TRX400EX / TRX400X 89mm Big Bore Top End Kit – Wiseco Piston

SKU 255051901468 🔥 Honda TRX400EX / TRX400X 89mm Big Bore Top End Kit – Wiseco Piston | Fits All YearsBolt-On Upgrade with Cylinder, Gasket Kit, Studs & Timing Chain ✅ What’s Included: Brand new 89mm big bore cylinder Wiseco forged piston – performance and reliability High-temp piston rings Chrome wristpin Circlips Heavy-duty head stud kit Complete top end gasket kit Timing chain ⚙️ Key Features & Benefits: 🏁 Bolt-On Power Upgrade: No machining required – install and go! 💥 Wiseco Forged Piston: High-performance forged design built for power and longevity 🛠️ Stud Kit Included: Prevents head lifting and improves overall durability 🔥 High-Temp Rings: Better sealing and less blow-by at high RPMs ⛽ Pump or Race Gas Compatible – run what you’ve got 📦 Everything Included: All new parts, sealed in original packaging ✅ 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 & Warranty Info:This is NOT a DIY kit for beginners. A professional mechanic should install and properly gap rings, verify tolerances, and break in the engine correctly.Improper installation is the #1 cause of failure. Warranty covers defects only after inspection – no exceptions.