KB Hypereutectic Piston Kit +.010" Bore (KB272.010)
- Manufactured from high-strength, T-5 heat-treated, 390 hypereutectic aluminum alloy
- Allows a tighter fit and longer piston and ring life
- Diamond-machined pistons are held to plus or minus one gram weight and less than one-half-thousandth-inch (.0005") tolerances from piston to piston
- Each kit contains two pistons, pins, spiral-lock pin clips and Hastings moly rings
- Replacement piston rings sold separately
- KB pistons can be installed tighter than other pistons. This results in less piston rock and better ring seal. Please read instructions included with piston for correct piston clearance.
- Due to the thermal conductivity and design of KB pistons, special attention is required to the top ring end gap. Please read instructions furnished with piston for correct ring installation.
- 3.498 in. Bore Size.
- 10.0:1 Compression Ratio.
NOTE: 2008-2018 models require using 1200cc cylinders; Use lock rings Part #0913-0001 (4-pk)
| Compatible Vehicles | |||
| Years | Make | Make | Notes |
| 2010-2022 | Harley-Davidson | Forty Eight XL1200X | |
| 2018-2019 | Harley-Davidson | Forty Eight XL1200XS Special | |
| 2018-2021 | Harley-Davidson | Iron 1200 XL1200NS | |
| 2009-2022 | Harley-Davidson | Iron 883 XL883N | |
| 2016-2020 | Harley-Davidson | Roadster XL1200CX | |
| 2012-2016 | Harley-Davidson | Seventy Two XL1200V | |
| 2002-2019 | Harley-Davidson | Sportster 1200 Custom XL1200C | |
| 1996-2001 | Harley-Davidson | Sportster 1200 Custom XLH1200C | |
| 2006-2011 | Harley-Davidson | Sportster 1200 Low XL1200L | |
| 2007-2012 | Harley-Davidson | Sportster 1200 Nightster XL1200N | |
| 2004-2008 | Harley-Davidson | Sportster 1200 Roadster XL1200R | |
| 2002-2003 | Harley-Davidson | Sportster 1200 Sport XL1200S | |
| 1996-2001 | Harley-Davidson | Sportster 1200 Sport XLH1200S | |
| 2014-2017 | Harley-Davidson | Sportster 1200 Super Low XL1200T | |
| 1988-2003 | Harley-Davidson | Sportster 1200 XLH1200 | |
| 2009-2010 | Harley-Davidson | Sportster 1200 XR1200 | |
| 2011-2012 | Harley-Davidson | Sportster 1200 XR1200X | |
| 2002-2009 | Harley-Davidson | Sportster 883 Custom XL883C | |
| 1999-2001 | Harley-Davidson | Sportster 883 Custom XLH883C | |
| 1986-1995 | Harley-Davidson | Sportster 883 Deluxe XLH883 | |
| 1987-2003 | Harley-Davidson | Sportster 883 Hugger XLH883 | |
| 2005-2010 | Harley-Davidson | Sportster 883 Low XL883L | |
| 2002-2003 | Harley-Davidson | Sportster 883 Roadster XL883R | |
| 2005-2007 | Harley-Davidson | Sportster 883 Roadster XL883R | |
| 2011-2019 | Harley-Davidson | Sportster 883 Super Low XL883L | |
| 2004-2008 | Harley-Davidson | Sportster 883 XL883 | |
| 1986-2003 | Harley-Davidson | Sportster 883 XLH883 | |