20big%20bore%20kit\" title=\"Reviews on Amazon\" rel=\"nofollow noopener sponsored\" target=\"_blank\"><span style=\"width: 100%;\"><\/span><\/a>\n                            <\/div>\n            <\/div>\n\n    <div class=\"aawp-product__content\">\n        <a class=\"aawp-product__title\" href=\"https:\/\/www.amazon.com\/dp\/B01IPZVRX0?tag=romanceunivers-20&linkCode=ogi&th=1&psc=1&keywords=400ex%20big%20bore%20kit\" title=\"50 Caliber Racing 440cc 89mm Big Bore Kit - Fits 1996-2016 Honda XR400R, TRX400X, TRX400EX Models [4449A13]\" rel=\"nofollow noopener sponsored\" target=\"_blank\">\n            50 Caliber Racing 440cc 89mm Big Bore Kit - Fits 1996-2016 Honda XR400R, TRX400X, TRX400EX Models [4449A13]        <\/a>\n        <div class=\"aawp-product__description\">\n            <ul><li>50 Caliber Racing Big Bore Top End Kit<\/li><li>Fits Honda XR400R & TRX400ex from 1996 - 2016<\/li><li>10:1 Piston with Anodized Dome - 89mm Cylinder - 440cc<\/li><li>Cylinder - Piston - Rings - Clips - Wrist Pin - Gasket Set - Spark Plug<\/li><\/ul>        <\/div>\n    <\/div>\n\n    <div class=\"aawp-product__footer\">\n\n        <div class=\"aawp-product__pricing\">\n            \n            \n                    <\/div>\n\n                <a class=\"aawp-button aawp-button--buy aawp-button aawp-button--green\" href=\"https:\/\/www.amazon.com\/dp\/B01IPZVRX0?tag=romanceunivers-20&#038;linkCode=ogi&#038;th=1&#038;psc=1&#038;keywords=400ex%20big%20bore%20kit\" title=\"View Product\" target=\"_blank\" rel=\"nofollow noopener sponsored\">View Product<\/a>\n            <\/div>\n\n<\/div>\n\n            \n            \n<div class=\"aawp-product aawp-product--horizontal aawp-product--style-standard aawp-product--bestseller aawp-product--ribbon\"  data-aawp-product-asin=\"B08RDNCRQG\" data-aawp-product-id=\"3935588\" data-aawp-tracking-id=\"romanceunivers-20\" data-aawp-product-title=\"MOFANS Fit for\" data-aawp-geotargeting=\"true\">\n\n    <span class=\"aawp-product__ribbon aawp-product__ribbon--bestseller\">Rank No. #8<\/span>\n    <div class=\"aawp-product__thumb\">\n        <a class=\"aawp-product__image-link\"\n           href=\"https:\/\/www.amazon.com\/dp\/B08RDNCRQG?tag=romanceunivers-20&linkCode=ogi&th=1&psc=1&keywords=400ex%20big%20bore%20kit\" title=\"MOFANS Fit for\" rel=\"nofollow noopener sponsored\" target=\"_blank\">\n            <img decoding=\"async\" class=\"aawp-product__image\" src=\"https:\/\/m.media-amazon.com\/images\/I\/01RmK+J4pJL.gif._SL160_.jpg\" alt=\"MOFANS Fit for\"  \/>\n        <\/a>\n\n            <\/div>\n\n    <div class=\"aawp-product__content\">\n        <a class=\"aawp-product__title\" href=\"https:\/\/www.amazon.com\/dp\/B08RDNCRQG?tag=romanceunivers-20&linkCode=ogi&th=1&psc=1&keywords=400ex%20big%20bore%20kit\" title=\"MOFANS Fit for\" rel=\"nofollow noopener sponsored\" target=\"_blank\">\n            MOFANS Fit for        <\/a>\n        <div class=\"aawp-product__description\">\n                    <\/div>\n    <\/div>\n\n    <div class=\"aawp-product__footer\">\n\n        <div class=\"aawp-product__pricing\">\n            \n            \n                    <\/div>\n\n                <a class=\"aawp-button aawp-button--buy aawp-button aawp-button--green\" href=\"https:\/\/www.amazon.com\/dp\/B08RDNCRQG?tag=romanceunivers-20&#038;linkCode=ogi&#038;th=1&#038;psc=1&#038;keywords=400ex%20big%20bore%20kit\" title=\"View Product\" target=\"_blank\" rel=\"nofollow noopener sponsored\">View Product<\/a>\n            <\/div>\n\n<\/div>\n\n            \n            \n<div class=\"aawp-product aawp-product--horizontal aawp-product--style-standard aawp-product--bestseller aawp-product--ribbon\"  data-aawp-product-asin=\"B07NQ9C6XN\" data-aawp-product-id=\"5411013\" data-aawp-tracking-id=\"romanceunivers-20\" data-aawp-product-title=\"labwork 89MM Big Bore Top End Gasket Replacement for Honda Sportrax 400 TRX400EX 1999-2004\" data-aawp-geotargeting=\"true\">\n\n    <span class=\"aawp-product__ribbon aawp-product__ribbon--bestseller\">Rank No. #9<\/span>\n    <div class=\"aawp-product__thumb\">\n        <a class=\"aawp-product__image-link\"\n           