Wiseco W6638 Head Gasket 68mm 2006-2009 Yamaha YZF-R6

The Wiseco W6638 is a precision-engineered replacement head gasket designed for the 2006–2009 Yamaha YZF-R6, featuring a 68mm bore diameter. Built to meet and exceed OEM specifications, this gasket delivers a reliable combustion seal essential for maintaining proper compression and engine performance.

Key Features:

• 68mm bore size — engineered to match OEM and Wiseco overbore piston combinations
• Premium materials — constructed to withstand high heat and pressure demands of sport motorcycle engines
• Superior sealing technology — provides a consistent, leak-free seal between the cylinder head and engine block
• Exceeds OEM standards — designed for both stock rebuilds and performance applications
• Direct-fit replacement — designed specifically for 2006–2009 Yamaha YZF-R6 engines

Whether you are rebuilding your YZF-R6 engine to stock specifications or upgrading with a Wiseco performance piston kit, the W6638 head gasket ensures a proper, durable seal for long-lasting engine integrity.