{"product_id":"je-forged-12-1-piston-rebuild-kit-honda-trx400ex-xr400r","title":"JE Forged 12:1 Piston Cylinder Rebuild Kit Honda TRX400EX XR400R 85mm Stock Bore","description":"\u003cp style=\"text-align: center;\"\u003e\u003cspan style=\"font-size: 0.000000px; color: transparent;\"\u003eRestore Honda TRX400X and XR400R performance with JE forged piston technology, stock bore cylinder, and premium gasket sealing. Honda TRX400X XR400R JE Piston Cylinder Rebuild Kit\u003c\/span\u003e\u003c\/p\u003e \u003cp style=\"text-align: center;\"\u003e\u003c\/p\u003e\u003cdiv style=\"max-width:800px;margin:0 auto;font-family:Arial,Helvetica,sans-serif;line-height:1.5;color:#222;\"\u003e \u003ch2 style=\"text-align:center;font-size:26px;margin:0 0 12px 0;\"\u003e \u003cstrong\u003eHonda TRX400EX TRX400X XR400R 12:1 JE Piston Cylinder Top End Rebuild Kit\u003c\/strong\u003e \u003c\/h2\u003e \u003ch3 style=\"color:#c00;margin:20px 0 6px;text-align:center;\"\u003e📖 Product Description\u003c\/h3\u003e \u003cp style=\"text-align:center;margin:0 20px;\"\u003e \u003cspan style=\"font-size:16px;\"\u003e Restore and upgrade the performance of your Honda sport ATV or XR dirt bike with this premium \u003cstrong\u003eBPRATV Complete Top End Rebuild Kit\u003c\/strong\u003e featuring a \u003cstrong\u003e12:1 High Compression JE Forged Racing Piston\u003c\/strong\u003e, new \u003cstrong\u003e85mm stock bore cylinder\u003c\/strong\u003e, and a \u003cstrong\u003eCometic MLS top end gasket kit\u003c\/strong\u003e. Designed specifically for the legendary \u003cstrong\u003eHonda TRX400EX, TRX400X, and XR400R\u003c\/strong\u003e platforms, this complete package delivers increased compression, stronger throttle response, improved torque, and dependable durability for aggressive trail riding, racing, and dune performance. \u003c\/span\u003e \u003c\/p\u003e\n\u003cp style=\"text-align:center;margin:0 20px;\"\u003e\u003cspan style=\"font-size:16px;\"\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/p\u003e \u003cp style=\"text-align:center;margin:0 20px;\"\u003e \u003cspan style=\"font-size:16px;\"\u003e The included \u003cstrong\u003eJE forged piston\u003c\/strong\u003e is engineered for high-performance applications and provides superior strength compared to cast pistons while maintaining excellent reliability. Combined with the precision-machined \u003cstrong\u003eBPRATV aftermarket cylinder\u003c\/strong\u003e and premium \u003cstrong\u003eCometic MLS head gasket\u003c\/strong\u003e, this kit offers excellent sealing and long-lasting performance for both pump gas and race gas applications. \u003c\/span\u003e \u003c\/p\u003e \u003ch3 style=\"color:#c00;margin:20px 0 6px;text-align:center;\"\u003e🔥 Key Features \u0026amp; Benefits\u003c\/h3\u003e \u003cp style=\"text-align:center;margin:0 20px;\"\u003e \u003cspan style=\"font-size:16px;\"\u003e This complete Honda 400 top end rebuild kit is engineered for riders looking to restore engine reliability while adding aggressive high-compression performance. Every component is brand new and designed for direct compatibility with OEM Honda engine components. \u003c\/span\u003e \u003c\/p\u003e\n\u003cp style=\"text-align:center;margin:0 20px;\"\u003e\u003cspan style=\"font-size:16px;\"\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/p\u003e \u003cul\u003e \u003cli\u003e\u003cspan style=\"font-size:16px;\"\u003e\u003cstrong\u003e12:1 high compression JE forged piston\u003c\/strong\u003e delivers improved power and throttle response\u003c\/span\u003e\u003c\/li\u003e \u003cli\u003e\u003cspan style=\"font-size:16px;\"\u003e\u003cstrong\u003e85mm stock bore cylinder\u003c\/strong\u003e provides direct OEM-style replacement fitment\u003c\/span\u003e\u003c\/li\u003e \u003cli\u003e\u003cspan style=\"font-size:16px;\"\u003e\u003cstrong\u003eCometic MLS head gasket\u003c\/strong\u003e offers superior combustion sealing durability\u003c\/span\u003e\u003c\/li\u003e \u003cli\u003e\u003cspan style=\"font-size:16px;\"\u003e\u003cstrong\u003eForged piston construction\u003c\/strong\u003e handles high heat and aggressive riding conditions\u003c\/span\u003e\u003c\/li\u003e \u003cli\u003e\u003cspan style=\"font-size:16px;\"\u003e\u003cstrong\u003eCompatible with OEM components\u003c\/strong\u003e for simplified installation\u003c\/span\u003e\u003c\/li\u003e \u003cli\u003e\u003cspan style=\"font-size:16px;\"\u003e\u003cstrong\u003eWorks with pump gas or race gas\u003c\/strong\u003e depending on tuning and setup\u003c\/span\u003e\u003c\/li\u003e \u003cli\u003e\u003cspan style=\"font-size:16px;\"\u003e\u003cstrong\u003eIdeal for trail, dune, race, and performance rebuilds\u003c\/strong\u003e\u003c\/span\u003e\u003c\/li\u003e \u003c\/ul\u003e \u003ch3 style=\"color:#c00;margin:20px 0 6px;text-align:center;\"\u003e📦 Product Contents\u003c\/h3\u003e \u003cul\u003e \u003cli\u003e\u003cspan style=\"font-size:16px;\"\u003eNEW BPRATV 85mm stock bore aftermarket cylinder\u003c\/span\u003e\u003c\/li\u003e \u003cli\u003e\u003cspan style=\"font-size:16px;\"\u003e12:1 high compression 85mm JE forged piston\u003c\/span\u003e\u003c\/li\u003e \u003cli\u003e\u003cspan style=\"font-size:16px;\"\u003ePiston ring set\u003c\/span\u003e\u003c\/li\u003e \u003cli\u003e\u003cspan style=\"font-size:16px;\"\u003eWrist pin\u003c\/span\u003e\u003c\/li\u003e \u003cli\u003e\u003cspan style=\"font-size:16px;\"\u003ePiston circlips\u003c\/span\u003e\u003c\/li\u003e \u003cli\u003e\u003cspan style=\"font-size:16px;\"\u003eCometic complete top end gasket kit\u003c\/span\u003e\u003c\/li\u003e \u003cli\u003e\u003cspan style=\"font-size:16px;\"\u003eMLS multi-layer steel head gasket\u003c\/span\u003e\u003c\/li\u003e \u003c\/ul\u003e \u003ch3 style=\"color:#c00;margin:20px 0 6px;text-align:center;\"\u003e✅ Compatibility\u003c\/h3\u003e \u003cp style=\"text-align:center;margin:0 20px;\"\u003e \u003cspan style=\"font-size:16px;\"\u003e This complete top end rebuild kit is compatible with Honda air-cooled 397cc four-stroke engines used in multiple ATV and off-road motorcycle platforms. \u003c\/span\u003e \u003c\/p\u003e \u003cul\u003e \u003cli\u003e\u003cspan style=\"font-size:16px;\"\u003e\u003cstrong\u003eHonda TRX400EX\u003c\/strong\u003e — 1999-2008\u003c\/span\u003e\u003c\/li\u003e \u003cli\u003e\u003cspan style=\"font-size:16px;\"\u003e\u003cstrong\u003eHonda TRX400X\u003c\/strong\u003e — 2009-2014\u003c\/span\u003e\u003c\/li\u003e \u003cli\u003e\u003cspan style=\"font-size:16px;\"\u003e\u003cstrong\u003eHonda XR400R\u003c\/strong\u003e — 1996-2004\u003c\/span\u003e\u003c\/li\u003e \u003cli\u003e\u003cspan style=\"font-size:16px;\"\u003eCompatible with OEM cylinder head and engine components\u003c\/span\u003e\u003c\/li\u003e \u003cli\u003e\u003cspan style=\"font-size:16px;\"\u003eDesigned for 85mm stock bore engine configurations\u003c\/span\u003e\u003c\/li\u003e \u003c\/ul\u003e \u003ch3 style=\"color:#c00;margin:20px 0 6px;text-align:center;\"\u003e❓ FAQ\u003c\/h3\u003e \u003cul\u003e \u003cli\u003e \u003cspan style=\"font-size:16px;\"\u003e\u003cstrong\u003eQ:\u003c\/strong\u003e Is this a stock bore rebuild kit?\u003c\/span\u003e \u003cp style=\"text-align:left;margin:0 0 10px 0;\"\u003e \u003cspan style=\"font-size:16px;\"\u003e\u003cstrong\u003eA:\u003c\/strong\u003e Yes. This kit uses an \u003cstrong\u003e85mm stock bore cylinder and piston configuration\u003c\/strong\u003e designed as a direct replacement for OEM specifications.\u003c\/span\u003e \u003c\/p\u003e \u003c\/li\u003e \u003cli\u003e \u003cspan style=\"font-size:16px;\"\u003e\u003cstrong\u003eQ:\u003c\/strong\u003e Does this kit include everything needed for a top end rebuild?\u003c\/span\u003e \u003cp style=\"text-align:left;margin:0 0 10px 0;\"\u003e \u003cspan style=\"font-size:16px;\"\u003e\u003cstrong\u003eA:\u003c\/strong\u003e Yes. The kit includes the cylinder, JE forged piston, rings, wrist pin, circlips, and a complete Cometic top end gasket kit with MLS head gasket.\u003c\/span\u003e \u003c\/p\u003e \u003c\/li\u003e \u003cli\u003e \u003cspan style=\"font-size:16px;\"\u003e\u003cstrong\u003eQ:\u003c\/strong\u003e Can this piston run on pump gas?\u003c\/span\u003e \u003cp style=\"text-align:left;margin:0 0 10px 0;\"\u003e \u003cspan style=\"font-size:16px;\"\u003e\u003cstrong\u003eA:\u003c\/strong\u003e Yes. The 12:1 JE piston can run on pump gas or race gas depending on engine tuning, fuel quality, and riding conditions.\u003c\/span\u003e \u003c\/p\u003e \u003c\/li\u003e \u003cli\u003e \u003cspan style=\"font-size:16px;\"\u003e\u003cstrong\u003eQ:\u003c\/strong\u003e Is the piston forged or cast?\u003c\/span\u003e \u003cp style=\"text-align:left;margin:0 0 10px 0;\"\u003e \u003cspan style=\"font-size:16px;\"\u003e\u003cstrong\u003eA:\u003c\/strong\u003e This kit includes a genuine \u003cstrong\u003eJE forged racing piston\u003c\/strong\u003e designed for high-performance durability and increased strength.\u003c\/span\u003e \u003c\/p\u003e \u003c\/li\u003e \u003cli\u003e \u003cspan style=\"font-size:16px;\"\u003e\u003cstrong\u003eQ:\u003c\/strong\u003e Are all components brand new?\u003c\/span\u003e \u003cp style=\"text-align:left;margin:0 0 10px 0;\"\u003e \u003cspan style=\"font-size:16px;\"\u003e\u003cstrong\u003eA:\u003c\/strong\u003e Yes. Every component included in this kit is brand new in original packaging and covered by the manufacturer's warranty where applicable.\u003c\/span\u003e \u003c\/p\u003e \u003c\/li\u003e \u003c\/ul\u003e \u003ch3 style=\"color:#c00;margin:20px 0 6px;text-align:center;\"\u003e🌟 Why Buy from BPRATV\u003c\/h3\u003e \u003cp style=\"color: rgb(34, 34, 34); text-align: center;\"\u003e \u003cspan style=\"font-size:16px;\"\u003e At \u003cstrong\u003eBPRATV\u003c\/strong\u003e, our promise is unwavering: \u003cstrong\u003eThe Best Parts. The Best Performance. The Best Price.