K&N KN-142 High-Flow Synthetic Oil Filter for Yamaha WR and YZ Series

Built to withstand racing conditions, K&N delivers a high-quality oil filter which is built with a synthetic media specifically designed to withstand the high concentrates of synthetic racing oils. A large filter media provides high-flow rates and outstanding oil filtration to keep your motor running clean and smooth. K&N oil filters deliver performance and confidence!

Designed to meet the demands of high-performance racing engines, the K&N KN-142 oil filter features a synthetic media capable of withstanding the high concentrations of synthetic racing oils. Its large filter media surface area ensures high-flow rates while providing exceptional filtration, helping to keep your engine running smoothly and maintaining optimal oil cleanliness. Built with durability in mind, this filter includes a heavy-duty canister and base plate with a double-rolled seal that offers high burst strength and reliability under extreme conditions. The pre-lubed base gasket facilitates an easy and secure installation, ensuring a proper seal every time.
Equipped with a 17mm hex nut, the filter allows for quick and effortless installation or removal with a wrench, making maintenance hassle-free. The high-flow synthetic media is designed specifically for synthetic and synthetic blended oils, supporting your engine’s needs for consistent performance. Features such as a pressure relief valve and anti-drain back valve (where applicable) help protect your engine during cold starts and improve oil flow stability. The TUV-endorsed manufacturing process guarantees that each filter meets stringent quality standards, providing added confidence in your engine’s protection.
Available in chrome or black finishes, the K&N KN-142 oil filter combines performance, durability, and style. It is compatible with various Yamaha models including the WR426F, YZ426F, WR400F, and YZ400F from 1998 to 2002. Whether you are racing or maintaining a high-performance motorcycle, this filter offers dependable oil filtration that supports your engine’s longevity and optimal operation. Backed by the K&N Limited Warranty®, this filter ensures you receive a premium product designed for demanding riding conditions and extended service life.

Features:

• 17mm hex nut for easy installation and removal

• High-flow synthetic media supports synthetic and blended oils

• Uniform pleated media provides high capacity and filtration efficiency

• Heavy-duty canister and base plate with double-rolled seal for high burst strength

