HOT CAMS Hot Cams 8400009-2 Intake Valve Steel 2003-2008 Arctic Cat & Kawasaki KFX 400 8400009-2

Precision Engineered Performance for Your Top End

Worn valves are the leading cause of hard starting and lost horsepower in high-performance 4-stroke engines. The Hot Cams 8400009-2 Replacement Intake Valve, available at Moto-House MX, is a premium forged one-piece solution designed to restore your engine's factory performance. Engineered to meet or exceed OEM specifications, this valve provides a durable and reliable seal, ensuring your 400cc powerplant maintains maximum compression and efficiency on every ride.

Every Hot Cams valve is built for longevity and extreme racing conditions. This intake valve features a high-tech nitride coating and a precision-polished surface to reduce friction and carbon buildup. The valve stem tip is induction-hardened for superior wear resistance against the rocker or shim, while the valve head and seat surfaces are precision-machined to a 45° angle for an airtight fit. Fully compatible with your OEM valve keepers and retainers, this valve is the ultimate choice for a high-quality top-end rebuild.

Top Features: Hot Cams 8400009-2 Intake Valve

• Nitride Coated Steel: Provides a hard, low-friction surface that resists heat and extends the life of the valve guide and seat.
• Forged One-Piece Design: Superior structural integrity compared to multi-piece valves, preventing head separation under high stress.
• Induction Hardened Tip: The stem tip is hardened to resist mushrooming and wear from constant valve train impact.
• Precision Machined 45° Seat: Ensures a perfect seal against the cylinder head for optimal combustion and power.
• OEM Compatibility: Designed to work seamlessly with factory retainers, keepers, and springs for a hassle-free installation.

Expert Pro-Tip

When installing new valves, always lap the valve to the seat using a fine-grit grinding compound to ensure a perfectly airtight seal before final assembly.

Fitment List

Year Range	Vehicle Brand	Vehicle Model & Size
2000-2024	Suzuki	DR-Z400 / S / SM / E
2003-2014	Suzuki	LT-Z400 QuadSport Z
2003-2006	Kawasaki	KFX400 / KLX400 / R / SR
2004-2008	Arctic Cat	DVX 400 / TS

Frequently Asked Questions

Q: Is this an intake or exhaust valve?
A: This specific part number (8400009-2) is for the intake side of the cylinder head.

Q: Do I need to replace my valve springs when I install this?
A: While not always mandatory, we highly recommend inspecting your springs for sagging and replacing them if they are out of service spec to ensure proper valve closing at high RPM.

Q: Can I use my stock valve keepers with this valve?
A: Yes, these valves are designed to be fully compatible with OEM keepers and retainers.

Closing CTA: Get your engine back to peak performance. Buy the Hot Cams 8400009-2 Intake Valve now at Moto-House MX.

Stop by our local store in Montverde, FL or lightning-fast shipping across the USA.

Moto-House MX – Choice of Champions – is located in Clermont/Montverde, FL. The Best Motocross/UTV & ATV Shop in Central Florida.