TRX400EX 85mm Top End Kit WSM

🔧 Honda TRX400EX 85mm Top End Rebuild Kit – Dune Goons | Most Affordable New Cylinder Kit

Looking to rebuild your 400EX top end without spending a fortune? 🛠️ This Dune Goons 85mm Top End Kit is the most affordable complete rebuild option with a brand-new USA-made cylinder. Whether you're chasing reliability or performance, this kit delivers everything you need to get back on the trail fast — without cutting corners.

✅ What’s Included

• Dune Goons 85mm Cylinder – Precision-machined

• WSM Piston Kit (0903-1351 / 54-228-10) - 10:1 pump gas piston

  • Forged piston, rings, pin, and clips

• WSM Complete Gasket Kit

  • Head, base, intake, exhaust, and oil seals

• Bonus - WSM Oil filter included.
  

📦 Fitment

• 1999–2008 Honda TRX400EX

• 2012–2014 Honda TRX400X

• Also fits earlier models with 85mm standard bore setup

🛡️ Warranty Info

All Dune Goons cylinders are hand-inspected and backed by a 6-month limited warranty against manufacturing defects. WSM piston and gasket components are covered under their original manufacturer’s terms.