href=\"https:\/\/www.amazon.com\/dp\/B07NQ9C6XN?tag=romanceunivers-20&linkCode=ogi&th=1&psc=1&keywords=400ex%20big%20bore%20kit\" title=\"labwork 89MM Big Bore Top End Gasket Replacement for Honda Sportrax 400 TRX400EX 1999-2004\" rel=\"nofollow noopener sponsored\" target=\"_blank\">\n            <img decoding=\"async\" class=\"aawp-product__image\" src=\"https:\/\/m.media-amazon.com\/images\/I\/412k4CqGWzL._SL160_.jpg\" alt=\"labwork 89MM Big Bore Top End Gasket Replacement for Honda Sportrax 400 TRX400EX 1999-2004\"  \/>\n        <\/a>\n\n            <\/div>\n\n    <div class=\"aawp-product__content\">\n        <a class=\"aawp-product__title\" href=\"https:\/\/www.amazon.com\/dp\/B07NQ9C6XN?tag=romanceunivers-20&linkCode=ogi&th=1&psc=1&keywords=400ex%20big%20bore%20kit\" title=\"labwork 89MM Big Bore Top End Gasket Replacement for Honda Sportrax 400 TRX400EX 1999-2004\" rel=\"nofollow noopener sponsored\" target=\"_blank\">\n            labwork 89MM Big Bore Top End Gasket Replacement for Honda Sportrax 400 TRX400EX 1999-2004        <\/a>\n        <div class=\"aawp-product__description\">\n            <ul><li>Fitment - Top end gasket replacement for Honda Sportrax 400 TRX400EX<\/li><li>Performance - Good sealing performance, satisfy the application requirement<\/li><li>Feature - Strict production standards, long use time<\/li><li>Installation - Direct replacement for a proper and easy installation<\/li><li>Note - Please compare your original part with our product display pictures, make sure they have the same<\/li><\/ul>        <\/div>\n    <\/div>\n\n    <div class=\"aawp-product__footer\">\n\n        <div class=\"aawp-product__pricing\">\n            \n            \n                    <\/div>\n\n                <a class=\"aawp-button aawp-button--buy aawp-button aawp-button--green\" href=\"https:\/\/www.amazon.com\/dp\/B07NQ9C6XN?tag=romanceunivers-20&#038;linkCode=ogi&#038;th=1&#038;psc=1&#038;keywords=400ex%20big%20bore%20kit\" title=\"View Product\" target=\"_blank\" rel=\"nofollow noopener sponsored\">View Product<\/a>\n            <\/div>\n\n<\/div>\n\n            \n            \n<div class=\"aawp-product aawp-product--horizontal aawp-product--style-standard aawp-product--bestseller aawp-product--ribbon\"  data-aawp-product-asin=\"B07PWW2TKC\" data-aawp-product-id=\"4923437\" data-aawp-tracking-id=\"romanceunivers-20\" data-aawp-product-title=\"New 89MM Big Bore Top End Gasket Kit Replacement for Honda TRX400EX TRX 400EX 440 1999-2004\" data-aawp-geotargeting=\"true\">\n\n    <span class=\"aawp-product__ribbon aawp-product__ribbon--bestseller\">Rank No. #10<\/span>\n    <div class=\"aawp-product__thumb\">\n        <a class=\"aawp-product__image-link\"\n           href=\"https:\/\/www.amazon.com\/dp\/B07PWW2TKC?tag=romanceunivers-20&linkCode=ogi&th=1&psc=1&keywords=400ex%20big%20bore%20kit\" title=\"New 89MM Big Bore Top End Gasket Kit Replacement for Honda TRX400EX TRX 400EX 440 1999-2004\" rel=\"nofollow noopener sponsored\" target=\"_blank\">\n            <img decoding=\"async\" class=\"aawp-product__image\" src=\"https:\/\/m.media-amazon.com\/images\/I\/51duf3ZhfML._SL160_.jpg\" alt=\"New 89MM Big Bore Top End Gasket Kit Replacement for Honda TRX400EX TRX 400EX 440 1999-2004\"  \/>\n        <\/a>\n\n                    <div class=\"aawp-product__rating\">\n                <a class=\"aawp-star-rating aawp-star-rating--medium aawp-star-rating--v1\" href=\"https:\/\/www.amazon.com\/product-reviews\/B07PWW2TKC?tag=romanceunivers-20&keywords=400ex%20big%20bore%20kit\" title=\"Reviews on Amazon\" rel=\"nofollow noopener sponsored\" target=\"_blank\"><span style=\"width: 80%;\"><\/span><\/a>\n                            <\/div>\n            <\/div>\n\n    <div class=\"aawp-product__content\">\n        <a class=\"aawp-product__title\" href=\"https:\/\/www.amazon.com\/dp\/B07PWW2TKC?tag=romanceunivers-20&linkCode=ogi&th=1&psc=1&keywords=400ex%20big%20bore%20kit\" title=\"New 89MM Big Bore Top End Gasket Kit Replacement for Honda TRX400EX TRX 400EX 440 1999-2004\" rel=\"nofollow noopener sponsored\" target=\"_blank\">\n            New 89MM Big Bore Top End Gasket Kit Replacement for Honda TRX400EX TRX 400EX 440 1999-2004        <\/a>\n        <div