1999-2004 Honda TRX 400EX 440 Big Bore Complete Rebuild Kit Stage 3 Hot Cams Cam
Complete Honda TRX400EX 440 big bore engine rebuild kit with forged piston, Hot Rods crankshaft, Stage 3 Hotcam, clutch kit, bearings, seals and gaskets.
1999-2004 Honda TRX400EX 440 Big Bore Complete Engine Rebuild Kit Stage 3 Hotcam
📖 Product Description
Upgrade and completely rebuild your Honda TRX400EX Sportrax engine with this massive 440cc big bore complete rebuild kit featuring a high-performance 89mm cylinder and forged piston assembly. 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.
This complete rebuild kit includes a heavy-duty Hot Rods or Wiseco crankshaft, Stage 3 Hot Cams camshaft, upgraded clutch kit, complete bearings, seals, gaskets, and a premium MAXLOCK head stud kit 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.
🔥 Key Features & Benefits
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.
- 89mm big bore cylinder increases displacement to approximately 440cc for major power gains
- Wiseco, Wossner, CP, or JE forged piston delivers superior strength and performance
- Stage 3 Hot Cams camshaft improves throttle response, top-end horsepower, and acceleration
- Hot Rods or Wiseco heavy-duty crankshaft assembly strengthens the bottom end for demanding riding conditions
- MAXLOCK head stud kit provides superior clamping force with lifetime warranty coverage
- Complete bearing, gasket, and seal kits included for full engine rebuild convenience
- Heavy-duty clutch kit handles increased horsepower and torque output
- Cometic MLS head gasket delivers superior sealing under high compression applications
📦 Product Contents
- 89mm aftermarket big bore cylinder
- Wiseco, Wossner, CP, or JE forged 89mm piston
- Nitrite coated piston rings
- Chrome wrist pin
- Piston circlips
- Hot Rods or Wiseco heavy-duty crankshaft with connecting rod
- Stage 3 Hot Cams camshaft
- Main crankshaft bearings
- Camshaft bearings
- Transmission bearings
- MAXLOCK head stud kit with lifetime warranty
- Complete engine gasket kit
- Cometic MLS head gasket
- Complete engine seal kit
- Valve stem seals
- Heavy-duty cam chain
- Complete clutch kit
✅ Compatibility
This complete 440 big bore rebuild kit is designed specifically for the Honda TRX400EX Sportrax platform.
- Honda TRX400EX Sportrax 1999
- Honda TRX400EX Sportrax 2000
- Honda TRX400EX Sportrax 2001
- Honda TRX400EX Sportrax 2002
- Honda TRX400EX Sportrax 2003
- Honda TRX400EX Sportrax 2004
❓ FAQ
- Q: What displacement does this kit increase the engine to?
A: The included 89mm big bore cylinder and piston increase engine displacement to approximately 440cc for substantial horsepower and torque gains.
- Q: Does this kit include both top-end and bottom-end rebuild parts?
A: Yes. This is a complete engine rebuild kit including cylinder, piston, crankshaft, bearings, seals, gaskets, clutch kit, camshaft, and supporting hardware.
- Q: What brands are used for the piston and crankshaft?
A: 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.
- Q: Is the Stage 3 Hot Cam included?
A: Yes. A genuine Stage 3 Hot Cams camshaft is included to maximize performance throughout the RPM range.
- Q: Are all components brand new?
A: Yes. Every component included in this rebuild kit is brand new aftermarket performance equipment and includes warranty coverage.
🌟 Why Buy from BPRATV
At BPRATV, our promise is unwavering: The Best Parts. The Best Performance. The Best Price. 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 Honda TRX400EX Sportrax running at its best, every single time.
Build your ultimate TRX400EX 440 big bore engine today with this complete Stage 3 performance rebuild kit!
BPRATV - The Best Parts. The Best Performance. The Best Price.
BRAPPPPPPPPPP!
© BPRATV LLC
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.
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.
