{"product_id":"honda-xr400r-89mm-big-bore-stage-3-hot-cams-kit","title":"XR400 XR 400R 89mm Big Bore Kit +4 Cylinder Hi Comp Top End Rebuild Stage 3 Cam","description":"\u003cp style=\"text-align: center;\"\u003e\u003cspan style=\"font-size: 0.000000px; color: transparent;\"\u003eUpgrade your Honda XR400R or TRX400EX with an 89mm big bore top end rebuild kit featuring a forged piston, Stage 3 Hot Cams camshaft and Cometic MLS gaskets.\n\u003c\/span\u003e\u003c\/p\u003e\u003cdiv style=\"max-width: 800px; margin: 0px auto; font-family: Arial, Helvetica, sans-serif; line-height: 1.5;\"\u003e\n\n\u003ch2 style=\"color: rgb(34, 34, 34); text-align: center; font-size: 26px; margin: 0px 0px 12px;\"\u003e\n\u003cstrong\u003eHonda XR400 XR400R 400EX 400X 89mm +4 Big Bore Cylinder Hi Compression Top End Rebuild Kit Stage 3 Hot Cams\u003c\/strong\u003e\n\u003c\/h2\u003e\n\n\u003ch3 style=\"color: rgb(204, 0, 0); margin: 20px 0px 6px; text-align: center;\"\u003e📖 Product Description\u003c\/h3\u003e\n\n\u003cp style=\"color: rgb(34, 34, 34); text-align: center; margin: 0px 20px;\"\u003e\n\u003cspan style=\"font-size:16px;\"\u003e\nTransform your Honda engine with this \u003cstrong\u003e89mm +4 Big Bore Top End Rebuild Kit\u003c\/strong\u003e featuring a brand-new aftermarket cylinder, a forged \u003cstrong\u003eWiseco or CP Carrillo high-compression piston\u003c\/strong\u003e, and a performance \u003cstrong\u003eStage 3 Hot Cams camshaft\u003c\/strong\u003e. Designed for riders looking to maximize horsepower, throttle response, and overall engine performance, this complete kit delivers everything needed for a premium top-end rebuild.\n\u003c\/span\u003e\n\u003c\/p\u003e\n\u003cp style=\"color: rgb(34, 34, 34); text-align: center; margin: 0px 20px;\"\u003e\u003cspan style=\"font-size:16px;\"\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/p\u003e\n\n\u003cp style=\"color: rgb(34, 34, 34); text-align: center; margin: 0px 20px;\"\u003e\n\u003cspan style=\"font-size:16px;\"\u003e\nEngineered to fit all Honda \u003cstrong\u003eXR400R, TRX400EX, and TRX400X\u003c\/strong\u003e models and years with \u003cstrong\u003eno modifications required\u003c\/strong\u003e, this package combines race-proven components from industry-leading manufacturers for outstanding durability, reliability, and performance. The high-compression piston provides increased power while maintaining compatibility with pump or race gas.\n\u003c\/span\u003e\n\u003c\/p\u003e\n\n\u003ch3 style=\"color: rgb(204, 0, 0); margin: 20px 0px 6px; text-align: center;\"\u003e🔥 Key Features \u0026amp; Benefits\u003c\/h3\u003e\n\n\u003cul style=\"color: rgb(34, 34, 34);\"\u003e\n\u003cli\u003e\u003cspan style=\"font-size:16px;\"\u003e\u003cstrong\u003e89mm (+4mm) big bore cylinder\u003c\/strong\u003e increases displacement and horsepower.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"font-size:16px;\"\u003e\u003cstrong\u003eWiseco or CP Carrillo forged piston\u003c\/strong\u003e for superior strength and durability.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"font-size:16px;\"\u003e\u003cstrong\u003eHigh-compression piston\u003c\/strong\u003e delivers stronger torque and faster throttle response.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"font-size:16px;\"\u003e\u003cstrong\u003eStage 3 Hot Cams camshaft\u003c\/strong\u003e maximizes mid-range and top-end power.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"font-size:16px;\"\u003e\u003cstrong\u003eSKFOEM upgraded cam bearings\u003c\/strong\u003e improve reliability and camshaft support.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"font-size:16px;\"\u003e\u003cstrong\u003eCometic MLS head gasket\u003c\/strong\u003e provides exceptional sealing for high-performance applications.