class=\"aawp-product__description\">\n            <ul><li>Replacement for Honda Sportrax 400 TRX400EX 1999-2004<\/li><li>Kit comes complete with head and base gaskets and other necessary gaskets and parts to repair the top end on your motorcycle or ATV<\/li><li>Gasket with great sealing performance, leakage prevention<\/li><li>Direct replacement for a proper fit and easy installation, quality materials used<\/li><li>Please carefully compare the product with your original item, make sure the model fit your need<\/li><\/ul>        <\/div>\n    <\/div>\n\n    <div class=\"aawp-product__footer\">\n\n        <div class=\"aawp-product__pricing\">\n            \n            \n                    <\/div>\n\n                <a class=\"aawp-button aawp-button--buy aawp-button aawp-button--green\" href=\"https:\/\/www.amazon.com\/dp\/B07PWW2TKC?tag=romanceunivers-20&#038;linkCode=ogi&#038;th=1&#038;psc=1&#038;keywords=400ex%20big%20bore%20kit\" title=\"View Product\" target=\"_blank\" rel=\"nofollow noopener sponsored\">View Product<\/a>\n            <\/div>\n\n<\/div>\n\n    \n<\/div>\n<p class=\"aawp-disclaimer\">Last update on 2023-06-14 \/ Affiliate links \/ Images from Amazon Product Advertising API<\/p>\n<h2><strong>How Do You Buy The Best 400ex big bore kit?<\/strong><\/h2>\n<p>Do you get stressed out thinking about shopping for a great 400ex big bore kit? Do doubts keep creeping into your mind? We understand, because we&#8217;ve already gone through the whole process of researching 400ex big bore kit, which is why we have assembled a comprehensive list of the greatest 400ex big bore kit available in the current market. We&#8217;ve also come up with a list of questions that you probably have yourself.<\/p>\n<p>We&#8217;ve done the best we can with our thoughts and recommendations, but it&#8217;s still crucial that you do thorough research on your own for 400ex big bore kit that you consider buying. Your questions might include the following:<\/p>\n<ul>\n<li>Is it worth buying an <strong>400ex big bore kit<\/strong>?<\/li>\n<li>What benefits are there with buying an <em>400ex big bore kit<\/em>?<\/li>\n<li>What factors deserve consideration when shopping for an effective <span style=\"text-decoration: underline\">400ex big bore kit<\/span>?<\/li>\n<li>Why is it crucial to invest in any <strong>400ex big bore kit<\/strong>, much less the best one?<\/li>\n<li>Which <em>400ex big bore kit<\/em> are good in the current market?<\/li>\n<li>Where can you find information like this about <span style=\"text-decoration: underline\">400ex big bore kit<\/span>?<\/li>\n<\/ul>\n<p>We&#8217;re convinced that you likely have far more questions than just these regarding 400ex big bore 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.<\/p>\n<p>Potential sources can include <strong>buying guides for 400ex big bore kit<\/strong>, 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 big bore kit. Make sure that you are only using trustworthy and credible websites and sources.<\/p>\n<p>We provide an 400ex big bore 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 big bore kit currently available on the market.<\/p>\n<p>This technology we use to assemble our list depends on a variety of factors, including but not limited to the following:<\/p>\n<ol>\n<li><strong>Brand Value<\/strong>: Every brand of 400ex big bore kit has a value all its own. Most brands offer some sort of unique selling proposition that&#8217;s supposed to bring something different to the table than their competitors.<\/li>\n<li><strong>Features:<\/strong> What bells and whistles matter for an 400ex big bore kit?<\/li>\n<li><strong>Specifications<\/strong>: How powerful they are can be measured.<\/li>\n<li><strong>Product Value<\/strong>: This simply is how much bang for the buck you get from your 400ex big bore kit.<\/li>\n<li><strong>Customer Ratings<\/strong>: Number ratings grade 400ex big bore kit objectively.<\/li>\n<li><strong>Customer Reviews<\/strong>: Closely related to ratings, these paragraphs give you first-hand and detailed information from real-world users about their 400ex big bore kit.<\/li>\n<li><strong>Product Quality<\/strong>: You don&#8217;t always get what you pay for with an 400ex big bore kit, sometimes less, and sometimes more.