Kibblewhite Top End Kit for the 2000–2024 Suzuki DR-Z400

Restore and reinforce your DR-Z400 with the Kibblewhite Top End Service Kit. This isn't just a standard rebuild—it is a performance and reliability upgrade designed to eliminate the common failures associated with the factory Suzuki valve train.

The centerpiece of this kit is the Black Diamond™ Stainless Steel Valves, which provide more than twice the service life of original equipment. Paired with a precision-machined 2618 alloy piston and a racing-grade dual valve spring kit, this system is engineered to thrive under the high-RPM stress of off-road and supermoto riding.

Features:

• Black Diamond™ Valves: Precision-machined stainless steel valves with a specialized treatment that increases durability and heat resistance far beyond OEM titanium parts.
• Lightweight Dual Valve Springs: Includes high-tensile chrome silicone springs that allow the engine to rev higher safely. They are compatible with high-lift performance camshafts (up to .440" lift).
• Titanium Spring Retainers: Reduces moving mass in the cylinder head, improving throttle response and high-RPM stability.
• CNC Machined 2618 Piston: A lightweight, skirt-coated piston that maintains your stock compression ratio while offering superior strength and heat dissipation.
• Complete System Integrity: Every component (valves, springs, and piston) is designed to work as a matched system for optimized airflow and reliability.
• Pro-Grade Gaskets: Includes a premium Cometic top-end gasket kit for a leak-free seal.

Fitment:

• 2000–2024 – Suzuki DR-Z400

• 2000–2024 – Suzuki DR-Z400SM

In The Box:

• 1  -  2618 Aluminum Alloy Piston (with rings, wrist pin, and circlips)
• 2  -  Intake Valves & (2) Exhaust Valves (Stainless Steel)
• 1  -  Lightweight Dual Spring Kit (with Titanium retainers and steel base washers)
• 4  -  Viton® Valve Stem Seals
• 1  -  Cometic Top End Gasket Kit (Head, base, exhaust, and tensioner gaskets)

When installing the Kibblewhite Top End Service Kit (60-61850), you should adhere to the factory Suzuki DR-Z400 valve clearance (lash) specifications. Even with the upgrade to stainless steel valves and heavy-duty springs, these OEM tolerances remain the industry standard for a reliable rebuild.

Suzuki DR-Z400 Valve Lash Specifications:

Clearances must be measured when the engine is completely cold and the piston is at Top Dead Center (TDC) on the compression stroke.