Moose Racing Valve Seal Kit for Kawasaki KX450 and KX450F (M40-40790)

The Moose Offroad M40-40790 Valve Seal Kit is designed for Kawasaki KX450 and KX450F engines requiring reliable intake and exhaust valve sealing. The kit provides contact surfaces engineered to support improved sealing performance and helps maintain proper valve-train operation in demanding off-road applications. It is a practical replacement solution for restoring sealing integrity during engine service or cylinder head maintenance.
Manufactured with high-temperature Viton® and PTFE materials, these valve seals are built to withstand the heat and operating conditions associated with performance motorcycle engines. The seals offer improved tolerance over OEM components, helping provide a consistent fit and dependable service life when installed according to the manufacturer’s procedures. The materials are selected to support durability in environments exposed to elevated temperatures and repeated engine cycling.
Each Moose Offroad M40-40790 kit is 100% quality controlled and includes one complete set of intake and exhaust valve seals. This all-in-one configuration simplifies installation by supplying the seals needed for a full valve service rather than requiring separate purchases. Made in the USA, the kit is suited to riders, technicians, and rebuilders seeking a professionally manufactured replacement component for compatible Kawasaki applications.

Features:

• Improved sealing: Contact surfaces are designed to support reliable sealing around the intake and exhaust valves.

• High-temperature materials: Constructed with Viton® and PTFE for durability in demanding engine environments.

• Improved tolerance: Designed to provide improved tolerance over OEM valve seals for consistent fit and performance.

• Complete kit: Includes one full set of intake and exhaust valve seals.

• Quality controlled: 100% quality controlled for dependable manufacturing consistency.

• Made in the USA: Manufactured in the United States by Moose Offroad.

Ships from Parts Unlimited.