{"product_id":"honda-trx400ex-440-big-bore-complete-engine-rebuild-kit","title":"1999-2004 Honda TRX 400EX 440 Big Bore Complete Rebuild Kit Stage 3 Hot Cams Cam","description":"\u003cp style=\"text-align: center;\"\u003e\u003cspan style=\"font-size: 0.000000px; color: transparent;\"\u003eComplete Honda TRX400EX 440 big bore engine rebuild kit with forged piston, Hot Rods crankshaft, Stage 3 Hotcam, clutch kit, bearings, seals and gaskets. \u003c\/span\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\u003e1999-2004 Honda TRX400EX 440 Big Bore Complete Engine Rebuild Kit Stage 3 Hotcam\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 Upgrade and completely rebuild your \u003cstrong\u003eHonda TRX400EX Sportrax\u003c\/strong\u003e engine with this massive \u003cstrong\u003e440cc big bore complete rebuild kit\u003c\/strong\u003e featuring a high-performance \u003cstrong\u003e89mm cylinder and forged piston assembly\u003c\/strong\u003e. Designed for riders demanding stronger acceleration, harder mid-range pull, and improved overall engine reliability, this premium package combines top-end and bottom-end components into one complete performance solution. \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 This complete rebuild kit includes a heavy-duty \u003cstrong\u003eHot Rods or Wiseco crankshaft\u003c\/strong\u003e, \u003cstrong\u003eStage 3 Hot Cams camshaft\u003c\/strong\u003e, upgraded clutch kit, complete bearings, seals, gaskets, and a premium \u003cstrong\u003eMAXLOCK head stud kit\u003c\/strong\u003e for maximum durability under aggressive riding conditions. Whether you are restoring a worn-out engine or building a powerful dune, trail, or race-ready TRX400EX, this kit delivers the performance and reliability serious riders expect. \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 Built for maximum performance and long-term reliability, this complete engine rebuild package upgrades nearly every critical internal component of the legendary Honda 400EX platform. \u003c\/span\u003e \u003c\/p\u003e \u003cul\u003e \u003cli\u003e\u003cspan style=\"font-size:16px;\"\u003e\u003cstrong\u003e89mm big bore cylinder\u003c\/strong\u003e increases displacement to approximately 440cc for major power gains\u003c\/span\u003e\u003c\/li\u003e \u003cli\u003e\u003cspan style=\"font-size:16px;\"\u003e\u003cstrong\u003eWiseco, Wossner, CP, or JE forged piston\u003c\/strong\u003e delivers superior strength and performance\u003c\/span\u003e\u003c\/li\u003e \u003cli\u003e\u003cspan style=\"font-size:16px;\"\u003e\u003cstrong\u003eStage 3 Hot Cams camshaft\u003c\/strong\u003e improves throttle response, top-end horsepower, and acceleration\u003c\/span\u003e\u003c\/li\u003e \u003cli\u003e\u003cspan style=\"font-size:16px;\"\u003e\u003cstrong\u003eHot Rods or Wiseco heavy-duty crankshaft assembly\u003c\/strong\u003e strengthens the bottom end for demanding riding conditions\u003c\/span\u003e\u003c\/li\u003e \u003cli\u003e\u003cspan style=\"font-size:16px;\"\u003e\u003cstrong\u003eMAXLOCK head stud kit\u003c\/strong\u003e provides superior clamping force with lifetime warranty coverage\u003c\/span\u003e\u003c\/li\u003e \u003cli\u003e\u003cspan style=\"font-size:16px;\"\u003e\u003cstrong\u003eComplete bearing, gasket, and seal kits\u003c\/strong\u003e included for full engine rebuild convenience\u003c\/span\u003e\u003c\/li\u003e \u003cli\u003e\u003cspan style=\"font-size:16px;\"\u003e\u003cstrong\u003eHeavy-duty clutch kit\u003c\/strong\u003e handles increased horsepower and torque output\u003c\/span\u003e\u003c\/li\u003e \u003cli\u003e\u003cspan style=\"font-size:16px;\"\u003e\u003cstrong\u003eCometic MLS head gasket\u003c\/strong\u003e delivers superior sealing under high compression applications\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;\"\u003e89mm aftermarket big bore cylinder\u003c\/span\u003e\u003c\/li\u003e \u003cli\u003e\u003cspan style=\"font-size:16px;\"\u003eWiseco, Wossner, CP, or JE forged 89mm piston\u003c\/span\u003e\u003c\/li\u003e \u003cli\u003e\u003cspan style=\"font-size:16px;\"\u003eNitrite coated piston rings\u003c\/span\u003e\u003c\/li\u003e \u003cli\u003e\u003cspan style=\"font-size:16px;\"\u003eChrome wrist 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;\"\u003eHot Rods or Wiseco heavy-duty crankshaft with connecting rod\u003c\/span\u003e\u003c\/li\u003e \u003cli\u003e\u003cspan style=\"font-size:16px;\"\u003eStage 3 Hot Cams camshaft\u003c\/span\u003e\u003c\/li\u003e \u003cli\u003e\u003cspan style=\"font-size:16px;\"\u003eMain crankshaft bearings\u003c\/span\u003e\u003c\/li\u003e \u003cli\u003e\u003cspan style=\"font-size:16px;\"\u003eCamshaft bearings\u003c\/span\u003e\u003c\/li\u003e \u003cli\u003e\u003cspan style=\"font-size:16px;\"\u003eTransmission bearings\u003c\/span\u003e\u003c\/li\u003e \u003cli\u003e\u003cspan style=\"font-size:16px;\"\u003eMAXLOCK head stud kit with lifetime warranty\u003c\/span\u003e\u003c\/li\u003e \u003cli\u003e\u003cspan style=\"font-size:16px;\"\u003eComplete engine gasket kit\u003c\/span\u003e\u003c\/li\u003e \u003cli\u003e\u003cspan style=\"font-size:16px;\"\u003eCometic MLS head gasket\u003c\/span\u003e\u003c\/li\u003e \u003cli\u003e\u003cspan style=\"font-size:16px;\"\u003eComplete engine seal kit\u003c\/span\u003e\u003c\/li\u003e \u003cli\u003e\u003cspan style=\"font-size:16px;\"\u003eValve stem seals\u003c\/span\u003e\u003c\/li\u003e \u003cli\u003e\u003cspan style=\"font-size:16px;\"\u003eHeavy-duty cam chain\u003c\/span\u003e\u003c\/li\u003e \u003cli\u003e\u003cspan style=\"font-size:16px;\"\u003eComplete clutch kit\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 440 big bore rebuild kit is designed specifically for the Honda TRX400EX Sportrax platform. \u003c\/span\u003e \u003c\/p\u003e \u003cul\u003e \u003cli\u003e\u003cspan style=\"font-size:16px;\"\u003eHonda TRX400EX Sportrax 1999\u003c\/span\u003e\u003c\/li\u003e \u003cli\u003e\u003cspan style=\"font-size:16px;\"\u003eHonda TRX400EX Sportrax 2000\u003c\/span\u003e\u003c\/li\u003e \u003cli\u003e\u003cspan style=\"font-size:16px;\"\u003eHonda TRX400EX Sportrax 2001\u003c\/span\u003e\u003c\/li\u003e \u003cli\u003e\u003cspan style=\"font-size:16px;\"\u003eHonda TRX400EX Sportrax 2002\u003c\/span\u003e\u003c\/li\u003e \u003cli\u003e\u003cspan style=\"font-size:16px;\"\u003eHonda TRX400EX Sportrax 2003\u003c\/span\u003e\u003c\/li\u003e \u003cli\u003e\u003cspan style=\"font-size:16px;\"\u003eHonda TRX400EX Sportrax 2004\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 What displacement does this kit increase the engine to?\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 The included 89mm big bore cylinder and piston increase engine displacement to approximately 440cc for substantial horsepower and torque gains.\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 both top-end and bottom-end rebuild parts?\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 is a complete engine rebuild kit including cylinder, piston, crankshaft, bearings, seals, gaskets, clutch kit, camshaft, and supporting hardware.\u003c\/span\u003e \u003c\/p\u003e \u003c\/li\u003e \u003cli\u003e \u003cspan style=\"font-size:16px;\"\u003e\u003cstrong\u003eQ:\u003c\/strong\u003e What brands are used for the piston and crankshaft?\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 Depending on availability, the forged piston may be supplied by Wiseco, Wossner, CP, or JE, while the crankshaft may be supplied by Hot Rods or Wiseco.\u003c\/span\u003e \u003c\/p\u003e \u003c\/li\u003e \u003cli\u003e \u003cspan style=\"font-size:16px;\"\u003e\u003cstrong\u003eQ:\u003c\/strong\u003e Is the Stage 3 Hot Cam included?\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. A genuine Stage 3 Hot Cams camshaft is included to maximize performance throughout the RPM range.\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 rebuild kit is brand new aftermarket performance equipment and includes warranty coverage.\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 Sportrax\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\u003eBuild your ultimate TRX400EX 440 big bore engine today with this complete Stage 3 performance rebuild kit!