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"font-size:16px;\"\u003e\u003cstrong\u003eHeavy-duty timing chain\u003c\/strong\u003e ensures accurate valve timing and long service life.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"font-size:16px;\"\u003eDirect bolt-on installation with \u003cstrong\u003eno engine modifications required.\u003c\/strong\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"font-size:16px;\"\u003eCompatible with \u003cstrong\u003epump gas or race gas.\u003c\/strong\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3 style=\"color: rgb(204, 0, 0); margin: 20px 0px 6px; text-align: center;\"\u003e📦 Product Contents\u003c\/h3\u003e\n\n\u003cul style=\"color: rgb(34, 34, 34);\"\u003e\n\u003cli\u003e\u003cspan style=\"font-size:16px;\"\u003e89mm (+4mm) aftermarket big bore cylinder\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"font-size:16px;\"\u003eWiseco or CP Carrillo forged high-compression piston\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"font-size:16px;\"\u003eNitride-coated piston rings\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"font-size:16px;\"\u003eChrome wrist pin\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"font-size:16px;\"\u003ePiston circlips\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"font-size:16px;\"\u003eStage 3 Hot Cams camshaft\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"font-size:16px;\"\u003eSKF OEM upgraded camshaft bearings\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"font-size:16px;\"\u003eCylinder head studs\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"font-size:16px;\"\u003eCometic complete top end gasket kit\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"font-size:16px;\"\u003eCometic MLS head gasket\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"font-size:16px;\"\u003eHeavy-duty timing chain\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3 style=\"color: rgb(204, 0, 0); margin: 20px 0px 6px; text-align: center;\"\u003e✅ Compatibility\u003c\/h3\u003e\n\n\u003cp style=\"color: rgb(34, 34, 34); text-align: center; margin: 0px 20px;\"\u003e\n\u003cspan style=\"font-size:16px;\"\u003e\nDesigned as a direct-fit performance upgrade for the following Honda models:\n\u003c\/span\u003e\n\u003c\/p\u003e\n\n\u003cul style=\"color: rgb(34, 34, 34);\"\u003e\n\u003cli\u003e\u003cspan style=\"font-size:16px;\"\u003e\u003cstrong\u003eHonda XR400R\u003c\/strong\u003e - All Years\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"font-size:16px;\"\u003e\u003cstrong\u003eHonda TRX400EX\u003c\/strong\u003e - All Years\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"font-size:16px;\"\u003e\u003cstrong\u003eHonda TRX400X\u003c\/strong\u003e - All Years\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"font-size:16px;\"\u003eDirect bolt-on installation with no machining or modifications required.\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3 style=\"color: rgb(204, 0, 0); margin: 20px 0px 6px; text-align: center;\"\u003e❓ Frequently Asked Questions\u003c\/h3\u003e\n\n\u003cul style=\"color: rgb(34, 34, 34);\"\u003e\n\n\u003cli\u003e\n\u003cspan style=\"font-size:16px;\"\u003e\u003cstrong\u003eQ:\u003c\/strong\u003e Does this kit require machining or engine modifications?\u003c\/span\u003e\n\u003cp style=\"text-align:left;margin:0 0 10px 0;\"\u003e\n\u003cspan style=\"font-size:16px;\"\u003e\u003cstrong\u003eA:\u003c\/strong\u003e No. This kit is designed as a direct bolt-on upgrade for all compatible models with no additional modifications required.\u003c\/span\u003e\n\u003c\/p\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n\u003cspan style=\"font-size:16px;\"\u003e\u003cstrong\u003eQ:\u003c\/strong\u003e Which piston brand is included?