\u003c\/strong\u003e We specialize in high-performance powersports components trusted by riders and builders who demand reliability and results. Every part is carefully selected for precision, durability, and real-world performance. Trust BPRATV to keep your \u003cstrong\u003eHonda TRX400EX, TRX400X, and XR400R\u003c\/strong\u003e running at its best, \u003cstrong\u003eevery single time.\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e \u003cp style=\"text-align:center;margin:0 20px;\"\u003e \u003cspan style=\"color:#38761d;font-size:16px;\"\u003e \u003cstrong\u003e\u003cem\u003eUpgrade your Honda 400 engine with JE forged high-compression performance — order your complete rebuild kit today!\u003c\/em\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align:center;margin:0 20px;\"\u003e\u003cspan style=\"color:#38761d;font-size:16px;\"\u003e\u003cstrong\u003e\u003cem\u003e\u003cbr\u003e\u003c\/em\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e \u003cp style=\"text-align:center;\"\u003e \u003cspan style=\"color:#0000ff;font-size:16px;\"\u003e \u003cstrong\u003eBPRATV - The Best Parts. The Best Performance. The Best Price.\u003c\/strong\u003e \u003c\/span\u003e \u003c\/p\u003e \u003cp style=\"text-align:center;\"\u003e \u003cspan style=\"color:#0000ff;font-size:16px;\"\u003e \u003cstrong\u003eBRAPPPPPPPPPP!\u003c\/strong\u003e \u003c\/span\u003e \u003c\/p\u003e \u003cp style=\"text-align:center;font-size:10px;color:#555;margin:20px 0 0px;\"\u003e© BPRATV LLC\u003cbr\u003e\u003cbr\u003e Due to the nature of high performance and racing applications, BPRATV LLC components are sold without express warranty or any implied warranty of merchantability or fitness for a specific purpose. BPRATV LLC shall not, under any circumstances, be liable for any specific, incidental or consequential damages, including, but not limited to, damage, or loss of property or equipment, loss of profits or revenue(s), cost of purchased or replacement goods, or claims of customers of the purpose, which may arise and\/or shall result from sale, installation or use of these parts. Installation of these parts may void vehicle manufacturers warranty coverage and\/or may cause the vehicle to be illegal in some locations.\u003cbr\u003e\u003cbr\u003e This product is exempt from the emission standards and related requirements of 40 C.F.R. §1051 as provided by 40 C.F.R. §1051.620, and California law. This product is sold only for use in connection with EPA-certified, purpose-built, nonroad vehicles used solely for closed-course, nonroad competition\/racing.\u003c\/p\u003e \u003c\/div\u003e \u003c!-- 10 eBay Titles Honda TRX400EX TRX400X XR400R 12:1 JE Piston Cylinder Top End Rebuild Kit 1999-2014 Honda TRX400EX 12:1 JE Piston Cylinder Top End Rebuild Kit Honda XR400R TRX400EX TRX400X JE Forged Piston Cylinder Rebuild Kit Honda 400EX 400X XR400R Top End Rebuild Kit JE 12:1 High Compression TRX400EX XR400R TRX400X Cylinder Rebuild Kit JE Forged Piston 12:1 Honda TRX400EX Cylinder Top End Rebuild Kit JE Racing Forged Piston Honda XR400R 85mm Cylinder JE Forged Piston Top End Rebuild Kit TRX400X 400EX XR400R JE 12:1 High Compression Rebuild Kit Cylinder Honda 400EX 400X XR400R Stock Bore Cylinder JE Piston Rebuild Kit Honda TRX400EX XR400R Complete Top End Kit JE Piston