TRX400EX TRX 400EX Big Bore Kit Stage 2 Hotcam 87mm +2 Cylinder Hotcams Camshaft
Upgrade your Honda TRX400EX or TRX400X with the BPRATV 87mm Big Bore Kit and Hotcams Stage 2 Camshaft. Includes forged piston, titanium studs, and full gasket set — race-ready reliability and unbeatable performance.
HONDA TRX400EX 87mm Big Bore Kit + Hotcams Stage 2 Camshaft Top End Rebuild
🔥 Key Features & Benefits
Unleash serious power gains and torque with this complete BPRATV 87mm Big Bore Kit and Hotcams Stage 2 Camshaft upgrade for your Honda TRX400EX or TRX400X. Designed for riders who demand premium performance, this setup delivers a perfect balance of reliability, compression, and horsepower — ready for both trail and track domination.
🚀 Complete Top End Rebuild Kit Includes
Everything you need for a full, worry-free rebuild. Precision-engineered, race-tested, and backed by the BPRATV performance guarantee — this kit is your one-stop solution for a flawless 400EX top end refresh.
- BPRATV 87mm Big Bore Cylinder – Includes 1-Year Warranty
- Forged Wiseco, CP, JE, or Wossner Piston Kit* (Pump Gas Compatible)
- High-temperature piston rings, chrome wristpin, and circlips
- Talon Titanium Cylinder Head Stud Kit – Lifetime Warranty
- Hot Cams Stage 2 Camshaft for superior mid-top end power
- Upgraded SKF OEM Camshaft Bearings (Both)
- Cometic Big Bore Top End Gasket Kit with MLS Head Gasket
- Viton valve stem seals and NGK spark plug
- BPRATV Heavy Duty Timing Chain – OEM Replacement
- 1-Year warranty on the entire kit for total peace of mind*
✅ Compatibility
This top-end performance package is 100% compatible with all years and versions of the Honda TRX400EX and TRX400X.
- Honda TRX400EX (All Years)
- Honda TRX400X (All Years)
- Direct bolt-on — no machining required
- Works with stock or modified bottom ends
- Perfect for trail, dune, or race applications
❓ Frequently Asked Questions (FAQ)
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Q: Does this kit require any case boring or machining?
A: No. This BPRATV Big Bore Kit is a direct bolt-on setup with no machining necessary.
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Q: What fuel should I use with this piston kit?
A: This forged piston is pump-gas compatible for reliable daily and race use.
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Q: What camshaft comes in the kit?
A: The kit includes a genuine Hotcams Stage 2 Camshaft — ideal for top-end horsepower.
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Q: Does the kit include all gaskets and seals?
A: Yes. Includes a complete Cometic Big Bore Gasket Set with MLS head gasket, Viton seals, and all necessary components.
🌟 Why Buy from BPRATV? Trusted Performance Experts 🌟
At BPRATV, our promise is unwavering: The Best Parts. The Best Performance. The Best Price. Whether you’re rebuilding, racing, or upgrading, our kits are proven to deliver reliability, power, and long-lasting performance. Trust BPRATV to keep your Honda TRX400EX or TRX400X running at its best, every single time.
Order your complete TRX400EX Big Bore Kit today and feel the BPRATV difference!
BPRATV - The Best Parts. The Best Performance. The Best Price.
BRAPPPPPPPPPP!
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