Wiseco Big Bore Piston Kit 3.937" 10.0:1

(19 reviews)

Item: 383146-808422

$620.77

Select Your Vehicle - Fitment Guaranteed

  • In Stock - Ships Today Fast & Free!

Wiseco Big Bore Piston Kit 3.937" 10.0:1


  • Forged from a high-silicone aluminum alloy to deliver long life and consistent dimensions
  • Wiseco's high-tech manufacturing ensures greater operating strength and lower expansion at high temperatures
  • Forged pistons with coated skirts, rings, retainer clips and chrome piston pins
  • Kit includes enough pistons, rings, piston pins and circlips to service your specific application
  • Made in the USA

Product Note: May require cylinder boring or replacement big bore cylinder.

Specification Details
Bore 3.937 in.
Compression Ratio 10.0:1
Country of Origin USA
Displacement 1596cc
Material Aluminum
Size Over Standard Stock

Vehicle Fitment


Fitment is guaranteed or your money back plus free return shipping.
Don’t waste time installing a product that doesn't fit. We worked hard ensuring that this product is an exact fit on the vehicles listed below.

Harley Davidson
  • FLD Dyna Switchback 2012-2016
  • FLHR Road King 1999-2016
  • FLHRC Road King Classic 2007-2013
  • FLHRCI Road King Classic 1999-2006
  • FLHRI Road King 1999-2006
  • FLHRS Road King Custom 2004-2007
  • FLHT Electra Glide Standard 1999-2009
  • FLHTC Electra Glide Classic 1999-2005, 2007-2013
  • FLHTCI Electra Glide Classic 1999-2006
  • FLHTCU Ultra Classic Electra Glide 1999-2014
  • FLHTCUI Ultra Classic Electra Glide 1999-2006
  • FLHTCUL Electra Glide Ultra Classic Low 2015-2016
  • FLHTCUTG Tri Glide Ultra Classic 2009-2014
  • FLHTI Electra Glide Standard 2003-2006
  • FLHTK Electra Glide Ultra Limited 2010-2014
  • FLHX Street Glide 2006-2016
  • FLHXI Street Glide 2006
  • FLHXS Street Glide Special 2014-2016
  • FLHXXX Street Glide Trike 2010-2011
  • FLRT Freewheeler 2015-2016
  • FLS Softail Slim 2012-2017
  • FLSS Softail Slim S 2016-2017
  • FLST Heritage Softail 2006
  • FLSTC Heritage Softail Classic 2000-2014
  • FLSTCI Heritage Softail Classic 2001-2006
  • FLSTF Softail Fat Boy 2000-2014
  • FLSTFB Softail Fat Boy Lo 2010-2016
  • FLSTFBS Softail Fat Boy S 2016-2017
  • FLSTFI Softail Fat Boy 2001-2006
  • FLSTI Heritage Softail 2006
  • FLSTN Softail Deluxe 2005-2014
  • FLSTNI Softail Deluxe 2005-2006
  • FLSTS Heritage Springer Softail 2000-2003
  • FLSTSB Softail Cross Bones 2008-2011
  • FLSTSC Softail Springer Classic 2005-2007
  • FLSTSCI Softail Springer Classic 2005-2006
  • FLSTSI Heritage Springer Softail 2001-2003
  • FLTR Road Glide 1999-2004, 2007-2009
  • FLTRI Road Glide 2000-2006
  • FLTRU Road Glide Ultra 2011-2013
  • FLTRX Road Glide Custom 2010-2013
  • FLTRXS Road Glide Special 2015-2016
  • FXCW Softail Rocker 2008-2009
  • FXCWC Softail Rocker C 2008-2011
  • FXD Dyna Super Glide 1999-2005, 2007-2010
  • FXDB Dyna Street Bob 2007-2017
  • FXDBI Dyna Street Bob 2006
  • FXDBP Dyna Street Bob Custom 2013-2014
  • FXDC Dyna Super Glide Custom 2005, 2007-2014
  • FXDCI Dyna Super Glide Custom 2005-2006
  • FXDF Dyna Fat Bob 2008-2017
  • FXDI Dyna Super Glide 2004-2006
  • FXDI35 35th Anniversary Dyna Super Glide 2006
  • FXDL Dyna Low Rider 1999-2005, 2007-2009, 2014-2017
  • FXDLS Dyna Low Rider S 2016-2017
  • FXDS-CONV Dyna Convertible 1999-2000
  • FXDWG Dyna Wide Glide 1999-2005, 2007-2008, 2010-2014
  • FXDWGI Dyna Wide Glide 2004-2006
  • FXDX Dyna Super Glide Sport 1999-2005
  • FXDXI Dyna Super Glide Sport 2004-2005
  • FXS Softail Blackline 2011-2013
  • FXSB Softail Breakout 2013-2017
  • FXST Softail Standard 2000-2007
  • FXSTB Softail Night Train 2000-2009
  • FXSTBI Softail Night Train 2001-2006
  • FXSTC Softail Custom 2007-2010
  • FXSTD Softail Deuce 2000-2007
  • FXSTDI Softail Deuce 2001-2006
  • FXSTI Softail Standard 2001-2006
  • FXSTS Springer Softail 2000-2006
  • FXSTSI Springer Softail 2001-2006