\u003c\/span\u003e\n\u003cp style=\"text-align:left;margin:0 0 10px 0;\"\u003e\n\u003cspan style=\"font-size:16px;\"\u003e\u003cstrong\u003eA:\u003c\/strong\u003e The kit includes either a \u003cstrong\u003eWiseco\u003c\/strong\u003e or \u003cstrong\u003eCP Carrillo\u003c\/strong\u003e forged piston depending on current inventory. Both are premium performance pistons manufactured to the highest standards.\u003c\/span\u003e\n\u003c\/p\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n\u003cspan style=\"font-size:16px;\"\u003e\u003cstrong\u003eQ:\u003c\/strong\u003e Can I run pump gas?\u003c\/span\u003e\n\u003cp style=\"text-align:left;margin:0 0 10px 0;\"\u003e\n\u003cspan style=\"font-size:16px;\"\u003e\u003cstrong\u003eA:\u003c\/strong\u003e Yes. This combination is designed to operate on pump gas or race gas when properly tuned.\u003c\/span\u003e\n\u003c\/p\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n\u003cspan style=\"font-size:16px;\"\u003e\u003cstrong\u003eQ:\u003c\/strong\u003e What benefits does the Stage 3 Hot Cams camshaft provide?\u003c\/span\u003e\n\u003cp style=\"text-align:left;margin:0 0 10px 0;\"\u003e\n\u003cspan style=\"font-size:16px;\"\u003e\u003cstrong\u003eA:\u003c\/strong\u003e The Stage 3 camshaft significantly improves airflow, throttle response, mid-range power, and top-end horsepower for aggressive riding and racing applications.\u003c\/span\u003e\n\u003c\/p\u003e\n\u003c\/li\u003e\n\n\u003c\/ul\u003e\n\n\u003ch3 style=\"color: rgb(204, 0, 0); margin: 20px 0px 6px; text-align: center;\"\u003e🌟 Why Buy from BPRATV\u003c\/h3\u003e\n\n\u003cp style=\"color: rgb(34, 34, 34); text-align: center;\"\u003e\n\u003cspan style=\"font-size:16px;\"\u003e\nAt \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 XR400R, TRX400EX, or TRX400X\u003c\/strong\u003e running at its best, \u003cstrong\u003eevery single time.\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\n\u003cp style=\"color: rgb(34, 34, 34); text-align: center; margin: 0px 20px;\"\u003e\n\u003cspan style=\"color:#38761d;font-size:16px;\"\u003e\n\u003cstrong\u003e\u003cem\u003eBuild bigger power and legendary Honda reliability--order your 89mm Big Bore Stage 3 Top End Kit today!\u003c\/em\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\n\u003cp style=\"text-align: center;\"\u003e\n\n\u003cb style=\"color: rgb(0, 0, 255); font-size: 16px;\"\u003eBPRATV - The Best Parts. The Best Performance. The Best Price.\u003c\/b\u003e\u003cfont color=\"#222222\"\u003e\u003cbr\u003e\u003c\/font\u003e\u003cstrong style=\"color: rgb(0, 0, 255); font-size: 16px;\"\u003eBRAPPPPPPPPPP!\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp style=\"color: rgb(85, 85, 85); text-align: center; font-size: 10px; margin: 20px 0px 0px;\"\u003e© BPRATV LLC\u003cbr\u003e\u003cbr\u003e\nDue 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\nThis 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\n\n\u003c\/div\u003e\n\n\u003c!--\n\n10 eBay Titles\n\nHonda XR400R 89mm Big Bore Kit Stage 3 Hot Cams Hi Comp Top End Rebuild 400EX\nHonda TRX400EX XR400R 89mm Big Bore Cylinder Hi Comp Kit Stage 3 Hot Cams\n89mm Big Bore Top End Rebuild Kit Honda XR400R 400EX 400X Stage 3 Cam\nWiseco CP 89mm Big Bore Cylinder Kit Honda XR400R TRX400EX Stage 3 Cam\nHonda XR400R TRX400X 89mm Big Bore Hi Compression Rebuild Kit Hot Cams\nHonda 400EX XR400 Stage 3 Hot Cams 89mm Big Bore Top End Rebuild Kit\nHonda XR400R Performance 89mm Big Bore Cylinder Piston Camshaft Rebuild Kit\n89mm +4 Big Bore Honda XR400R TRX400EX Complete Top End Performance Kit\nHonda XR400R 400EX High Compression 89mm Big Bore Cylinder Stage 3 Cam Kit\nHonda XR400R TRX400EX Top End Rebuild Kit 89mm Big Bore Hot Cams Stage 3\n\n10 eBay Keywords\n\nxr400 big bore