Wiseco - Complete Top End Rebuild Kit 2-Stroke / 4-Stroke

Complete Top End Rebuild Kit 2-Stroke / 4-Stroke

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Rating 4.73 of 5 (20 Reviews)

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Wiseco Complete Top End Rebuild Kit 2-Stroke / 4-Stroke
  • Wiseco-forged high-silicon aluminum alloy pistons are computer-machined to exacting tolerances
  • Designed for greater strength with reduced weight and improved heat transfer
  • Piston kits come complete with hi-performance forged pistons (enough for one engine), rings, wrist pins, circlips and full top end gasket kit
  • Replacement pistons include rings and circlips
  • Made in the U.S.A.
**Notes:
  • Cylinder sleeving or replating may be required for oversizes
  • 02-06 Suzuki RM85 models must use stock thrust washers
  • 2004 CR125 Includes GP style piston. GP style pistons have a Hard Coat Anodized finish for improved wear characteristics

    **Closeouts are limited to stock on hand**
  • Item # 12678
  • SKU #
  • Mfr. Part #

FitmentView All

Honda Models

  • ATC250R : 1986
  • CR125R : 1992–2007
  • CR250R : 1992–2004
  • CR85R : 2003–2007
  • CR85R Expert : 2003–2007
  • CRF150R : 2007–2010, 2012–2016
  • CRF150R Expert : 2007–2009, 2012, 2015–2016
  • CRF250R : 2004–2007, 2014–2015
  • CRF250X : 2004–2009, 2012–2013, 2015
  • CRF450R : 2013–2015
  • CRF80F : 2004–2009, 2011–2013
  • FourTrax Rancher 350 (TRX350TM) : 2000–2006
  • FourTrax Rancher 350 4x4 (TRX350FM) : 2000–2006
  • FourTrax Rancher 350 4x4 ES (TRX350FE) : 2000–2006
  • FourTrax Rancher 350 ES (TRX350TE) : 2000–2006
  • TRX250EX : 2001–2008
  • TRX250R : 1986
  • TRX300 : 1988–2000
  • TRX300EX : 1993–2009
  • TRX300X : 2009
  • TRX450ER : 2009, 2012–2014
  • TRX450R : 2004–2009
  • XR100R : 1995
  • XR200R : 1994, 2000, 2002
  • XR80R : 1993–2003

Husqvarna Models

  • FE 501 : 2014–2016
  • TC 125 : 2014–2015
  • TE 125 : 2015

Kawasaki Models

  • Bayou 300 : 1988–2004
  • Bayou 300 4x4 : 1989–2004
  • Brute Force 750 4x4i : 2005–2007
  • KFX400 : 2003–2006
  • KFX450R : 2009–2011, 2014
  • KLX400 : 2003–2004
  • KLX400S : 2003
  • KX100 : 1995–2009, 2011–2016
  • KX125 : 2001–2002
  • KX250 : 1993–2001
  • KX250F : 2004–2006, 2011–2016
  • KX450F : 2013–2014
  • KX60 : 1986–2003
  • KX65 : 2000–2009, 2011–2016
  • KX80 : 1991–2000
  • KX80 Big Wheel : 1994
  • KX85 : 2001–2016
  • Lakota 300 : 1995–2000
  • Prairie 300 : 1999–2002
  • Prairie 300 4x4 : 1999–2002
  • Teryx 750FI 4x4 : 2008

KTM Models

  • 125 SX : 2007–2009, 2011–2016
  • 144 SX : 2007–2008
  • 150 SX : 2009–2015
  • 200 EXC : 2003–2005, 2010–2011
  • 200 MXC : 1998–2003
  • 200 XC : 2006–2009
  • 200 XC-W : 2006–2016
  • 250 EXC : 2010–2011
  • 250 EXC Six Days : 2011
  • 250 SX : 2007–2016
  • 250 XC : 2007–2016
  • 250 XC-W : 2007–2016
  • 300 EXC : 2005
  • 300 MXC : 2005
  • 300 XC : 2006–2016
  • 300 XC-W : 2006–2016
  • 300 XC-W Six Days : 2014–2016
  • 350 SX-F : 2011–2016
  • 50 SX : 2009–2014
  • 500 EXC : 2012–2016
  • 65 SX : 2009–2014
  • 85 SX : 2003–2004, 2011
  • 85 SX 17-14 : 2005–2015
  • 85 SX 19-16 : 2005–2015
  • 85 XC : 2008–2009

Suzuki Models

  • DR-Z400 : 2000–2007
  • DR-Z400E : 2000–2007
  • DR-Z400S : 2000–2009, 2011–2013
  • DR-Z400SM : 2005–2009, 2013
  • QuadRacer R450 : 2006–2009
  • QuadSport Z400 : 2003–2009
  • RM100 : 2003–2004
  • RM125 : 1991–2007
  • RM250 : 1992–1999, 2003–2008
  • RM60 : 2003
  • RM65 : 2003–2005
  • RM85 : 2002–2009, 2012–2015
  • RM85L : 2012
  • RM85L Big Wheel : 2003–2009
  • RMX250 : 1993–1998
  • RM-Z250 : 2004–2016
  • RM-Z450 : 2008–2016

