The Cometic C3159-EST 85mm Top End Gasket Kit is designed to support reliable engine rebuilding and improved low-end power in select Yamaha ATV applications. The kit raises compression while providing the sealing performance needed for top-end service. It is engineered for use with Yamaha YFM350 Bruin and YFM400 Big Bear models listed below.
Cometic manufactures this gasket kit using application-specific materials selected for durability, flexibility, and torque retention. The graphite gaskets feature a steel core laminated on both sides with flexible graphite, helping maintain a dependable seal through engine heat cycles. Fiber gaskets are designed for maximum sealing performance, flexibility, and torque retention, while the included O-ring gaskets meet or exceed OEM specifications.
Fitment includes 2004–2006 Yamaha YFM350BA Bruin 2WD [SRA], 2004–2006 Yamaha YFM350FA Bruin 4WD [SRA], and 2000–2003 Yamaha YFM400FB Big Bear 4WD [SRA]. Verify the model, year, engine configuration, and required gasket application before installation. This Cometic top end gasket kit is supplied under manufacturer part number C3159-EST and vendor part number 68-31590E.
Features:
- Compression Increase: Raises compression for improved low-end power.
- Graphite Construction: Uses a steel core laminated on both sides with flexible graphite for dependable sealing.
- Fiber Gaskets: Designed for maximum seal performance, flexibility, and torque retention.
- O-Ring Gaskets: Meet or exceed OEM specifications for reliable engine sealing.
- Fitment: Fits select 2000–2006 Yamaha YFM350 Bruin and YFM400 Big Bear ATV models.
- Brand: Cometic.
- Manufacturer Part Number: C3159-EST.
- Vendor Part Number: 68-31590E.
- Size: 85mm top end gasket kit.
Fitment:
1987 Yamaha YFM350FW Big Bear 4WD [SRA]
1987 Yamaha YFM350X Warrior
1988 Yamaha YFM350FW Big Bear 4WD [SRA]
1988 Yamaha YFM350X Warrior
1989 Yamaha YFM350FW Big Bear 4WD [SRA]
1989 Yamaha YFM350X Warrior
1990 Yamaha YFM350FW Big Bear 4WD [SRA]
1990 Yamaha YFM350X Warrior
1991 Yamaha YFM350FW Big Bear 4WD [SRA]
1991 Yamaha YFM350X Warrior
1992 Yamaha YFM350FW Big Bear 4WD [SRA]
1992 Yamaha YFM350X Warrior
1993 Yamaha YFM350FW Big Bear 4WD [SRA]
1993 Yamaha YFM350X Warrior
1994 Yamaha YFM350FW Big Bear 4WD [SRA]
1994 Yamaha YFM350X Warrior
1995 Yamaha YFM350FW Big Bear 4WD [SRA]
1995 Yamaha YFM350FX Wolverine 4WD [SRA]
1995 Yamaha YFM350X Warrior
1996 Yamaha YFM350FW Big Bear 4WD [SRA]
1996 Yamaha YFM350FX Wolverine 4WD [SRA]
1996 Yamaha YFM350U Big Bear 2WD [SRA]
1996 Yamaha YFM350X Warrior
1997 Yamaha YFM350FW Big Bear 4WD [SRA]
1997 Yamaha YFM350FX Wolverine 4WD [SRA]
1997 Yamaha YFM350U Big Bear 2WD [SRA]
1997 Yamaha YFM350X Warrior
1998 Yamaha YFM350FW Big Bear 4WD [SRA]
1998 Yamaha YFM350FX Wolverine 4WD [SRA]
1998 Yamaha YFM350U Big Bear 2WD [SRA]
1998 Yamaha YFM350X Warrior
1999 Yamaha YFM350FW Big Bear 4WD [SRA]
1999 Yamaha YFM350FX Wolverine 4WD [SRA]
1999 Yamaha YFM350U Big Bear 2WD [SRA]
1999 Yamaha YFM350X Warrior
2000 Yamaha YFM350FX Wolverine 4WD [SRA]
2000 Yamaha YFM350X Warrior
2000 Yamaha YFM400 Big Bear 2WD [SRA]
2000 Yamaha YFM400FB Big Bear 4WD [SRA]
2001 Yamaha YFM350FX Wolverine 4WD [SRA]
2001 Yamaha YFM350X Warrior
2001 Yamaha YFM400 Big Bear 2WD [SRA]
2001 Yamaha YFM400FB Big Bear 4WD [SRA]
2002 Yamaha YFM350FX Wolverine 4WD [SRA]
2002 Yamaha YFM350X Warrior
2002 Yamaha YFM400 Big Bear 2WD [SRA]
2002 Yamaha YFM400FB Big Bear 4WD [SRA]
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 YFM350BA Bruin 2WD [SRA]
2004 Yamaha YFM350FA Bruin 4WD [SRA]
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 YFM350BA Bruin 2WD [SRA]
2005 Yamaha YFM350FA Bruin 4WD [SRA]
2005 Yamaha YFM350FX Wolverine 4WD [SRA]
2005 Yamaha YFM350R Raptor
2005 Yamaha YFM400FB Big Bear 4WD [SRA]
2006 Yamaha YFM350BA Bruin 2WD [SRA]
2006 Yamaha YFM350FA Bruin 4WD [SRA]
2006 Yamaha YFM350R Raptor
2006 Yamaha YFM400FB Big Bear 4WD [SRA]
2007 Yamaha YFM350R Raptor
2008 Yamaha YFM350R Raptor
2009 Yamaha YFM350R Raptor
2010 Yamaha YFM350R Raptor
2011 Yamaha YFM350R Raptor
2012 Yamaha YFM350R Raptor
2013 Yamaha YFM350R Raptor