S&S CYCLE 97" Big Bore Forged Pistons For 1999-'06 HD® Big Twins - 3.927" Standard Bore - 106-3688
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These big bore pistons work with the stock 4" stroke flywheels to convert any 1999-'06 HD® big twin engine from 88" to 97" displacement with 9.7:1 compression with stock heads. Stock cylinders may be bored to accomodate larger pistons, but we recommend S&S 3.927" bore cylinders which feature high strength alloyed cast iron liners. Pistons are compatible with stock rods with tapered wristpin ends. S&S® 3.927" bore pistons are machined to such close tolerances that it is not necessary to measure the piston. Just bore cylinders to nominal diameter +/- 0.0005" for correct clearance. Additionally, the low friction coating on the piston skirt makes taking measurements very difficult. 3.927" standard bore.
- Piston kit includes forged pistons (unless noted) rings, wrist pins and clips for a complete motor replacement
- Made in the U.S.A
NOTES: S&S 3.937" & 3.927" pistons are machined to such close tolerances that it is not necessary to measure the piston. Additionally, the low friction coating on the piston skirt of early production pistons with out micrometer window makes taking measurements very difficult. Therefore, hone cylinders to nominal diameter +/- 0.0001" for correct clearance. Current production pistons have micrometer windows in the coating on the piston skirts that allow accurate measurements to be taken. These pistons may be installed by honing cylinder to nominal diameter +/- 0.0001" or by measuring piston and honing cylinder to achieve .002" - .0025" close clearance for street applications or .0032" - .0045" loose clearance for immediate competition use.
Fitment Guide
2016 | Harley-Davidson | Fat Boy S FLSTFBS | - | - |
2016 | Harley-Davidson | Softail Slim S FLSS | - | - |
2016 | Harley-Davidson | Low Rider S FXDLS | - | - |
2016 | Harley-Davidson | CVO Pro Street Breakout FXSE | - | - |
2014-2015 | Harley-Davidson | CVO Softail Deluxe FLSTNSE | - | - |
2013-2016 | Harley-Davidson | Breakout FXSB | - | - |
2013-2014 | Harley-Davidson | CVO Breakout FXSBSE | - | - |
2012-2016 | Harley-Davidson | Switchback FLD | - | - |
2012-2016 | Harley-Davidson | Softail Slim FLS | - | - |
2012 | Harley-Davidson | CVO Softail Convertible FLSTSE3 | - | - |
2011-2013 | Harley-Davidson | Blackline FXS | - | - |
2011 | Harley-Davidson | CVO Softail Convertible FLSTSE2 | - | - |
2010 | Harley-Davidson | CVO Fat Bob FXDFSE2 | - | - |
2010 | Harley-Davidson | CVO Softail Convertible FLSTSE | - | - |
2009-2016 | Harley-Davidson | Fat Boy Lo FLSTFB | - | - |
2009 | Harley-Davidson | CVO Softail Springer FXSTSSE3 | - | - |
2009 | Harley-Davidson | CVO Fat Bob FXDFSE | - | - |
2008-2016 | Harley-Davidson | Fat Bob FXDF | - | - |
2008-2011 | Harley-Davidson | Softail Cross Bones FLSTSB | - | - |
2008 | Harley-Davidson | Screamin' Eagle Dyna FXDSE2 | - | - |
2008 | Harley-Davidson | Screamin' Eagle Softail Springer FXSTSSE2 | - | - |
2007-2011 | Harley-Davidson | Softail Rocker C FXCWC | - | - |
2007-2010 | Harley-Davidson | Softail Rocker FXCW | - | - |
2007-2010 | Harley-Davidson | Softail Custom EFI FXSTC | - | - |
2007 | Harley-Davidson | Screamin' Eagle Dyna FXDSE | - | - |
2007 | Harley-Davidson | Screamin' Eagle Softail Springer FXSTSSE | - | - |
2006-2016 | Harley-Davidson | Street Bob FXDB | - | - |
2006 | Harley-Davidson | Softail Heritage EFI FLSTI | - | - |
