Honda 400EX / XR400R Complete Head Rebuild Kit – All Years

🔧 Complete Cylinder Head Rebuild Kit – Honda 400EX / 400X / XR400R
Fits All Years – The Most Complete Kit Available Online

This all-in-one cylinder head rebuild kit includes everything needed to restore your Honda 400EX, 400X, or XR400R’s top end. Perfect for stock or ported heads, this kit saves time, adds reliability, and ensures long-lasting performance.

✅ Fits all 1999–2014 Honda TRX400EX / TRX400X models
✅ Fits all 1996–2004 Honda XR400R models
✅ Works with stock or modified heads — no machining required
✅ Backed by a 1-year warranty

📦 What’s Included:

• ✔️ Steel Intake and Exhaust Valves

• ✔️ Inner & Outer Valve Springs

• ✔️ Valve Spring Retainers

• ✔️ Valve Spring Base Washers / Seats

• ✔️ Rocker Arms (L + R)

• ✔️ Rocker Arm Shafts

• ✔️ Rocker Arm Wave Washers (x2)

• ✔️ Rocker Arm Circlips and Springs

• ✔️ Viton Valve Stem Seals

⚙️ Key Features & Benefits:

• Complete Engine Top End Refresh: All the parts you need for a proper head rebuild in one package

• Durable Steel Valves: Stronger and more reliable than OEM

• Performance Valve Springs: For smooth, precise valve timing

• Rocker Assembly Hardware: Designed for long-term durability under high load

• Viton Valve Stem Seals: Oil control and high-temperature resistance

• Works with Any Head: OEM or ported, this kit bolts right in

🛠️ Why Choose This Kit?

• 🔧 Truly Complete: No piecing parts together — this kit covers it all

• 🧰 Stock or Big Bore Ready: Supports standard and performance builds

• 🛡️ 1-Year Warranty: Covers all manufacturer defects — install by a pro for best results

• 💸 High Value: Premium components at a price far below OEM dealership pricing

✅ Compatibility:

• 1999–2014 Honda TRX400EX / TRX400X (Sportrax 400)

• 1996–2004 Honda XR400R (Off-Road)

📦 Shipping Time:
Ships within 1–3 business days. Tracking provided once fulfilled.

💬 Customer Support:
Available Monday–Friday, 7 AM to 4 PM PST
Store chat open 24/7