\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 1999-2004 Honda TRX400EX 440 Big Bore Complete Rebuild Kit Stage 3 Hotcam 99-04 TRX400EX 440 Big Bore Engine Rebuild Kit Hot Rods Crank Hotcam Honda TRX400EX 440 Big Bore Rebuild Kit Stage 3 Cam Wiseco Crankshaft TRX400EX Complete 440 Engine Rebuild Kit Hotcam Clutch Crank Bearings 1999-2004 TRX400EX 89mm Big Bore Rebuild Kit Complete Stage 3 Hotcam Honda 400EX 440 Big Bore Motor Rebuild Kit Forged Piston Hot Rods Crank TRX400EX Sportrax 440 Big Bore Complete Engine Kit Stage 3 Hotcams 99-04 Honda TRX400EX Complete 440 Rebuild Kit Wiseco Crank Clutch Kit Honda TRX400EX 89mm 440 Big Bore Engine Kit Hotcams Complete Rebuild TRX400EX Stage 3 Hotcam 440 Big Bore Complete Motor Rebuild Kit 99-04 10 eBay Keywords trx400ex rebuild kit trx400ex 440 big bore 400ex engine rebuild trx400ex hotcam kit trx400ex crankshaft kit 400ex big bore kit trx400ex complete rebuild honda 400ex piston kit trx400ex clutch kit 440 big bore trx400ex 10 SEO Keywords honda trx400ex 440 big bore rebuild kit trx400ex complete engine rebuild kit 400ex stage 3 hotcam rebuild trx400ex forged piston crank kit trx400ex 89mm big bore cylinder honda 400ex complete motor rebuild trx400ex clutch crankshaft rebuild kit trx400ex performance engine build 400ex hot rods crank rebuild trx400ex complete 440 engine kit 10 Meta Titles Honda TRX400EX 440 Big Bore Complete Engine Rebuild Kit Stage 3 Hotcam 1999-2004 TRX400EX 89mm Big Bore Rebuild Kit Hot Rods Crankshaft TRX400EX Complete 440 Engine Rebuild Kit Wiseco Piston Hotcam Honda 400EX 440 Big Bore Motor Rebuild Kit Complete Performance Kit TRX400EX Stage 3 Hotcam 440 Big Bore Engine Rebuild Kit 1999-2004 Honda TRX400EX Complete 440 Rebuild Kit Crankshaft Clutch Bearings 99-04 TRX400EX Big Bore Engine Rebuild Kit Forged Piston Hotcam TRX400EX 89mm 440 Big Bore Motor Kit Complete Bottom Top End Rebuild Honda 400EX Complete Engine Rebuild Kit 440 Big Bore Performance Parts TRX400EX 440 Big Bore Kit Hot Rods Crank Stage 3 Camshaft Complete 10 Meta Descriptions Complete Honda TRX400EX 440 big bore engine rebuild kit with forged piston, Hot Rods crankshaft, Stage 3 Hotcam, clutch kit, bearings, seals and gaskets. Upgrade your 1999-2004 Honda TRX400EX with a complete 440 big bore rebuild kit featuring Stage 3 Hotcams, forged piston and heavy-duty crankshaft. Full TRX400EX engine rebuild kit including 89mm big bore cylinder, forged piston, crankshaft, clutch kit, bearings, seals and complete gaskets. Honda 400EX 440 complete engine rebuild package with Stage 3 Hotcam, Hot Rods crankshaft, clutch kit and Cometic MLS head gasket included. TRX400EX 89mm big bore rebuild kit designed for high-performance ATV builds with forged piston, heavy-duty crankshaft and complete seals and bearings. Rebuild your Honda TRX400EX engine with this complete 440 big bore performance kit including Hotcam, clutch kit, crankshaft and full gasket set. Complete 440cc big bore rebuild solution for Honda TRX400EX models with forged piston, transmission bearings, seals and upgraded clutch components. Honda TRX400EX performance rebuild kit with 89mm cylinder, forged piston, Stage 3 Hotcam and complete top and bottom end rebuild components. High-performance TRX400EX engine rebuild kit with Wiseco or Hot Rods crankshaft, forged piston, clutch kit and complete gasket seal package. TRX400EX complete motor rebuild kit with 440 big bore cylinder, Hotcam, clutch kit, bearings, seals and heavy-duty crankshaft assembly. SEO URL Handles honda-trx400ex-440-big-bore-complete-engine-rebuild-kit trx400ex-89mm-big-bore-stage-3-hotcam-rebuild-kit honda-400ex-complete-440-motor-rebuild-performance-kit trx400ex-hot-rods-crank-big-bore-engine-rebuild-kit 1999-2004-trx400ex-440-big-bore-complete-engine-kit --\u003e","brand":"BPRATV","offers":[{"title":"Default Title","offer_id":46218527178949,"sku":"1051-3\/3P-440\/4794M08900\/C7826\/284841906561","price":1388.88,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0593\/1083\/3861\/files\/284841906561-0.jpg?v=1778723271","url":"https:\/\/bpratv.com\/products\/honda-trx400ex-440-big-bore-complete-engine-rebuild-kit","provider":"BPRATV","version":"1.0","type":"link"}