Yamaha Models

  • Banshee 350 : 1987–2006
  • Big Bear 350 4x4 : 1989–1999
  • Big Bear 400 : 2000–2006
  • Big Bear 400 4x4 : 2000–2006
  • Blaster 200 : 1988–2006
  • Grizzly 350 Auto 4x4 : 2014
  • Grizzly 660 4x4 : 2002–2008
  • Kodiak 400 : 1993–1999
  • PW50 : 1986–1987, 1990–2009, 2012–2013
  • Raptor 350 : 2005–2011
  • Raptor 660R : 2001–2005
  • Raptor 700R : 2006–2009, 2011, 2014
  • Raptor 700R SE : 2014
  • Rhino 660 4x4 : 2005–2007
  • Warrior 350 : 1987–2004
  • WR250F : 2005–2009, 2011–2013, 2015–2016
  • WR250Z : 1995–1997
  • YFZ450 : 2004–2005
  • YZ125 : 1998–2016
  • YZ250 : 1995–1998, 2001–2016
  • YZ250F : 2005–2007, 2012–2015
  • YZ250FX : 2015–2016
  • YZ450F : 2010–2016
  • YZ450FX : 2016
  • YZ85 : 2002–2016

Product Reviews 1 - 15 of 20

Overall Rating: 4.73 of 5

(20 Reviews)
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What Other Riders Are Saying...

Fit

Quality

Installation

Recommend

works fine

Went in okay. One of the top o-rings was a pain in the ass, but it seemed to work out in the end. It recomended drilling a hole, but my old piston didn't have one, so I didn't feel like drilling my brand new piston.

grayson - July 31, 2015

(edmonton, AB)

Fit

Quality

Installation

Recommend

Was good...

Fit great and was an easy installation but blew it first time I took it to the track.

Jake - October 10, 2014

(Colchester, CT)

Fit

Quality

Installation

Recommend

Wisconsin top end kits kx65 kx 85

New Wisco top end kits for KX65 and KX85. The fit was great and had no problems at all- the bikes have been running good. My only recommendation is that you have to let the bikes warm up before you wind them out. You might get a little piston slap or nock.

Ed - August 18, 2014

(Methuen, MA)

Fit

Quality

Installation

Recommend

Wiseco piston

I put it all together very easily, but it blew up in less than 24 hours of installation!

Cooper - September 18, 2013

(Russellville, IN)

Fit

Quality

Installation

Recommend

Suzuki RM125 worked perfect

Went together easily, had all the parts needed and really rips now.

Bob - August 12, 2013

(Camp Verde, AZ)

Fit

Quality

Installation

Recommend

Weisco Top End Kits - CRF250R and 150R

We ride in tight woods and had ~125 hrs on OEM pistons (had a little skirt wear but no cylinder wear). This was my first top end install and needed to do two bikes. Kits were complete and quality seems excellent - great fit and performance. Instructions were OK, but not great - had to do a lot of learning on Web also. Highly recommend these kits, plan to get another kit for each bike in another 150 hrs.

Dave - June 26, 2013

(Genesee, ID)

Fit

Quality

Installation

Recommend

WiseCo TopEnd Kit

I researched for a top end kit and Wiseco always popped up as one of the best and always used, and I agree. Can't go wrong with Wiseco.

Gabriel - June 18, 2013

(Santa Maria, CA)

Fit

Quality

Installation

Recommend

Wiseco Rules!

You won't find a better way of freshening up a 2-stroke than a top end kit, and you won't find a better quality kit than this one by Wiseco. The Piston, ring, wrist pin and all seals are top nothch. The price is unbeatable for what comes with this kit!

Brian - January 15, 2013

(Bagdad, AZ)

Fit

Quality

Installation

Recommend

Piston works great....

Nice kit. Easy to install and all parts fit well and nicely machined. Waiting to find out how well it holds up with time.

PM - October 10, 2012

(East Granby, CT)

Fit

Quality

Installation

Recommend

wiseco top end kit

I bought the kit for my 2008 RM 250. piston is a nice piece of machining in a smooth bag, all pieces fit perfectly good explainations and work very well. This is a perfect match between good price and good quality, I will definitely use more of these kits in my bike !

Franck - September 21, 2012

(vaudreuil, QC)

Fit

Quality

Installation

Recommend

Top End Kit

Installation was pretty quick, but we did hit a snag with one of the top head gaskets. Had to put it in the freezer for a few minutes before it would settle in the inlet. Outside of that everything went in just fine.

Andy - August 20, 2012

(Bellevue, WA)

Fit

Quality

Installation

Recommend

just what I needed.

Complete package for top end rebuild! Highly recommended!

dan - June 22, 2012

(Mountlake terrace, WA)

Fit

Quality

Installation

Recommend

Excellent Kit

Even for an amateur like myself, this kit made the job extremely easy. All gaskets and o-rings were included, and the parts fit like a glove.

Jim - September 27, 2011

(Atlanta, GA)

Fit

Quality

Installation

Recommend

Good to go.

Great kit. This is how it should be. Everything you need, first time. Very straight forward. A monkey could rebuild a top end with this kit. Inexpensive too, which is nice for those of us who have to pay for our rides... I'll definitely go for this again when it's my 250's turn.

Daniel - June 14, 2011

(Lomita, CA)

Fit

Quality

Installation

Recommend

Wiseco top end kit

This kit is great I run wiseco pistons in all my bikes, they seem to not warp as easy as other brands, the only thing about this one kit was the wrist pin had absolutely zero clearance in the piston. I actually had to freeze the pin and piston overnight to shrink the metal so I could get the pin in and once they warmed back up they are together for good which in turn will suck if I change it again. Besides the tight clearance I recommend wiseco to any rider quality product from a company that has been around.

shane m - June 9, 2011

(brighton, MI)
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