Wiseco 85.00 mm Standard Bore Top End Kit – Honda TRX400EX / TRX400X / XR400R

🛠️ Description
Refresh your Honda 400cc engine with the Wiseco 85.00 mm Standard Bore Top End Kit (10:1 compression). This complete package includes everything you need for a reliable top end rebuild, with forged piston technology proven in racing at the highest levels. Each kit is engineered for performance, durability, and easy installation, making it the perfect choice for trail riders and racers alike.

✅ What’s Included

• Forged 85.00 mm standard bore piston (10:1 compression)

• High-performance piston ring set

• Wrist pin & circlips

• Complete top-end gasket kit (head, base, valve cover, and seals)

📦 Fitment
Honda TRX400EX Sportrax

• 1999–2009

Honda TRX400X

• 2012–2014

Honda XR400R

• 1997–2004

🛡️ Warranty Info
Wiseco piston kits carry a limited manufacturer’s warranty against defects in materials and workmanship. Warranty excludes race damage, improper installation, or tuning issues.

🔑 Key Features

• Standard bore (85.00 mm) forged piston with 10:1 compression ratio

• Race-proven design trusted by professional motocross and GNCC teams

• Forged from aerospace alloy for superior strength-to-weight ratio

• Includes premium top-end gasket kit for a complete rebuild solution

• High-performance rings and alloy wrist pin included

• Built for durability, sustained power, and long service life