Cometic Gaskets 10 eBay Keywords trx400ex rebuild kit trx400x top end rebuild xr400r piston kit honda 400ex cylinder kit je forged piston trx400ex trx400ex top end kit xr400r rebuild kit 400ex high compression piston trx400ex cylinder rebuild honda 400ex piston kit 10 SEO Keywords honda trx400ex top end rebuild kit trx400x je forged piston kit xr400r high compression rebuild kit honda 400ex cylinder piston rebuild trx400ex stock bore rebuild kit honda xr400r top end kit trx400ex 12 to 1 piston kit 400ex forged piston cylinder kit trx400x cylinder rebuild package honda 400ex cometic gasket kit 10 Meta Titles Honda TRX400EX 12:1 JE Piston Cylinder Top End Rebuild Kit TRX400X XR400R JE Forged Piston Top End Rebuild Kit Honda 400EX Cylinder Rebuild Kit JE 12:1 High Compression Honda XR400R Top End Rebuild Kit JE Forged Racing Piston TRX400EX TRX400X Cylinder Piston Rebuild Kit Complete Honda 400EX Stock Bore Cylinder JE Piston Rebuild Package XR400R 85mm Cylinder Top End Kit JE Forged Piston Honda TRX400EX Complete Top End Rebuild Kit Cometic Gaskets TRX400X High Compression JE Piston Cylinder Rebuild Kit Honda 400EX XR400R Performance Top End Rebuild Kit 10 Meta Descriptions Complete Honda TRX400EX top end rebuild kit with JE forged 12:1 piston, stock bore cylinder, Cometic MLS gaskets, and premium performance parts. Upgrade your Honda TRX400X or XR400R with a JE forged high compression piston and complete cylinder rebuild kit for stronger performance. Honda 400EX rebuild kit including 85mm cylinder, 12:1 JE forged piston, rings, pin, clips, and Cometic MLS top end gasket set. Restore power and reliability with this Honda XR400R and TRX400EX complete top end rebuild kit featuring JE racing piston technology. Performance Honda 400EX cylinder rebuild package with forged JE piston and Cometic MLS head gasket for aggressive riding applications. Honda TRX400EX stock bore rebuild kit with 12:1 forged piston designed for improved throttle response and dependable engine performance. Complete TRX400X top end rebuild kit with aftermarket cylinder, JE forged piston, and Cometic gasket kit for OEM-compatible installation. High compression Honda XR400R rebuild kit engineered with forged piston durability and premium sealing performance for long-lasting reliability. Honda 400EX top end rebuild kit featuring JE forged racing piston and MLS head gasket for improved torque and power delivery. TRX400EX XR400R TRX400X complete cylinder rebuild kit with forged piston components for high-performance trail and racing applications. SEO URL Handles honda-trx400ex-top-end-rebuild-kit-je-12-1-piston trx400x-xr400r-cylinder-rebuild-kit-forged-je-piston honda-400ex-stock-bore-cylinder-piston-rebuild-kit trx400ex-high-compression-top-end-rebuild-kit xr400r-je-forged-piston-cylinder-rebuild-package --\u003e","brand":"JE Pistons","offers":[{"title":"Default Title","offer_id":46196607189189,"sku":"3P-400\/379166\/C7825\/JT\/287321027909","price":388.88,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0593\/1083\/3861\/files\/je-pistons-honda-400ex-cometic-4_066c4830-eb3f-4340-a8b3-89ea7a92447a.png?v=1778299262","url":"https:\/\/bpratv.com\/products\/je-forged-12-1-piston-rebuild-kit-honda-trx400ex-xr400r","provider":"BPRATV","version":"1.0","type":"link"}