Honda TRX400EX / TRX400X / XR400R Complete Head Rebuild Kit – Stage 3 Hotcam

Full top-end refresh with serious performance gains.
This complete head rebuild kit fits all years and models of Honda TRX400EX, TRX400X, and XR400R, and includes everything needed to overhaul your cylinder head with upgraded valvetrain components and a Stage 3 Hotcam for maximum power. Works with stock or ported heads and big bore or OEM cylinders — though the Stage 3 cam performs best in built motors.

Everything is brand new in original packaging, and includes Kibblewhite valves and springs, cam bearings, rocker assemblies, and a full top-end gasket kit. Perfect for racers or performance builders looking to unlock big gains in throttle response, midrange, and top-end power.

✅ What’s Included:

• Stage 3 Hotcam

• Cam Bearings

• Rocker Arms

• Rocker Arm Shafts

• Kibblewhite Valve Spring Kit

• Kibblewhite Stainless Intake & Exhaust Valves

• Valve Keepers

• Valve Stem Seals

• Cam Chain

• Top End Gasket Kit

🔧 Compatible with stock or ported cylinder heads and stock or big bore cylinders.

🔧 Fitment:

Fits All Years/Models of:

• Honda TRX400EX (1999–2008)

• Honda TRX400X (2009, 2012–2014)

• Honda XR400R (All Years)

🛡️ Warranty & Installation Notes:

This kit is covered under the original manufacturer’s warranty.
We strongly recommend installation by a qualified mechanic experienced with performance Honda 4-stroke engines.

⚠️ Warranty Disclaimer:

• Improper installation, incorrect ring gap, tuning issues, or failure to follow instructions voids warranty

• No warranty decisions made from photos or phone calls

• Warranty claims require the defective part(s) to be returned for inspection