2006 | Harley-Davidson | Screamin' Eagle Fat Boy FLSTFSE2 | - | - |
2006 | Harley-Davidson | Super Glide FXD35 | - | - |
2006 | Harley-Davidson | Softail Heritage FLST | - | - |
2005-2016 | Harley-Davidson | Softail Deluxe EFI FLSTNI | - | - |
2005-2014 | Harley-Davidson | Super Glide Custom EFI FXDCI | - | - |
2005-2007 | Harley-Davidson | Softail Springer Classic EFI FLSTSCI | - | - |
2005-2006 | Harley-Davidson | Softail Springer Classic FLSTSC | - | - |
2005-2006 | Harley-Davidson | Softail Deluxe FLSTN | - | - |
2005 | Harley-Davidson | Screamin' Eagle Fat Boy FLSTFSE | - | - |
2005 | Harley-Davidson | Super Glide Custom FXDC | - | - |
2005 | Harley-Davidson | 15th Anniversary Fat Boy FLSTF | - | - |
2004-2010 | Harley-Davidson | Super Glide EFI FXDI | - | - |
2004-2009, 2014-2016 | Harley-Davidson | Low Rider EFI FXDL | - | - |
2004-2005 | Harley-Davidson | Super Glide Sport EFI FXDXI | - | - |
2004 | Harley-Davidson | Screamin' Eagle Deuce FXSTDSE2 | - | - |
2003 | Harley-Davidson | Screamin' Eagle Deuce FXSTDSE | - | - |
2002 | Harley-Davidson | Wide Glide FXDWG3 | - | - |
2001-2016 | Harley-Davidson | Softail Heritage Classic EFI FLSTCI | - | - |
2001-2016 | Harley-Davidson | Softail Fat Boy EFI FLSTFI | - | - |
2001-2012 | Harley-Davidson | Softail Standard EFI FXSTI | - | - |
2001-2009 | Harley-Davidson | Softail Night Train EFI FXSTBI | - | - |
2001-2007 | Harley-Davidson | Softail Deuce EFI FXSTDI | - | - |
2001-2006 | Harley-Davidson | Softail Springer EFI FXSTSI | - | - |
2001-2003 | Harley-Davidson | Softail Heritage Springer EFI FLSTSI | - | - |
2001-2003 | Harley-Davidson | Super Glide T-Sport FXDXT | - | - |
2001 | Harley-Davidson | Wide Glide FXDWG2 | - | - |
2000-2008, 2010-2016 | Harley-Davidson | Wide Glide EFI FXDWGI | - | - |
2000-2006 | Harley-Davidson | Softail Deuce FXSTD | - | - |
2000-2006 | Harley-Davidson | Softail Standard FXST | - | - |
2000-2006 | Harley-Davidson | Softail Springer FXSTS | - | - |
2000-2006 | Harley-Davidson | Softail Night Train FXSTB | - | - |
2000-2006 | Harley-Davidson | Softail Heritage Classic FLSTC | - | - |
2000-2006 | Harley-Davidson | Softail Fat Boy FLSTF | - | - |
2000-2003 | Harley-Davidson | Softail Heritage Springer FLSTS | - | - |
1999-2006 | Harley-Davidson | Low Rider FXDL | - | - |
1999-2006 | Harley-Davidson | Wide Glide FXDWG | - | - |
1999-2006 | Harley-Davidson | Super Glide FXD | - | - |
1999-2005 | Harley-Davidson | Super Glide Sport FXDX | - | - |
1999-2000 | Harley-Davidson | Dyna Convertible FXDS-CONV | - | - |
Specs
PRODUCT NAME | PISTON KIT |
TYPE | REPLACEMENT |
PISTON MATERIAL | FORGED |
BORE SIZE | 3.927" |
BORE - OVERSIZE | STANDARD |
BORE OVERSIZE | STANDARD |
COMPRESSION RATIO | 9.7:1 |
DISPLACEMENT | 97" |
STROKE LENGTH | 4" |
PISTON HEAD SHAPE | FLAT TOP |
UNITS | KIT |
RIDING STYLE | STREET |
Delivery Info
Please Note - Warehouse Locations For This Part -
S&S CYCLE 97" Big Bore Forged Pistons For 1999-'06 HD® Big Twins - 3.927" Standard Bore - 106-3688
Gold Coast Warehouse- If your parts are in stock at our Gold Coast warehouse at the time of order, they will be shipped within 24hrs.
Supplier Warehouse - 2-3 Week Delivery- If your parts are located at our Supplier Warehouse, Delivery ETA is approx 2-3 weeks, as the parts are likely coming from our USA supplier warehouse. We will notify you once we receive it in Gold Coast warehouse and its on its way to you.