<\/li>\n<li><strong>Product Reliability<\/strong>: How sturdy and durable an 400ex big bore kit is should be an indication of how long it will work out for you.<\/li>\n<\/ol>\n<p>We always remember that maintaining 400ex big bore 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.<\/p>\n<p>If you think that anything we present here regarding 400ex big bore kit is irrelevant, incorrect, misleading, or erroneous, then please let us know promptly! We&#8217;re here for you all the time. <a href=\"https:\/\/romanceuniversity.org\/contact\/\">Contact us here<\/a>. Or You can <a href=\"https:\/\/romanceuniversity.org\/about-us\/\">read more about us<\/a> to see our vision.<\/p>\n<h4>Related Post:<\/h4>\n<ul>\n<li><a href=\"https:\/\/romanceuniversity.org\/blog\/400ex-top-end-kit\"><span>400ex top end kit<\/span><\/a><\/li>\n<li><a href=\"https:\/\/romanceuniversity.org\/blog\/2000-honda-400ex-plastics\"><span>2000 honda 400ex plastics<\/span><\/a><\/li>\n<li><a href=\"https:\/\/romanceuniversity.org\/blog\/2004-honda-400ex-plastics\"><span>2004 honda 400ex plastics<\/span><\/a><\/li>\n<li><a href=\"https:\/\/romanceuniversity.org\/blog\/2002-honda-400ex-plastics\"><span>2002 honda 400ex plastics<\/span><\/a><\/li>\n<li><a href=\"https:\/\/romanceuniversity.org\/blog\/80cc-big-bore-kit\"><span>80cc big bore kit<\/span><\/a><\/li>\n<li><a href=\"https:\/\/romanceuniversity.org\/blog\/50cc-big-bore-kit\"><span>50cc big bore kit<\/span><\/a><\/li>\n<li><a href=\"https:\/\/romanceuniversity.org\/blog\/100cc-big-bore-kit\"><span>100cc big bore kit<\/span><\/a><\/li>\n<li><a href=\"https:\/\/romanceuniversity.org\/blog\/stihl-036-pro-big-bore-kit\"><span>Stihl 036 Pro Big Bore Kit<\/span><\/a><\/li>\n<li><a href=\"https:\/\/romanceuniversity.org\/blog\/gy6-big-bore-kit-200cc\"><span>Gy6 Big Bore Kit 200Cc<\/span><\/a><\/li>\n<li><a href=\"https:\/\/romanceuniversity.org\/blog\/bore-sight-kit\"><span>bore sight kit<\/span><\/a><\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>The Best 400ex big bore kit of 2025 &#8211; Reviewed and Top Rated After hours researching and comparing all models on the market, we find out the Best 400ex big bore kit of 2025. Check our ranking below. Reviews Scanned How Do You Buy The Best 400ex big bore kit? Do you get stressed out&hellip;&nbsp;<a href=\"https:\/\/romanceuniversity.org\/blog\/400ex-big-bore-kit\/\" rel=\"bookmark\">Read More &raquo;<span class=\"screen-reader-text\">400ex big bore kit<\/span><\/a><\/p>\n","protected":false},"author":2,"featured_media":127,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"neve_meta_sidebar":"","neve_meta_container":"","neve_meta_enable_content_width":"off","neve_meta_content_width":0,"neve_meta_title_alignment":"","neve_meta_author_avatar":"","neve_post_elements_order":"","neve_meta_disable_header":"","neve_meta_disable_footer":"","neve_meta_disable_title":"on","footnotes":""},"categories":[6],"tags":[],"class_list":["post-289732","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-deals-today"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/romanceuniversity.org\/blog\/wp-json\/wp\/v2\/posts\/289732","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/romanceuniversity.org\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/romanceuniversity.org\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/romanceuniversity.org\/blog\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/romanceuniversity.org\/blog\/wp-json\/wp\/v2\/comments?post=289732"}],"version-history":[{"count":0,"href":"https:\/\/romanceuniversity.org\/blog\/wp-json\/wp\/v2\/posts\/289732\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/romanceuniversity.org\/blog\/wp-json\/wp\/v2\/media\/127"}],"wp:attachment":[{"href":"https:\/\/romanceuniversity.org\/blog\/wp-json\/wp\/v2\/media?parent=289732"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/romanceuniversity.org\/blog\/wp-json\/wp\/v2\/categories?post=289732"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/romanceuniversity.org\/blog\/wp-json\/wp\/v2\/tags?post=289732"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}