Customer Reviews


Great

By Shannon H. on  Verified Purchaser

Great product for the price.


Great

By Chris S. on  Verified Purchaser

Great fitment, bike runs great.


Great kit

By Taylor P. on  Verified Purchaser

Great kit. Huge power upgrade.


Wiseco piston

By Timothy L. on  Verified Purchaser

Perfect fit with more power.


100% Quality

By MOTODAD. on  Verified Purchaser

Wiseco always makes a great quality product. Ive used them many times over the years an never had failures. Failures mostly happen due to lack of preventive mat. Nothing last forever!


Thanks

By James B. on  Verified Purchaser

Worked great.


Wiseco Piston

By Terry C. on  Verified Purchaser

Excellent part.


Awesome parts!

By Michael C. on  Verified Purchaser

I ordered this piston kit and an Athena Cylinder as well. All parts were correct, well priced, and arrived in good shape ready to go on.


Great product

By Jacob L. on  Verified Purchaser

5 stars


Wiseco Piston Kit

By Jacob L. on  Verified Purchaser

5 stars


Perfect fit

By Nathaniel P. on  Verified Purchaser

Perfect fit, correct size rings came with it, and gaskets were a perfect fit, and the wrist pin was pristine.


Great product

By Debbie A R. on  Verified Purchaser

Great product! Great price! Thank you!


Got it for the Polaris 250 I had bored .50 over

By Anthony L. on  Verified Purchaser

I never write reviews but then again I've never been this satisfied with service. I ordered it Thursday got it Saturday kids were riding Sunday! Honestly super impressed by how fast it got here, it was in great shape and fit like a glove.


Love the part

By Robert O. on  Verified Purchaser

Awesome, thanks.


Wiseco Piston Kit

By Tracy M. on  Verified Purchaser

Part was exactly what we ordered.


She’s a ripper!

By Zach T. on  Verified Purchaser

I’ve put about 30 hours of hard riding on this and it’s been holding up well! I highly recommend it. Just be sure to fully warm up your engine before doing anything hard on the engine.


Great quality and value

By bob h. on  Verified Purchaser

Very impressed with the design of the pistons, added oil ports in the ring grooves, the machining is high quality, the detailed packaging show how much pride they take in their work.


Wiseco Piston

By Robert S. on  Verified Purchaser

5 Stars


Awesome piston and preforms perfectly.

By Billy K. on  Verified Purchaser

Very high quality piston just like you would expect from Wiseco. Shipped quickly and very well packaged. Yamaha Bigbear 350 is running better than it ever has after a top end rebuild and a carb kit. Honed out the OEM cylinder and ring gap was .018 with the rings sent. Specs said 16-20 so right in the middle. Very clear instructions on checking gap and positioning ring gaps on piston. 93 Octane and thing is way snappier on tip-in than it ever has been. Totally satisfied with Wiesco on this one.


How many stars would you give this product? Write a review.

Questions & Answers


Will this fit my 92 trail boss 250 2x4

By John

?

So long as you have chosen a 1992 Polaris Trail Boss 250 2X4 and you have a stock bore size cylinder, you should have no problem with fitment.

By Andy

Will this fit a 1990 Honda xr200r

By Eddie

Yes, just be sure of what size bore your cylinder is before ordering.

By Andy

Would this fit a 96 xr200r with a 65.5mm bore

By Andy

I believe that bike came with a 65.5mm bore from the factory, so you would just need to choose stock size before adding to your cart.

By Andy

Have a question? Please ask our experts and customers who own this product.