TRX400EX / TRX400X 87mm Big Bore Top End Kit – Forged Piston

SKU 255468268965

🔥 Honda TRX400EX / TRX400X 87mm Big Bore Top End Kit – Forged Piston | Fits All Years
Includes Cylinder, Gasket Kit, Studs & Timing Chain | Reliable Power Upgrade

✅ What’s Included:

• 87mm big bore aftermarket cylinder (brand new)

• Wiseco, JE, or CP forged piston (varies by stock – all premium brands)

• High-temp piston rings

• Chrome wristpin

• Circlips

• Heavy-duty head stud kit

• Top end gasket kit

• Timing chain

⚙️ Key Features & Benefits:

• 🏁 Power Boost: Increases displacement with an 87mm bore for more torque and top-end performance

• 🛠️ Forged Piston Strength: Premium forged piston from top brands for superior durability under high compression

• 🔩 Heavy-Duty Stud Kit: Withstands high cylinder pressure for improved long-term reliability

• 🧊 High-Temp Rings: Built for better sealing and less blow-by under heat

• ✅ Complete Kit: Everything you need to refresh or rebuild your top end – no guesswork

• 🧃 Runs on pump or race gas

• 💯 Works with stock or aftermarket bottom ends

📌 Compatibility – Fits All Years & Submodels:

Fits ALL Honda TRX400EX & TRX400X models including:

• 1999–2008 Honda Sportrax 400 TRX400EX 2x4

• 2009, 2012–2014 Honda TRX400X 2x4

📦 Installation Notes:
Professional installation is highly recommended. Tuning and break-in are required for best performance and longevity.