Description:

Wiseco Performance Top End Rebuild Kit

Part Number:PK1779
Piston Size: 83.50mm

• These kits contain everything you need to complete your rebuild the right way, the first time
• High Performance ring kit and alloy pin included with each piston kit for extended life and sustained power.
• Dedicated forgings used for superior strength to weight ratio utilizing aerospace alloy.
• All Piston Kits are precision crafted and forged in the USA

Wiseco's complete Top-End Piston Kits are offered for nearly every popular application in the powersports market. These kits contain everything you need to complete your rebuild the right way, the first time. High quality parts specifically chosen by us to match our forged pistons are included in this kit for easy one stop shopping. 2-stroke kits feature our Pro-Lite pistons that are CNC machined for optimal cam shape and profile for peak HP and service life. 4-stroke kits feature a race-ready dome finish with smooth edges for improved combustion flow. Horizontal slot-pin oiling reduces friction and provides scuff resistance, along with a pressure seal groove for maximum ring seal. 4-stroke race applications feature Wisecos Armor Glide skirt coating to provide reduced friction and noise to contribute to increased horsepower. Each piston is built from race proven designs that are chosen by the top race teams in all forms of racing including Super-cross, Motocross, GNCC, Super-bike, and more.

Fits:
2000-05 Yamaha YFM400 Big Bear
1993-99 Yamaha YFM400F Kodiak

• Displacement: 389cc
• Piston StandardBore: 83.00mm
• OversizeBore: 0.50mm
• Stroke: 71.50mm
• Compression Ratio: 8.6 : 1

Product Details

Items Included

Fitments

2012 Yamaha YFM400FB Big Bear 4x4 IRS
2011 Yamaha YFM400FB Big Bear 4x4 IRS
2010 Yamaha YFM400FB Big Bear 4x4 IRS
2009 Yamaha YFM400FB Big Bear 4x4 IRS
2008 Yamaha YFM400FB Big Bear 4x4 IRS
2007 Yamaha YFM400FB Big Bear 4x4 IRS
2007 Yamaha YFM400FBE Big Bear 4x4 IRS Exploring Edition
2012 Yamaha YFM400FBH Big Bear 4x4 IRS Hunter Edition
2011 Yamaha YFM400FBH Big Bear 4x4 IRS Hunter Edition
2010 Yamaha YFM400FBH Big Bear 4x4 IRS Hunter Edition
2009 Yamaha YFM400FBH Big Bear 4x4 IRS Hunter Edition
2008 Yamaha YFM400FBH Big Bear 4x4 IRS Hunter Edition
2007 Yamaha YFM400FBH Big Bear 4x4 IRS Hunter Edition
2000 Yamaha YFM400FH Big Bear 4x4 Hunter Edition
1999 Yamaha YFM400FW Kodiak 4x4
1998 Yamaha YFM400FW Kodiak 4x4
1997 Yamaha YFM400FW Kodiak 4x4
1996 Yamaha YFM400FW Kodiak 4x4
1995 Yamaha YFM400FW Kodiak 4x4
1994 Yamaha YFM400FW Kodiak 4x4
1993 Yamaha YFM400FW Kodiak 4x4
2006 Yamaha YFM400FWN Big Bear 4x4
2005 Yamaha YFM400FWN Big Bear 4x4
2004 Yamaha YFM400FWN Big Bear 4x4
2003 Yamaha YFM400FWN Big Bear 4x4
2002 Yamaha YFM400FWN Big Bear 4x4
2001 Yamaha YFM400FWN Big Bear 4x4
2000 Yamaha YFM400FWN Big Bear 4x4
2002 Yamaha YFM400FWNH Big Bear 4x4 Hunter Edition
2001 Yamaha YFM400FWNH Big Bear 4x4 Hunter Edition
2004 Yamaha YFM400N Big Bear 2x4
2003 Yamaha YFM400N Big Bear 2x4
2002 Yamaha YFM400N Big Bear 2x4
2001 Yamaha YFM400N Big Bear 2x4
2000 Yamaha YFM400N Big Bear 2x4
2002 Yamaha YFM400NH Big Bear 2x4 Hunter Edition
2001 Yamaha YFM400NH Big Bear 2x4 Hunter Edition