Wiseco® B1031 - Top End Bearing

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Product Details

Top End Bearing by Wiseco®. Length: 22.8mm. Inner Diameter: 20mm. Outer Diameter: 25mm. This product is made of high-quality materials to serve you for years to come. Designed using state-of-the-art technology and with customers in mind. It will meet your needs and deliver great quality at an affordable cost.


Inside Diameter: 20mm
Outside Diameter: 25mm
Length: 22.8mm
Type: KV
Position: Top End


  • Guaranteed workmanship and material quality
  • Peerless quality and superior consistency
  • Will provide seamless service for years
  • Engineered to the highest quality standards
  • Designed to help you get the most out of your vehicle

Wiseco® began the manufacture of pistons 70 years ago when founder Clyde Wiseman started making them in his garage. The pistons he made at that time were destined for use in big bore marine engines, and like so many successful companies that began in people’s garages, word of what he was doing spread and soon he was making pistons for friends and so business began to grow. When Wiseco was officially formed in 1941 it serviced the needs of racers and powersports enthusiasts, and today the powersports sector – predominantly motorcycles and ATVs – now accounts for the largest portion of the work done by the business.

Part Number:

Vehicle Fitment

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700 Classic Touring 2003-2004
700 PRO X 2003-2004
700 PRO X2 2004
700 RMK 1997-2004
700 SKS 2000-2003
700 SwitchBack 2004
Formula Deluxe 1999-2001
Formula Deluxe GS 2001
Formula Deluxe GSE 2001
Formula Z 1998-2000
Grand Touring GS 2001-2002
Grand Touring SE 2002-2003
Grand Touring Sport 2002-2003
GSX Limited 2004-2007
GSX Sport 2004-2008
GTX Limited 2006-2007
GTX Sport 2006-2008
MX Z 1997-2001
MX Z Adrenaline 2001, 2003-2009
MX Z Sport 2002
Skandic SUV 2003-2004, 2008
Summit 1999-2001
Summit Adrenaline 2003-2007
Summit Highmark 2000, 2002-2004
Summit Sport 2002
Summit X 2001-2005
Wet Jet
Kraze 1996-1997
ZX 1996-1997
FX-1 1994-1995
SJ700 Super Jet 1994-2014
SX500/R 2000-2001
Venture 500 1999-2001
VMAX 500 1994-2001
WaveBlaster 1993-1996
WaveBlaster 760 1996-1997
WaveRaider 1100 1995-1996
WaveRaider 700 1994-1997
WaveRaider 760 1996
WaveRaider Deluxe 1995
WaveRunner GP1200 1997-1999
WaveRunner GP760 1997-2000
WaveRunner III GP 1995
WaveRunner Pro VXR 1993-1994
WaveRunner SUV1200 1999-2004
WaveRunner XL1200 1998
WaveRunner XL700 1999-2001
WaveRunner XL760 1998-1999
WaveVenture 1100 1996-1997
WaveVenture 700 1995-1996, 1998
WaveVenture 760 1997
WaveVenture XL700 2002
XL700 WaveRunner XL700 2002-2004


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Wiseco® B1031 - Top End Bearing

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