• Includes pressure relief and anti-drain back valves where applicable

• Manufactured with TUV-endorsed quality standards

• Pre-lubed base gasket for optimal sealing

• Available in chrome or black finishes

• Designed to fit Yamaha WR and YZ series motorcycles from 1998 to 2002

Fits 1987 Yamaha YFM350ER Moto-4 1987 Yamaha YFM350FW Big Bear 4WD [SRA] 1987 Yamaha YFM350X Warrior 1988 Yamaha YFM350ER Moto-4 1988 Yamaha YFM350FW Big Bear 4WD [SRA] 1988 Yamaha YFM350X Warrior 1988 Yamaha YFP350 Terra Pro 1989 Yamaha YFM350ER Moto-4 1989 Yamaha YFM350FW Big Bear 4WD [SRA] 1989 Yamaha YFM350X Warrior 1990 Yamaha YFM350ER Moto-4 1990 Yamaha YFM350FW Big Bear 4WD [SRA] 1990 Yamaha YFM350X Warrior 1991 Yamaha YFM350ER Moto-4 1991 Yamaha YFM350FW Big Bear 4WD [SRA] 1991 Yamaha YFM350X Warrior 1992 Yamaha YFM350ER Moto-4 1992 Yamaha YFM350FW Big Bear 4WD [SRA] 1992 Yamaha YFM350X Warrior 1993 Yamaha YFM350ER Moto-4 1993 Yamaha YFM350FW Big Bear 4WD [SRA] 1993 Yamaha YFM350X Warrior 1993 Yamaha YFM400FA Kodiak 4WD [SRA] 1994 Yamaha YFM350ER Moto-4 1994 Yamaha YFM350FW Big Bear 4WD [SRA] 1994 Yamaha YFM350X Warrior 1994 Yamaha YFM400FA Kodiak 4WD [SRA] 1995 Yamaha YFM350ER Moto-4 1995 Yamaha YFM350FW Big Bear 4WD [SRA] 1995 Yamaha YFM350FX Wolverine 4WD [SRA] 1995 Yamaha YFM350X Warrior 1995 Yamaha YFM400FA Kodiak 4WD [SRA] 1996 Yamaha YFM350FW Big Bear 4WD [SRA] 1996 Yamaha YFM350FX Wolverine 4WD [SRA] 1996 Yamaha YFM350U Big Bear 2WD [SRA] 1996 Yamaha YFM350X Warrior 1996 Yamaha YFM400FA Kodiak 4WD [SRA] 1997 Yamaha YFM350FW Big Bear 4WD [SRA] 1997 Yamaha YFM350FX Wolverine 4WD [SRA] 1997 Yamaha YFM350U Big Bear 2WD [SRA] 1997 Yamaha YFM350X Warrior 1997 Yamaha YFM400FA Kodiak 4WD [SRA] 1998 Yamaha WR400F 1998 Yamaha YFM350FW Big Bear 4WD [SRA] 1998 Yamaha YFM350FX Wolverine 4WD [SRA] 1998 Yamaha YFM350U Big Bear 2WD [SRA] 1998 Yamaha YFM350X Warrior 1998 Yamaha YFM400FA Kodiak 4WD [SRA] 1998 Yamaha YZ400F 1999 Yamaha WR400F 1999 Yamaha YFM350FW Big Bear 4WD [SRA] 1999 Yamaha YFM350FX Wolverine 4WD [SRA] 1999 Yamaha YFM350U Big Bear 2WD [SRA] 1999 Yamaha YFM350X Warrior 1999 Yamaha YFM400FA Kodiak 4WD [SRA] 1999 Yamaha YZ400F 2000 Yamaha TT-R250 2000 Yamaha WR400F 2000 Yamaha YFM350FX Wolverine 4WD [SRA] 2000 Yamaha YFM350X Warrior 2000 Yamaha YFM400 Big Bear 2WD [SRA] 2000 Yamaha YFM400FB Big Bear 4WD [SRA] 2000 Yamaha YZ426F 2001 Yamaha TT-R250 2001 Yamaha WR250F 2001 Yamaha WR426F 2001 Yamaha YFM350FX Wolverine 4WD [SRA] 2001 Yamaha YFM350X Warrior 2001 Yamaha YFM400 Big Bear 2WD [SRA] 2001 Yamaha YFM400FB Big Bear 4WD [SRA] 2001 Yamaha YZ250F 2001 Yamaha YZ426F 2002 Yamaha TT-R250 2002 Yamaha WR250F 2002 Yamaha WR426F 2002 Yamaha YFM350FX Wolverine 4WD [SRA] 2002 Yamaha YFM350X Warrior 2002 Yamaha YFM400 Big Bear 2WD [SRA] 2002 Yamaha YFM400FB Big Bear 4WD [SRA] 2002 Yamaha YZ250F 2002 Yamaha YZ426F 2003 Yamaha TT-R250 2003 Yamaha YFM350FX Wolverine 4WD [SRA] 2003 Yamaha YFM350X Warrior 2003 Yamaha YFM400 Big Bear 2WD [SRA] 2003 Yamaha YFM400FB Big Bear 4WD [SRA] 2004 Yamaha TT-R250 2004 Yamaha YFM350FX Wolverine 4WD [SRA] 2004 Yamaha YFM350R Raptor 2004 Yamaha YFM350X Warrior 2004 Yamaha YFM400 Big Bear 2WD [SRA] 2004 Yamaha YFM400FB Big Bear 4WD [SRA] 2005 Yamaha TT-R250 2005 Yamaha YFM350FX Wolverine 4WD [SRA] 2005 Yamaha YFM350R Raptor 2005 Yamaha YFM400FB Big Bear 4WD [SRA] 2006 Yamaha TT-R250 2006 Yamaha YFM350R Raptor 2006 Yamaha YFM400FB Big Bear 4WD [SRA] 2007 TM SMX 450F 2007 Yamaha YFM350R Raptor 2007 Yamaha YFM400FBI Big Bear 4WD [IRS] 2008 TM SMX 450F 2008 TM SMX 660F 2008 Yamaha YFM350R Raptor 2008 Yamaha YFM400FBI Big Bear 4WD [IRS] 2009 TM SMX 450F 2009 TM SMX 660F 2009 Yamaha YFM350R Raptor 2009 Yamaha YFM400FBI Big Bear 4WD [IRS] 2010 Yamaha YFM350R Raptor 2010 Yamaha YFM400FBI Big Bear 4WD [IRS] 2011 Yamaha YFM350R Raptor 2011 Yamaha YFM400FBI Big Bear 4WD [IRS] 2012 Yamaha YFM350R Raptor 2012 Yamaha YFM400FBI Big Bear 4WD [IRS] 2013 Yamaha YFM350R Raptor