kit\nxr400 stage 3 cam\n400ex big bore kit\n89mm piston kit\nxr400 top end rebuild\ntrx400ex rebuild kit\nhot cams xr400\n89mm cylinder kit\nxr400 high compression\n400x performance kit\n\n10 SEO Keywords\n\nHonda XR400R 89mm big bore kit\nTRX400EX stage 3 cam kit\nHonda XR400 top end rebuild\n400EX forged piston kit\n89mm XR400 cylinder\nHonda XR400 performance rebuild\nXR400 Hot Cams Stage 3\nHonda 400EX high compression piston\nXR400 cylinder rebuild kit\nHonda XR400 racing engine kit\n\n10 Meta Titles\n\nHonda XR400R 89mm Big Bore Kit Stage 3 Hot Cams Top End Rebuild\nHonda TRX400EX 89mm Big Bore Cylinder High Compression Kit\nXR400R Performance Top End Kit with Stage 3 Hot Cams\nHonda 400EX Big Bore Rebuild Kit with Forged Piston\n89mm Big Bore Honda XR400R Complete Top End Kit\nHonda XR400 Stage 3 Cam Big Bore Cylinder Kit\nTRX400X 89mm High Compression Rebuild Kit\nHonda XR400R Performance Cylinder and Camshaft Kit\nHonda 400EX Top End Rebuild Stage 3 Performance Kit\nXR400R 89mm Big Bore Performance Upgrade Kit\n\n10 Meta Descriptions\n\nUpgrade your Honda XR400R or TRX400EX with an 89mm big bore top end rebuild kit featuring a forged piston, Stage 3 Hot Cams camshaft and Cometic MLS gaskets.\nComplete 89mm big bore rebuild kit for Honda XR400R, 400EX and 400X with forged high-compression piston, timing chain and premium top-end components.\nIncrease horsepower with this Honda XR400R 89mm big bore cylinder kit including Stage 3 Hot Cams, forged piston and Cometic MLS gasket set.\nPerformance Honda XR400R top end rebuild kit featuring 89mm cylinder, forged piston, upgraded bearings and Stage 3 camshaft for maximum power.\nHonda TRX400EX 89mm big bore engine rebuild kit with forged piston, Stage 3 cam, timing chain and premium sealing components for lasting reliability.\nPremium XR400R performance rebuild kit with high-compression forged piston, big bore cylinder and Stage 3 Hot Cams for superior throttle response.\nBuild more power in your Honda XR400R or TRX400X using this 89mm big bore top end rebuild package with premium performance components.\nComplete Honda 400EX performance top end rebuild kit with 89mm cylinder, forged piston, Cometic gasket kit and Stage 3 Hot Cams camshaft.\nRestore and upgrade your Honda XR400 engine with a direct-fit 89mm big bore kit built for reliable high-performance riding.\nHonda XR400R and TRX400EX performance engine rebuild featuring 89mm cylinder, forged piston, upgraded cam bearings and Stage 3 camshaft.\n\nSEO URL Handles\n\nhonda-xr400r-89mm-big-bore-stage-3-hot-cams-kit\nhonda-trx400ex-89mm-big-bore-top-end-rebuild-kit\nxr400r-high-compression-89mm-performance-kit\nhonda-400ex-big-bore-cylinder-stage3-cam-kit\nxr400r-trx400x-complete-89mm-top-end-kit\n\n--\u003e\u003cmeta name=\"keywords\" content=\"Honda XR400R 89mm big bore kit TRX400EX stage 3 cam kit Honda XR400 top end rebuild 400EX forged piston kit 89mm XR400 cylinder Honda XR400 performance rebuild XR400 Hot Cams Stage 3 Honda 400EX high compression piston XR400 cylinder rebuild kit Honda XR400 racing engine kit\"\u003e\u003cmeta name=\"description\" content=\"Upgrade your Honda XR400R or TRX400EX with an 89mm big bore top end rebuild kit featuring a forged piston, Stage 3 Hot Cams camshaft and Cometic MLS gaskets.\"\u003e","brand":"BPRATV","offers":[{"title":"Default Title","offer_id":46500215226565,"sku":"1051-3\/3P-440\/4794M08900*\/M2033\/257609396181","price":828.98,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0593\/1083\/3861\/files\/product-img-1051_3_3p_440_4794m08900__m2033_265620432489-0-30ff05b5-2a1a-4ad2-91e9-a8dbd35be530.png?v=1783387613","url":"https:\/\/bpratv.com\/products\/honda-xr400r-89mm-big-bore-stage-3-hot-cams-kit","provider":"BPRATV","version":"1.0","type":"link"}